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Episode description

Are we doing enough to support the employers who train the next generation of plumbing and heating engineers?

In this special episode of BetaTalk, Nathan welcomes Barry Sharp, Emma Bohan and Stephanie Lowe from SNIPEF to discuss new research into apprenticeships in Scotland and the growing challenges facing employers who want to take on apprentices.

The research highlights a fundamental problem with the current apprenticeship system: employers are the forgotten part of the equation.

While colleges and training providers receive funding to deliver apprenticeship programmes, and apprentices receive wages and support, the businesses responsible for providing the majority of practical, workplace training are often left to cover the costs themselves.

For small plumbing and heating businesses, particularly sole traders and micro employers, taking on an apprentice is becoming increasingly difficult. Rising wages, National Insurance costs, insurance, tools, uniforms, administration and the considerable time required to train someone all add up.

The discussion explores why encouraging more young people to become apprentices isn't necessarily the answer. There are already young people looking for plumbing and heating apprenticeships. The real challenge is finding employers who can afford to take them on.

Nathan and the guests also discuss the need for a better apprenticeship funding model, including a proposed funding structure that supports employers progressively throughout the four years of an apprenticeship.

Other topics include the differences between plumbing and heating apprenticeships and other trades, the limitations of college-based learning, the importance of connecting classroom theory with practical experience, and how manufacturers could help fund apprenticeships as part of their investment in the future heating workforce.

With the UK needing tens of thousands of additional heat pump engineers to meet its decarbonisation targets, supporting employers to train new people has never been more important.

This is an important conversation about the future of plumbing and heating apprenticeships, skills shortages, youth employment and the people who actually make apprenticeships work.

What we discuss in this episode

1. The SNIPEF apprenticeship research: Why the research was commissioned and what employers across Scotland told SNIPEF about the challenges of taking on apprentices.
2. The apprenticeship triangle: Why employers, apprentices and training providers must all be recognised and supported for the apprenticeship system to work.
3. The real cost of employing an apprentice: Wages, pensions, National Insurance, insurance, tools, PPE, uniforms, administration and the time spent training.
4. Why employers are turning away apprentices: Young people are actively looking for opportunities, but businesses increasingly struggle to afford the commitment.
5. Funding for plumbing and heating apprenticeships in Scotland: How apprenticeship funding is allocated and why SNIPEF believes employers need direct financial support.
6. A better apprenticeship funding model: The suggestion of increasing employer support during the early years, with contributions changing as apprentices develop their skills and become more productive.
7. The apprenticeship levy: Could unused apprenticeship levy funding be redirected to support smaller businesses and employers who do not pay into the levy?
8. The differences between plumbing and heating and other trades: Why emergency repairs, unpredictable working hours, travel and customer commitments create additional challenges for plumbing and heating employers.
9. College training versus workplace learning: Why practical training and classroom theory need to be connected to what apprentices are actually doing on site.
10. The problem with poor working practices: Why an apprentice's employer is such an important influence on their training and why qualifications alone do not necessarily demonstrate competence.
11. Manufacturers supporting apprenticeships: The example of Vaillant funding low-carbon heating apprenticeships and working with independent employers to provide workplace experience.
12. The future of heat pump training: Why the transition to low-carbon heating requires a much larger skilled workforce and greater investment in apprenticeships.
13. The importance of supporting small businesses: Why sole traders and micro businesses need practical help with payroll, training responsibilities and the administration involved in employing apprentices.
14. The future of plumbing and heating careers: Why apprenticeships offer young people a route into well-paid, skilled employment without the university debt associated with many other career paths.

Key takeaway

Apprenticeships cannot exist without employers.

If the plumbing and heating industry wants more skilled engineers, particularly to support the transition to low-carbon heating and heat pumps, it must make employing and training apprentices financially viable.

The industry doesn't simply need to encourage more young people to apply for apprenticeships. It needs to support the businesses that make those apprenticeships possible.

Guests

Stephanie Lowe – SNIPEF

Discussing the research, the Scottish apprenticeship system, employer funding and SNIPEF's campaign to ensure employers are recognised as an essential part of apprenticeship training.

Barry Sharp

Sharing his experience and perspective on the challenges facing plumbing and heating employers and the need to make apprenticeships more sustainable.

Emma Bohan

Discussing the financial realities of employing apprentices, workplace training, employer investment and the future skills needed by the heating industry.

About BetaTalk

BetaTalk is a podcast exploring plumbing, heating, renewable energy, heat pumps, industry training and the people shaping the future of the heating sector.

Hosted by Nathan, BetaTalk brings together installers, manufacturers, trainers, industry experts and policymakers to discuss the issues affecting the plumbing and heating industry.

Website: https://betateach.co.uk

Sponsored by Payaka, UK Rads, Cast Rads, Primary Pro, Heat Engineer Software and Wolseley's Renewable Centre.

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Release Date: Heat Pump Week (UK)

Host: Nathan Gambling (Beta Teach)

Guests:

• Joe Sharp (Editor, Installer Online)
• Barry Sharp (Guild of Master Heat Engineers)
• Mark Denman (Guild of Master Heat Engineers)
• Michael Warring (Guild of Master Heat Overview

In this special Heat Pump Week episode, host Nathan Gambling is joined by Joe Sharp from Installer Online and three expert members of the Guild of Master Heat Engineers. 

Recorded for the Installer Show and the Heat Pump Association (HPA), this episode addresses the top eight questions submitted and voted on by readers of the Beta Teach newsletter.

Episode Q&A Summary 
1. Do Large National Installation Companies Cause Issues for SMEs?

• The Consensus: Mostly yes initially, but market dynamics are shifting. Early on, some national players entered with rapid, low pricing that set unrealistic customer expectations. Regulatory fines for misinformation have since prompted market corrections.
• Local vs. National Impact: Independent installers note that homeowners often prefer a local engineer performing the survey rather than a corporate salesperson. National firms typically operate with a rigid "fit-in-the-box" mentality; when installations fall outside these parameters, they frequently refer leads back to local specialists.

Market Outlook: The general agreement is that a rising tide lifts all boats, and business-size friction will naturally ease as demand scales.

2. Are We Seeing Breakdowns with Heat Pumps Installed Less Than Five Years Ago?

• Reliability Findings: Core heat pump units are exceptionally reliable and robust. True component failures typically follow a standard "bathtub curve" (failing early due to manufacturing flaws or much later at end-of-life).
• Common Causes of Early System Issues: Problems arising within the first five years are almost universally tied to poor system design, incorrect commissioning, running systems at excessively high temperatures, or inadequate water quality management.
• Water Quality Standards: Guild engineers advocate rigorous chemical and hot flushing combined with demineralisation (using VDI units) rather than relying solely on chemical inhibitors. Guild Engineers regard Ricky from Thoroughflush as being the expert in helping engineers how to clean and keep heating systems from corroding. 

3. What Are the Pitfalls in Underfloor Heating Design and Installation?

• The Design Gap: Underfloor heating (UFH) is seen as the gold standard emitter for heat pumps, but standard supplier designs often focus on selling pipe rather than tailoring layouts. Standard layouts default to uniform spacing (such as 150mm centres) without evaluating individual room heat losses or specific floor coverings.
• Overheating and Flooring Risks: Oversized heat outputs under sensitive floor coverings (like LVT) can cause flooring to delaminate or rooms to overheat. Proper design requires variable pipe spacing tailored to specific room loads.
• Zoning Strategy: Rather than using individual room thermostats to cycle zones on and off aggressively, control systems should manage maximum temperature thresholds to maintain steady system efficiency.

4. What Would Encourage Guild Engineers to Do More Public Sector Work?

• Procurement Barriers: Public sector and local authority procurement frameworks remain heavily weighted on upfront capital cost rather than long-term system efficiency and whole-life value.
• Quality vs. Cost: Independent engineers find it difficult to compete under bureaucratic tender processes that prioritize the lowest bidder over engineered design quality, proper hydraulic balancing, and low-carbon performance.
• Administrative Burden: Strict Service Level Agreements (SLAs), severe penalties, and red tape mean that participating requires specialized corporate sizing and resources.

5. How Might We Protect Low-Income Homes from Poor Installations?

• Performance Over Vanity: Guild engineers emphasize that focus should center on actual running cost per kilowatt-hour of heat generated rather than rigid Coefficient of Performance (COP) vanity figures.
• Proven Design: Ensuring every installation has a fully documented, provable design (heat loss calculations and correct emitter sizing) prevents poor setups.
• User Education: Case studies show identical systems in neighboring properties yield vastly different running costs, making post-installation homeowner education on operating heat pumps correctly just as vital as the hardware itself.

6. What Are the Top Problems with Apprentices and Apprenticeships?

• Funding and College Structure: The current apprenticeship funding model heavily favors college structures rather than supporting small-business employers who deliver the primary hands-on training.
• Outdated Theory vs. Practice: Tutors are often disconnected from modern low-temperature heating techniques, and young apprentices are sometimes pushed into trades without sufficient foundational maturity.
• Operational Realities: Unlike trades where workers down tools sharply at 5:00 PM, plumbing and heating emergencies (like leaks or heating failures) often require staying on-site late, creating legal and logistical challenges for employing non-family apprentices.

7. How Can the Consumer Information Gap Be Overcome?

• Consistent Messaging: The industry suffers from a noisy media landscape and contradictory advice. 
• Trusted Repositories: Consumers should be guided away from rumors toward credible, expert-led platforms (such as specialised independent websites, community-run renewable hubs, and installer networks) that champion transparency and real-world performance data.

8. Heat Loss Calculations: Using HTC Measurements vs. Room-by-Room Design

• Whole-House HTC Limitations: While Heat Transfer Coefficient (HTC) measuring tools and sensors give a good high-level indication of whole-house heat loss, engineers note there can be a wide margin of error in practice.
• Why Room-by-Room Is Essential: Whole-house measurements cannot replace room-by-room calculations. Individual rooms vary significantly in external wall exposure, glazing, and heat loss parameters, making room-by-room design necessary to size radiators and pipework accurately.
• Episode Timestamps
  • 00:03 – Introduction to Heat Pump Week with Installer Online and the Guild of Master Heat Engineers.
  • 02:26 – Question 1: Do large national installation companies negatively impact SME installers?
  • 09:40 – Question 2: Reliability assessment and failure causes in heat pumps under five years old.
  • 19:29 – Question 3: Underfloor heating design pitfalls, pipe centres, and floor covering constraints.
  • 28:03 – Question 4: Public sector work incentives and procurement hurdles for independent heat engineers.
  • 33:20 – Question 5: Protecting low-income homes, running costs, and system monitoring.
  • 40:40 – Question 6: Challenges with plumbing apprenticeships, college funding, and trade working hours.
  • 52:14 – Question 7: Overcoming the consumer information gap and establishing consistent messaging.
  • 01:00:56 – Question 8: Heat Transfer Coefficient (HTC) measurement tools vs. room-by-room heat loss calculations.
  • 01:02:54 – Heat Pump Week wrap-up and closing sponsor acknowledgments.

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Episode Overview

In this episode of BetaTalk, host Nathan Gambling sits down with Johan du Plessis, founder and CEO of Tepeo, to discuss the Zero Emission Boiler (ZEB) and the evolving landscape of UK heat decarbonisation. 

Johan shares his journey from oil and gas engineering and smart energy management at Ovo/Kaluza to developing a high-density ceramic heat battery that offers a plug-and-play alternative for homes looking to electrify. They dive deep into why flexibility and consumer choice are critical to achieving net zero, how heat batteries fit into the government's Warm Homes Plan and the Boiler Upgrade Scheme, and the role real-world empirical heat loss data plays in modern heating system design. 

Key Topics Covered

• The Origin of the ZEB: How smart energy aggregation and grid flexibility inspired a dry-core ceramic thermal store that mimics the installation simplicity of a gas boiler. 

• Demand-Side Flexibility & Grid Integration: Harnessing half-hourly flexible tariffs to absorb excess renewable energy, lower heating costs, and alleviate grid curtailment. 

• Policy & Subsidy Landscape: The inclusion of heat batteries in the Warm Homes Plan and the upcoming £2,500 Boiler Upgrade Scheme (BUS) grant. 

• Thermal Storage vs. Chemical Batteries: Why high-temperature thermal storage offers a lower-cost, highly durable alternative without degradation over 20+ years. 

• Bridging the Data & Policy Gap: Moving away from static EPC estimates toward measured heat loss coefficients to right-size domestic systems accurately. 

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On the birthday of my late mum and the first anniversary of the Guild of Master Heat Engineers I have finally managed to get my cousin, Philip Gambling, on the podcast. He installed some of the first VRV/VRF systems in the UK. 

Joining him is another industry veteran Bob Beattie

Check it out and take a listen...it does get technical in parts

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In this episode of BetaTalk, host Nathan welcomes heat pump expert Graham Hendra to discuss his latest project: an AI-driven platform called Energy Donkey, developed in collaboration with Planet Devices.

Designed to replace frustrating online forums and standard LLMs that mix reliable and poor advice, Energy Donkey leverages a curated repository of verified engineering data and real-time operational metrics. The system functions across three distinct service levels:

• Free Homeowner Advice: Answers standard consumer questions regarding heat pump suitability, noise, and installation requirements using verified technical data.
• Direct Unit Control: Interfaces directly with heat pump hardware via a small monitoring device, allowing users to check operational statuses, schedule setback modes, set spending limits, and automate weather compensation using natural language prompts.
• 24/7 Field Tech Support: Provides installers and engineers with instant, model-specific diagnostic rules and fault-code guidance around the clock, bypassing long manufacturer hold times.

Operating on a freemium, pay-per-use credit model using "carrots," Energy Donkey reduces routine inquiry loads for manufacturers while offering real-time performance tracking, predictive maintenance alerts, and expert technical assistance.

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In this episode, Nathan speaks with Guild engineers Michael Waring (Bromley Energy) and Liam Knowles (The Heating People) about the daily realities of working on the tools in modern heating engineering. They move past surface-level talk to explore what it actually takes to run and grow a high-standard heating business today. 

Key discussion points include:

• The Recruitment Struggle: Why finding installers with the right work ethic, care, and attitude matters far more than baseline qualifications. 
• Managing the Workload: How elite installers balance surveys, admin, and on-site labor using 30-minute triage calls and AI phone receptionists.
• MCS & Accreditation Realities: Navigating certification schemes, paperwork, and quality management systems as an established installer. 
• Evolving Skills & Tech: Moving from gas boilers to heat pumps and air-to-air systems, tackling product shortages, and managing post-installation handovers. 
• The Future of Training: Rethinking traditional college apprenticeships, on-the-job learning, and where manufacturer support needs to step up. 

An authentic look into the modern heating trade directly from those doing the work every day. 

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In this episode I give a brief run down of what is currently happening in the sector. I discuss the recent Installer Show and how the Guild of Master Heat Engineers is attracting lots of attention and how many of the engineers are now offering Air to Air systems to their customers.  

I also take a look at the competence person schemes (CPS) and the online boiler ordering business models. 

I then take a bit of a deep dive into the research around online assessment. Could we be jumping out of the frying pan into the fire?   

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Episode Summary

Guests: Zac Curtis (Innovation Lead for NextGen Home at E.ON) & Chris Bernkopf (CEO of Podero)

How do you scale residential Energy as a Service (EaaS) without upfront capital? E.ON and Podero’s 18-home Midlands pilot demonstrates that combining automated zero-upfront multi-asset orchestration (heat pumps, solar PV, batteries, and EV chargers) into a single 10-year fixed tariff wrapper can achieve a +56 Net Promoter Score and stable household comfort. However, scaling this model to a broader target market of 680,000 homes depends entirely on overcoming physical installation bottlenecks, correcting widespread heat pump commissioning errors, and transitioning manufacturer software platforms from standalone thermodynamic efficiency (COP) toward predictive, time-of-use cost-curve steering.

Technical Insights

1. The Financial Architecture of Energy as a Service (EaaS)

• The core financial barrier to residential grid decarbonisation is the high upfront capital cost of low-carbon assets.
• The E.ON NextGen Home pilot addresses this by completely eliminating initial capital expenditure for the consumer. All hardware—including Vaillant heat pumps, SolarEdge solar arrays, and home batteries—is deployed at zero upfront cost.
• The asset capital paydown is amortised over a 10-year term and embedded directly into a stable, single monthly fixed tariff wrapper.
• To mitigate risk when a homeowner relocates during the contract term, the asset value is transferred to the property valuation. The incoming buyer inherits an optimised, low-operational-bill home with the initial capital pay-down effectively cleared through the house sale.
• Following the 18-home proof of concept, E.ON is planning a proactive call for entries to scale up to a representative sample of over 300 homes. This next phase will target specific home archetypes and a diverse mix of consumer behaviours to stress-test the model's mass-market viability.

2. Multi-Asset Software Orchestration vs. Standalone COP

• Traditional heating controls are built to maximise standalone thermodynamic efficiency (COP).
• In modern dynamic, time-of-use energy systems where wholesale electricity pricing fluctuates sharply between midday and evening peaks, maximising standalone efficiency is an outdated metric.
• To generate true running-cost savings, Podero’s platform bypasses physical gateways to communicate via cloud APIs directly with the assets every few minutes.
• The software engine shifts focus toward predictive cost-curve steering by calculating the exact building energy deficits and the specific thermal deferral capacity (the duration a building envelope can safely delay or store heat load without dropping interior comfort).

3. Supply Chain Quality and "Unconscious Incompetence"

• The deployment of automated multi-asset steering lives or dies on physical installation quality.
• A significant portion of the UK installation supply chain suffers from unconscious incompetence—well-meaning installers who lack the specific expertise required for low-carbon engineering.
• Common field errors, such as incorrect heat pump commissioning, frequently cause internal backup electric immersion heating rods to run continuously, driving up electricity consumption.
• Additionally, the transition of the UK heating industry into a fragmented landscape of self-employed sole traders complicates the rapid dissemination of best practices. Overcoming this requires a strict, synchronised "waterfall" installation process to handle complex asset interdependencies over a tight five-day window.

4. Expanding Beyond Air-to-Water Archetypes

• To scale the EaaS framework past the initial pilot phase toward a representative market sample of 300+ homes, utilities must look beyond standard air-to-water heat pump systems.
• To accommodate tight mid-terraced houses and flats where external space or pipework disruption prevents traditional setups, the pilot is actively evaluating alternative low-carbon technologies.
• This includes compact, single-room heat pump configurations operating without external units, localised infrared matting, low-electricity radiant solutions, and smart electric boilers dedicated to domestic hot water (DHW) production.

Industry Resources & Links

• Host Profile: Nathan Gambling, Head of Technical Education at BetaTeach and host of the BetaTalk podcast. 
• Referenced Data Expert: Mick Wall (Sheffield University), field data analyst tracking "The Holy Trinity" of integrated heat pump, battery, and solar performance telemetry. 

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Overview

In this episode, we move beyond the industry’s obsession with nominal appliance ratings to confront a uncomfortable truth: "The Phantom Efficiency." We sit down with Robert Whitney to discuss why the UK heating sector is currently failing its first major test in the transition to electrification. We explore why we continue to chase theoretical efficiency gains on a spec sheet while ignoring the systemic failure of control strategies in the real world. This is a deep dive into the engineering reality of why our heating systems remain stuck in a high-temperature, on-off cycle, and why "effective control" is the missing link between a building’s design and its actual performance.

Critical Discussion Topics

The Myth of Nominal Efficiency: Why the sector prioritises the "sticker" efficiency of an appliance over the reality of how it operates within an integrated system.

The "Lobotomised" Boiler: A technical deconstruction of why high-precision modulating boilers are being throttled by outdated switch-live logic, effectively stripping them of the very intelligence we paid for.

Transition or Stagnation? Why the shift to heat pumps is exposing the industry’s deeper reliance on "rule of thumb" design. We discuss why the lack of systemic control knowledge is one of the greatest barriers to decarbonisation.

The Path to Mastery:Why "lifelong learning" and peer-to-peer knowledge sharing—as championed by the BetaTeach ethos—are the only ways to move from phantom efficiency to verifiable performance.

Key Technical Takeaways

Beyond the Appliance: Moving the industry narrative from "the boiler is efficient" to "the heating system is optimised."

The Physics of Delta T: Robert clarifies why low-temperature flow are not just "nice to haves" but fundamental requirements for both condensing boilers and heat pumps.

Data as the Antidote: How community-driven data initiatives (like OpenEnergyMonitor) are providing the hard evidence needed to challenge institutional inertia.

About Our Guest
Robert Whitney is an independent consultant and former technical leader in the global controls manufacturing sector. With a unique background spanning legacy controls and modern startups, he brings a "no-punches-pulled" perspective on the engineering realities of our current transition.

Resources

Read the latest newsletter: The Phantom Efficiency: Why Boiler Control Strategy Has Become the First Real Test



Our thanks to the guild patrons for their continued support: CastRads, Primary Pro, UK Radiators, Payaca, Esby, and Woolsey's Renewables Centre.

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Ryan Jude of the Green Finance Institute (GFI) discusses how to mobilise capital for the UK's green home revolution.

Overview

In this episode, Nathan is joined by Ryan Jude, Programme Director at the Green Finance Institute (GFI) and former Cabinet Member for Climate in Westminster. While Nathan admits his expertise lies in the "weeds" of heat pump engineering rather than the world of high finance, the two find common ground in the necessity of making low-carbon technology the "rational economic choice" for the UK public.

From the influence of legendary guitarists like Mark Knopfler and Dave Gilmour to the intricacies of Property Linked Finance (PLF), this conversation bridges the gap between technical installation and the financial mechanisms required to scale the UK’s transition to net zero.

Property Background & The Financial Challenge

The UK heating sector is currently at a crossroads. While the "want" for green upgrades is increasing due to volatile international energy markets, the "hassle factor" and upfront costs remains a significant barrier for the average homeowner.

Ryan explains that "Green Finance" is not a separate entity, but rather a "tinge" on existing financial products—mortgages, unsecured loans, and infrastructure investments—designed to incentivise sustainable upgrades. The goal is a "Green Economy" where the distinction between green and traditional finance eventually disappears.

Key Discussion Points & Innovations

• The Evolution of Green Mortgages: Since 2019, the market has expanded from just four niche products to over 93 today, with an estimated £14 billion annually now flowing through green mortgage products.
• Property Linked Finance (PLF): Ryan introduces the concept of lending against the land rather than the individual. Based on the "PACE" model in the US, PLF allows the debt to stay with the property, lowering risk for lenders and ensuring the liability passes to the next owner if the current resident moves.
• The "Hassle Factor" vs. Interest Rates: Evidence from Scotland suggests that a 0% interest rate isn't always the primary driver for consumers. Trust, ease of the customer journey, and the "hassle" of installation are equally critical in determining uptake.
• The Strategic Partnership: GFI is currently co-running a partnership with the government’s Warm Homes Plan, involving major high-street lenders like Barclays, NatWest, and HSBC to design accessible, low-interest, government-backed loans.
• Energy as an Asset: Discussion on how the National Energy System Operator (NESO) and demand flexibility schemes are turning heat pumps, solar PV, and batteries into assets that can actually reduce monthly outgoings through smart usage.

Performance & Evidence

The impact of current geopolitical events, such as the closure of the Strait of Hormuz, has led to a measurable surge in consumer demand.

• Solar PV: Requests to major suppliers like Octopus and EDF have increased by over 50%.
• Electric Vehicles: EV demand has mirrored this uptick, as the cost-per-mile (approx. 8p at home vs. 18p at the pump) makes them the cheaper long-term choice.
• Scale: Over 27,000 solar installations were recorded in March 2026 alone—the highest in over a decade.

Closing Reflection

The transition to a low-carbon home is no longer just a moral choice; it is becoming a financial necessity. As Ryan notes, success will be achieved when the average consumer wakes up wanting the technology not because it is "green," but because it is the smartest way to protect their household from global energy volatility.

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The UK heat pump sector is entering a new phase. In this episode, we speak with senior leaders from the newly formed Association, created by merging three major industry bodies (Ground Sorce Heat Pump Association, Heat Pump Federation and Heat Pump Association) into a single, unified voice: The Heat Pump Association UK

We explore why this merger happened, what it means for installers, manufacturers, and homeowners, and whether heat pumps are finally ready to scale across the UK. From policy challenges to consumer misconceptions, this conversation breaks down the real barriers in the race to decarbonise heating.

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Nathan chats to his friend Ricky from Thoroughflush about water quality in UK heating systems. Ricky leads the way in helping domestic heating engineers prevent corrosion in their boiler and heat pump wet heating systems. 

As well as discussing the VDI 2035 method of keeping heating systems clean they two chat about Ricky's own heat pump installation. 

It's a bit similar to Nesta's 'Start at Home' scheme. 

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This episode of Betatalk features Will Rivers, associate director of residential decarbonisation at the Carbon Trust and Madeleine Gabriel, Sustainable Futures Mission Director at Nesta.

We discuss the Department of Energy Security and Net Zero's funded Heat Pump Ready Programme which was part of the Net Zero Portfolio (NZIP) and ran from 2021-2025.

The collaboration, evaluation and knowledge of this programme was managed by Carbon Trust who used the BetaTalk podcast to help share information. 

Heat Pump Ready 2 will start soon and Nathan's guests talk about the kind of innovation we might see. 

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In this episode of BetaTalk, Nathan sits down with industry veteran Graham Hendra to unpick the complexities and misconceptions currently stalling the UK’s heat pump rollout. While much of the national conversation is bogged down in rigid technical defaults and confusing marketing jargon, this discussion focuses on the practical realities of machine design, the untapped potential of air to air systems, and why the industry must change how it communicates with the general public.

Key Discussion Points:

The Engineering Reality at Haier Graham shares his journey from a refrigeration engineer to his current role at Haier, the major Chinese electronics manufacturer and a global leader in heat pump production. He discusses the unique challenge of building a better machine from the ground up, moving past the limitations of current units that simply are not good enough for the demands of the modern energy transition.

Debunking the "Fridge in Reverse" Myth A deep dive into the industry’s communication problem. Both Nathan and Graham offer a clear rejection of the "fridge in reverse" analogy often used by journalists and salespeople. They argue it is a nonsensical description that confuses consumers. Instead, they frame a heat pump as a machine where the engineer is simply interested in the hot bit rather than the cold bit of the same refrigeration cycle.

The Strategic Case for Air to Air Heat Pumps Drawing on Graham’s extensive background, there is a strong emphasis on air to air heat pumps as a secret weapon for decarbonisation. They explain why these systems are ideal for specific use cases, such as conservatories, bedrooms, or for families needing to heat a single room quickly and affordably, rather than forcing a one size fits all wet system on every property.

Installation Nuance and Electrical Standards The conversation highlights the differences in installation quality and regulation. Graham contrasts a high end, quiet installation featuring hidden pipework against minimal budget options that compromise aesthetics. He also addresses the technical nuance behind why UK regulations require fixed appliances to be hardwired, adding cost and requiring a qualified electrician compared to simpler plug in models seen on the continent.

Live at The Heat Pump Show, Newark A look ahead to The Heat Pump Show at Newark on April 22nd. Nathan will be hosting a panel featuring Graham, where they will dive deeper into the potential for air to air systems within national decarbonisation strategies and the specific sizing challenges that engineers face in the field.

Thanks to the Patrons of the Guild of Master Heat Engineers who help make these podcasts possible. For more technical deep dives visit betateach.co.uk.

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This episode discusses in lay terms the Position Paper which you can find on the betateach website and you can also download here

I speak to lots of Engineers who have apprentices at college who are not happy with the college system. 

The Betateach Position Paper argues for testing a new way of doing things. 

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In this episode of BetaTalk, Nathan welcomes back engineer and coder James Twallin to discuss the technical nuances of the UK’s energy transition. While industry debates are often binary, this conversation focuses on objective data regarding gas infrastructure, the physics of high mass heritage buildings, and the importance of real world boiler monitoring for hydronic heat pump success.

Key Topics Discussed:

• The "Invisible" Gas Leak Problem: James reveals his research into the UK’s gas network. He explains how current energy policy and EPC ratings often ignore upstream methane leaks. Using Freedom of Information data, he highlights the prevalence of leaks in ancient cast iron mains featuring 19th century archaeological engineering.
• Decarbonising Heritage Buildings: A deep dive into a 200 year old stone church project. James explains why steady state modelling fails in these environments and how a physics based approach allowed for a successful, intermittent air to air heat pump installation by leveraging the building’s thermal mass.
• Optimising Hydronic Transitions: Nathan and James discuss a new monitoring device designed to track existing boiler behaviour. By gathering data on flow temperatures and cycling, engineers can create a more accurate blueprint for future heat pump performance.

Technical Correction During the recording, a Bosch study involving 4,000 units was discussed. While mentioned as a heat pump survey in the audio, Nathan would like to clarify that the study actually monitored 4,000 gas boilers. 

Thanks to the Patrons of the Guild of Master Heat Engineers who help make these podcasts possible 

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Primary Expert: Mick Wall (IT Specialist, University of Sheffield & Founder of Energy Stats UK)

Host: Nathan Gambling (Beta Talk Podcast and Betateach Newsletter)

Core Topics: Heat Loss Accuracy, Weather Compensation vs. Room Influence, Smart Tariffs (Octopus Energy).

Executive Summary (TL;DR)

Standard MCS heat loss calculations often overestimate ventilation losses in older homes by up to 300%. Expert consumer Mick Wall demonstrates that real-world air changes in a 1930s semi-detached house are closer to 0.5 ACH (Air Changes per Hour) rather than the CIBSE default of 1.5–3.0 ACH. This episode explores how to verify heat loss using Pulse Tests and CO2 Decay to prevent heat pump oversizing.

1. Challenging MCS Heat Loss Defaults

Standard industry calculations often rely on static building guides that fail to account for the actual "tightness" of 20th-century builds.

• The Problem: Default values from CIBSE and MCS result in oversized heat pumps, leading to short-cycling and reduced efficiency.
   
• The Evidence: Mick Wall utilises three distinct methodologies to validate air change rates:
   
  1. Pressure Testing: Utilising the Build Test Solutions Pulse kit for rapid air evacuation measurement.
      
• 
  
  1. CO2 Decay Monitoring: Deploying Purrmetrix sensors to track gas dissipation over 7 days.
      
• 
  
  1. Reverse Modeling: Matching 4 years of Open Energy Monitor data against Spruce fabric loss models.
      

2. Comfort Dynamics: Weather Compensation vs. Room Influence

While "pure" weather compensation (adjusting flow temperature based on outdoor air) is better than on/off control, it often lacks the "aggression" needed for rapid recovery.

• Pure Weather Comp: Best for steady-state efficiency but may fail during sudden internal temperature drops.
   
• Room Influence: Wall advocates for this approach and currently uses his Vaillant control with Havenwise which is an optimiser.
   
• Key Takeaway: Insulation (e.g., bay window upgrades) provides "unmeasurable comfort" by eliminating drafts, even when the fabric watt-saving is minimal.
   

3. Optimising the "Elephant in the Room": Smart Tariffs

A high-quality heat pump installation must perform efficiently regardless of the tariff. However, leveraging the Octopus Energy Kraken platform provides significant cost advantages.

• Agile vs. Cozy Tariffs: Understanding how to shift loads without sacrificing comfort.
   
• The Risk: Relying on cheap overnight electricity to "mask" a poorly designed, low-efficiency system.
   

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In this episode, Nathan sits down with economist Ben Watts, the creator of the real-time energy dashboard at kilowatts.io. They explore the hidden "engine room" of the UK’s electricity system, the high-stakes market where power is traded in 30-minute blocks. 

Ben explains why a single line on the map (the B6 Boundary) is costing consumers over £1 billion a year and how technology like heat pumps and EVs are moving from being "loads" to "assets" that help keep the grid balanced.

Key Jargon Buster: The Grid Boundaries

To help listeners follow the conversation, here is a quick guide to the "pinch points" Ben mentions:

• B6 Boundary: The most critical bottleneck in the UK. It runs along the Scottish-English border.
• B4 Boundary: A northern bottleneck separating the Scottish Highlands from the Central Belt.
• The "4.5 GW" Limit: The onshore overhead cables at B6 can securely handle about 4.5 GW. When combined with the Western HVDC subsea link (2.2 GW), the total limit is roughly 6.7 GW.
• Wind Curtailment: When there is more wind in Scotland than the B6 "pipes" can carry, NESO pays wind farms to stop generating while paying gas plants in the South to turn on.

Keywords & Themes

• kilowatts.io: Ben’s dashboard for visualising real-time grid data.
• NESO: The National Energy System Operator (the new name for the system operator in 2026).
• CCGT Maintenance: Why demineralised water is essential for the steam turbines in gas power plants.
• Flexibility Assets: Using heat pumps as "virtual power plants" to respond to grid signals at 50Hz.

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In this episode of BetaTalk, I talk about a subject I am deeply passionate about marketing within the UK heating sector.

The UK has the most competitive heating market in Europe, with the highest boiler sales across the continent. In such a competitive environment, marketing plays an essential role. I reflect on how, at times, marketing messages can move away from fundamental heating science. This is not about blame or intent, but about acknowledging how commercial pressure and fast-moving narratives can influence communication.

As scrutiny of the sector continues to increase from regulators, consumer bodies, and groups examining greenwashing, these gaps are becoming more noticeable. I talk about how this scrutiny is shaping conversations across the industry, including within marketing teams and trade bodies, where there can be tension between commercial expectations and technical accuracy.

I also share why I speak about my grandfather so often on this podcast, and how his influence shaped my views on engineering, responsibility, and honesty in how we communicate technical information.

This episode is a reflective discussion about marketing, science, and integrity, and how the heating industry can continue to communicate with clarity in an increasingly examined environment.

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BetaTalk Podcast Show Notes: Air-to-Air Heat Pump Pioneering with John 

In this landmark episode of BetaTalk, the host sits down with John Ewbank to discuss his pioneering and invaluable research into the domestic application of Air-to-Air Heat Pumps (A2A HPs).

This conversation marks a potentially historical inflection point for the UK heating sector, as Ewbank’s practical, data-driven work pushes the boundaries of efficient home heating.

 🔬 The Pioneers of UK Heating

The episode highlights a crucial lineage of highly skilled, 'geeky' homeowners and engineers who have collectively advanced the understanding and adoption of low-carbon domestic heating in the UK. Ewbank’s work stands alongside the incredible efforts of figures such as:

• Mick Wall
• John Cantor
• Trystan Lee
• Glyn Hudson

These individuals have performed & shared ground-breaking real-world research, often filling gaps left by industry. 

💡 Collaboration with Nesta

A significant element of the discussion is John Ewbank's collaboration with Nesta, the UK's innovation foundation and think tank.

The host expresses great satisfaction that Nesta is engaging directly with practitioners and heating engineers like Ewbank. Their approach is highlighted as being uniquely effective among Third Sector entities in actively supporting and utilizing the crucial data generated by this community of independent researchers.

This is a vital episode for anyone interested in heat pumps, energy efficiency, and the future of UK home heating. Dive into the conversation, share it widely, and join the discussion around this incredible, pioneering work!

https://www.youtube.com/@TimAndKatsGreenWalk Have Toshiba Haori set up -  Does interesting experiments.
https://x.com/timothymortimer Daikin Stylish installed very happy
https://x.com/jimmybb - Daikin Stylish installed very happy
https://www.youtube.com/@EVPuzzle has many videos on his air to air system
https://www.youtube.com/@MrEV - other perspective installed has mixed feelings, but thinks was system design. Units were not optimally placed or sized

My initial install & experience
https://johnewbank.co.uk/what-is-the-cheapest-way-to-heat-your-home/

My experience when I lived with it for a bit.
https://johnewbank.co.uk/living-with-an-air-to-air-heat-pump-installation-and-testing-notes/

COP calculations
https://johnewbank.co.uk/airtoairmonitoring/

Guild Patrons 

PrimaryPro CastRads UK Radiators Renewables Centre

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This week on BetaTalk, we're doing something truly special: the FIRST EVER exclusive interview with EDF Heat Pumps about their groundbreaking new "Express" initiative.

EDF's new "Express" initiative is hitting the accelerator, promising faster, smoother heat pump deployments that are directly comparable to the cost of a boiler install. 

We sit down with Clay Brown from EDF Heat Pumps behind to unpack:

• What "Express" really means for installers and homeowners.
• How they're streamlining the process from survey to switch-on.
• The vision behind this bold step for #RenewableEnergy.

Sign up to the BetaTeach newsletter to view heat pump installations from engineers in the Guild of Master Heat Engineers

GUILD PATRONS:

Primary Pro

Wolseley Renewables Centre

Castrads

UK Radiators

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In this episode Nathan chats to two of the Guild Patrons, Rob Nezard from UK Radiators and Nick Baylis from Castrads about the issue of radiators being sold in the UK with overstated power outputs. 

Rob and Nick have been working with the Manufacturers Association of Radiators and Convectors (MARC) and now have the help of the Government body:  Office for Product Safety and Standards (OPSS), the National Regulator for construction products, enforcing the Construction Product Regulations. This level of government involvement is a significant development, and it validates the nearly nine-year campaign for transparency and accurate performance claims across the radiator and convector sector

Meet the Guild Patrons

Guild Patrons help support the Guild of Master Heat Engineers disseminate quality information about current good practice. Sign up to the Newsletter to see case studies from the Masters

Guild Patrons are:

Primary Pro

Renewable Centre

Castrads

UK Radiators 

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Welcome back to the BetaTalk podcast! I'm thrilled to be joined by Adam Chapman of Heat Geek for a deep dive into the buzz-generating Zero Disrupt initiative. In this episode, Adam shares the full story behind this new heat pump installation program, explaining how it aims to solve critical industry challenges, including improving affordability for consumers and giving homeowners greater choice on system efficiency. If you're keen to understand the strategy and hear what this bold move means for the evolving industry, this is a must-listen episode. 

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This episode of Betatalk features a detailed examination of a bespoke heat pump heating system designed by engineers within the Guild of Master Heat Engineers. We speak with Mark Denman of Custom Renewables and Alex Hilton, the homeowner and a wonderful guest who provides valuable insight into sustainability.

The engineers are leading heat geeks in the field, and this installation served as an excellent peer-to-peer learning opportunity for the community.

We also dedicate time to discussing Zero Disrupt, a new initiative from Heat Geek.

This heat pump podcast episode discusses the first case study on the BetaTeach website. Please click the Betateach link to view images and comprehensive details about the installation.

BetaTeach.co.uk

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Nathan is joined by Jonathan Siviter at Thermoelectric Conversion Systems (TCS), Ren Kang at Mixergy and Andreas Fechs at Kensa to discuss how innovation through the Heat Pump Ready projects has improved heat pump technology, the impact this could have on the market, and what future innovation is needed

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Nathan is joined by Zachary Gill at Energiesprong and Matthew Boyes at Hometree Finance to discuss the different innovative approaches that have been developed by Heat Pump Ready projects, the key lessons from the programme about finance models to support heat pump deployment and the insights into making finance affordable and attractive for consumers.

Disclaimer: 

All the views expressed in this episode do not represent the views of the Government or any of their departments.

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Nathan is joined by Christopher Taylor at Vital Energy, Richard Barwick at RJ Barwick and Russell Murchie at Nusku to discuss how innovation through the Heat Pump Ready projects has improved heat pump technology and the ease of installation of heat pumps in difficult to decarbonise homes, the impact this could have on the market, and what future innovation is still needed.

NEWS FLASH

The Guild of Master Heat Engineers is coming. Read more here and sign up to the newsletter

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A New Voice Meets Old Hands: BetaTalk's host Nathan, new to media, chats with his friends Joe Sharpe, Joe Dart and Andrew Gavid at Lyrical Communications

Episode Summary:

In this special episode of Trade Media Uncovered, host Nathan Gambling of the BetaTalk podcast steps into the world of long-standing trade journalism. Nathan, a new voice in the heating sector's media landscape, sits down with the pioneers who have shaped the industry's discourse for decades.

We delve into the fascinating history of trade media, from the glossy pages of published magazines to the fast-paced, digital world of today. This conversation explores how the way professionals communicate, learn, and do business has been transformed by technology. The discussion also takes a deep dive into the history of The Installer Show, the UK's largest heating and plumbing trade exhibition, and how media works alongside events and awards. We even discuss the future of AI in the industry, including the work Lorefully did with Nathan at the Installer Show.

Key Topics Covered:

• The unique role of trade media in the heating and plumbing industry, and how it has evolved from print to digital.
• A look back at the origins of trade publications, including the journey of Refrigeration News (1898) which became RAC Magazine, where our guest, Andrew, once worked before eventually joining the Installer team at Lyrical Communications.
• How the ABC Certification served as an  auditor for the circulation of print magazines.
• The pivotal shift from traditional print to digital platforms and the rise of citizen journalists and influencers.
• How media works alongside events and awards to build and sustain a community.
• We discuss the future impact of AI on the industry, and Nathan learns what the NCTJ (National Council for the Training of Journalists) is. 
• A "then and now" look at trade events, including the evolution of The Installer Show and its new counterpart, the Elemental Show.

The show also discusses the Guild of Master Heat Engineers 

Links & Resources:

• The Installer Show: https://www.installershow.com/
• The Elemental Show: https://elementallondon.show/
• BetaTeach Newsletter Signup:  https://www.betateach.co.uk/subscribe
• Lorefully AI Report: https://www.lorefully.com/cart

Call to Action:

Did you enjoy this conversation? Subscribe to the newsletter which is coming soon and will feature heat pump case studies from the Guild of Master Heat Engineers 

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Join Nathan on this episode of BetaTalk as he sits down with Olly Cutting, Johann Kühns, and Pranjal Arya from HomeTree. The team from HomeTree shares their incredible journey, from a boiler installation company to a multifaceted energy services provider. We learn how Olly and Pranjal's economic backgrounds, combined with Johann's expertise in Climate Change management and finance from Imperial College London, have shaped their innovative, data-driven approach.

The Customer Journey Flywheel

The conversation centers on HomeTree's innovative business model, structured around a "customer journey flywheel" with three key divisions:

• Home Cover: Offering service plans for boilers and heat pump installations, rivaling big players like British Gas.
• Renewable Installations: Specializing in the installation of solar, battery, and heat pump systems.
• Renewable Financing: A crucial division that helps customers overcome the significant upfront cost of new energy systems, making the transition more accessible.

This flywheel model ensures that customers are supported at every stage of their energy transition.

A Different Approach to Acquisition

Nathan and his guests discuss HomeTree's unique strategy of acquiring local SME's (Small and Medium-sized Enterprises), like the respected IMS Heat Pumps Ltd led by Emma Bohan. They explore why this approach is so beneficial for both HomeTree and the acquired businesses. HomeTree's data revealed that customers prefer working with local installers, and this acquisition model allows them to scale while maintaining a personal touch.

Beyond Technology

The discussion also highlights that the move to renewable energy isn't just a technological change; it's a behavioral shift for customers. Nathan shares his thoughts on how the Guild of Master Heat Engineers can collaborate with HomeTree to help both the company and its customers navigate this transition, building on the great conversation they started over dinner. 🍽️

This season is being sponsored by Intergas

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Join Nathan this week for an exclusive episode recorded live from the Qvantum HQ in Sweden! Nathan sits down with a team of true industry heavyweights to discuss the future of heating solutions for multi-occupancy dwellings.

In this insightful conversation, Nathan is joined by his good friend and a titan of the European heat pump sector, Thomas Nowak. As the former General Secretary of the European Heat Pump Association for nearly 18 years, Thomas shares his unparalleled knowledge of how Europe is tackling the challenge of heating decarbonisation.

We also speak with Philip Ord, Qvantum's Managing Director, and Darren Manley, the technical expert behind Qvantum's innovative solutions. The discussion delves into the intricacies of their offering, exploring the dual benefits of heating and cooling, the critical issue of overheat protection, and the technical innovations that make their systems ideal for multi-residential buildings.

This episode is a must-listen for anyone interested in the technical and strategic side of decarbonisation, from on-the-ground installers to policy makers. Tune in to hear from a leading company in the space and get a unique perspective on the European journey to a cleaner heating future.

This season is being sponsored by Intergas... check out their xylinder, a cylinder designed for heat pumps

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Expanding Horizons: BetaTalk's New Newsletter and Website!

We're thrilled to announce that BetaTalk is growing! In addition to our regular podcast episodes, we're launching a brand new newsletter and an associated website. This expansion will allow us to bring you even more in-depth content, industry news, and valuable insights into the world of heat pumps and sustainable building.

Our newsletter, launching shortly, will be your go-to source for the latest industry developments, insightful opinion pieces from the third sector, and crucially, real-world heat pump case studies from experienced engineers in the Guild of Master Heat Engineers. This is an exciting step in our mission to inform and empower.

As Chris Stark, former CEO of the Climate Change Committee, remarked about this new venture: "Nathan is one of the UK’s clean heat leaders, so I always watch him closely. This collaborative media venture is an exciting next step. We need positive voices like Nathan’s to help broaden knowledge around retrofit and heat pump installations."

Don't miss out! Be among the first to receive our new newsletter and stay ahead of the curve:

Sign up now for exclusive content and updates!

Episode Notes:

Welcome back to BetaTalk! In this fascinating episode, we delve deep into the world of air-to-air (A2A) heat pump systems for domestic properties. We were incredibly fortunate to be joined by two distinguished guests: Es Tresidder, a consultant specialising in Passivhaus design and low-carbon building design optimisation, and Michael Cosham, a seasoned HVAC engineer with 47 years of invaluable experience.

Our conversation began by exploring air-to-air systems in general, including Michael's personal experience building an A2A system for his first home on Canvey Island. Es then shared insights into the A2A system installed in his own highly efficient home, providing a real-world perspective on their performance.

We thoroughly discussed the numerous advantages of A2A systems in domestic properties, highlighting their efficiency and effectiveness. We also touched upon some perceived disadvantages, but as our conversation unfolded, it became clear that many of these concerns, such as fan speeds, comfort, noise, and even dry skin issues, may be simple to resolve with proper system setup and design. Indeed, with the right configuration, these issues may not even exist. 

For more on this, and avoiding potential pitfalls, Es has provided these insightful articles:

• About overheating in low-energy buildings: https://www.highlandpassive.com/do-low-energy-buildings-have-an-overheating-problem/
• Understanding thermal comfort: https://www.highlandpassive.com/why-do-i-feel-chilly/

A key takeaway from this episode was the remarkably low cost of A2A heat pumps, making them an increasingly attractive and accessible option for homeowners looking to embrace sustainable heating solutions.

Join us for a truly enlightening discussion that challenges preconceptions and sheds light on the true potential of air-to-air heat pump technology.

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Rhiannon and Nathan discuss the recent Installer Show 2025 at Birmingham NEC, covering current trends within the heating industry, including issues related to training.

This season is sponsored by Intergas 

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In this episode Nathan chats to his friend Ian Edgeworth, author of the recent books "Wellcome to the Wonderful world of Air source Heat Pumps - What Kept You"  and "The Pocket Guide to Low Temperature Central Heating" 

You can find the books at New Perspectives.Com

Listen to Ian's journey into teaching and what he and Nathan think of the current situation regarding heat pump training.

This season is being sponsored by Intergas who make the quality xylinder - a heat pump cylinder

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The latest episode of BetaTalk dives deep into a topic of critical importance for the future of skilled trades and green technology: the intricate world of Vocational Training Qualifications (VTQs) and how they stack up against General Qualifications (GQs).

Host Nathan Gambling, always at the forefront of heating and skills discussions, explores a key differentiator in VTQs: the expectation that ALL learning outcomes must be truly mastered for a qualification to be awarded. This isn't just about passing an exam; it's about demonstrating genuine competence.

What makes this particularly "interesting," as Nathan highlights, is the unique assessment model. Unlike GQs, the assessment for VTQs is largely devolved to the training centre, rather than solely residing with the awarding organisation (AO). However, here's the kicker: the AO remains fully responsible and accountable for the quality and integrity of the qualification itself.

This creates a fascinating dynamic. On one hand, it makes it incredibly straightforward to independently assess whether individuals have genuinely mastered every single learning outcome. If something's amiss, it's very easy to trace accountability back to the awarding organisation.

This conversation takes on even greater significance when we consider the millions of taxpayer pounds currently funding crucial qualifications, such as those for heat pump installations. With significant public investment, ensuring that these qualifications genuinely produce competent professionals is paramount.

Tune in to the latest BetaTalk episode to understand the implications of this assessment model, the responsibilities of AOs, and why robust VTQs are essential for building a skilled workforce, especially in vital sectors like renewable heating.

This season is sponsored by Intergas

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This week on the podcast, Nathan sits down with Nigel from DK Heat Recovery to discuss an innovative approach to energy efficiency.

Many businesses across the UK, like meat and food processing plants and butchers, rely on cold storage rooms kept cool by heat pump systems. These facilities also require significant amounts of hot water for their washing-down processes. Similarly, gyms use heat pump systems to maintain a comfortable temperature for workouts and need plenty of hot water for showers.

Traditionally, the heat generated by these cooling systems is simply expelled into the atmosphere, a complete waste of energy. However, DK Heat Recovery has developed a clever solution to recycle this wasted energy and use it to heat hot water.

Tune in to hear Nigel explain how the special coils in their cylinders are designed to capture the heat from the refrigerant instead of letting it escape into the atmosphere. It's a fascinating look at how businesses can become more sustainable and reduce their energy costs!

This season's sponsor is Intergas who make a great xylinder for heat pump systems

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Join Nathan's guests David & Rob from Fornax and dive into the nitty-gritty of the Boiler Upgrade Scheme (BUS) consultation and explore how third-party finance could be the key to unlocking widespread domestic heat pump adoption. We'll break down the "finance gap challenge," look at what makes third-party ownership work, and dissect the pros and cons of different financing models.

In this episode, we discuss:

• The Finance Gap Challenge: Why current BUS grants alone aren't enough for mass market adoption and how existing loan products fall short for consumers and installers.
• The Power of Third-Party Ownership: How it dramatically increases heat pump installations by offering: 
  • Superior consumer protection: If the system fails, customers stop paying, and the financer is responsible for resolution.
  • Risk alignment: Financiers are incentivized to ensure proper installation and ongoing performance.
  • Better affordability and accessibility: Eliminates large upfront capital requirements.
  • Support for installer businesses: Creates sustainable, predictable maintenance income.
• What Works: Consumer Hire vs. What Doesn't:
  • Consumer Hire agreements: The only commercially viable third-party ownership model under UK regulation. 
    • Subject to robust FCA Consumer Duty protections—not "lightly regulated."
    • Consumers have clear and simple mechanisms to keep their system; providers don't want them back!
  • Why Hire Purchase models are problematic: Despite being highlighted in the consultation, they remain commercially unworkable due to existing financial regulations.
• Consumer Protection Reality Check:
  • Consumer preference surveys don't equal deliverable products—regulatory constraints matter.
  • Consumer protection isn't free: Every additional measure either limits access to affordable heat pumps or makes them more expensive/unworkable. Duplicative measures unfairly penalize consumers.
  • Repossession rights are fundamental to risk pricing; removing them increases costs for all consumers (e.g., mortgages).
  • Maximum term limits would reduce affordability and increase financial exclusion.
  • Many proposed duplicative requirements (e.g., Ofgem doing things the FCA already does) deter small businesses and hinder independent installers.
• Innovation vs. Prescription Risk:
  • Over-prescription risks stifling innovation just as the market gains momentum.
  • Standard contract requirements could recreate past failures like the Green Deal/Green Homes Grant.

THIS SEASON IS BEING SPONSORED BY INTERGAS 

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Join us for a fascinating conversation with Mike Costain, the Managing Director of The Installer Show! In this special episode, we pull back the curtain on the UK's leading event for heating and plumbing professionals, exploring what's new, what's next, and how the show is expanding its horizons internationally.

But that's not all! Mike also shares his invaluable personal experience as a homeowner, detailing the installation and performance of his own heat pump system. He opens up about the common misconceptions and knowledge gaps within the building industry that can hinder heat pump adoption, particularly among builders who may not fully grasp their efficacy.

Crucially, you'll hear about the unique connection to this installation, as our very own host Nathan had the pleasure of arranging the engineer for Mike's heat pump installation. We delve into the journey from initial curiosity to a fully operational, energy-efficient home heating solution.

Looking ahead to this year's Installer Show, Nathan will be at the forefront of innovation, helping to run The Installer Show's groundbreaking AI platform – a first-of-its-kind initiative for the event. Mike also offers exclusive insights into the exciting developments at the show and its ambitious plans for international expansion.

In this episode, you'll discover:

• Behind the Scenes at The Installer Show: What's new, what's hot, and what to expect from the UK's premier heating and plumbing event.
• The MD's Personal Heat Pump Journey: Mike shares firsthand insights into living with a heat pump system, its benefits, and any surprises along the way.
• Tackling the Knowledge Gap: A candid discussion on how a lack of understanding among builders about heat pump functionality can impede installations.
• The Inside Story of Mike's Install: Hear how our host played a direct role in connecting Mike with the skilled engineer for his heat pump installation.
• Revolutionising the Show: Our host's role in pioneering The Installer Show's never-before-seen AI platform.
• The Installer Show Goes Global: Mike's vision for the show's international expansion and what that means for the industry.

This season is being sponsored by Intergas

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In the fourth episode of the Heat Pump Ready special bulletin series, Nathan talks to three Heat Pump Ready projects to discuss the topic of ‘Improving the customer journey’. Nathan is joined by Jack Jarvis from EDF, Gareth Robertson from Thermly and Lucy Fairchild from Oxford City Council to discuss.

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In this episode, Nathan invites Mick Wall, his 'expert consumer,' back to have a discussion with the lads from Havenwise, a company dedicated to helping with quality heat pump installations. Havenwise runs an API which optimizes the weather curves on the heat pump, as well as looking at time-of-use tariffs. You can choose to use various functionalities. For example, Mick only uses the optimizer for his space heating. Nathan likes what Henri and Alex at Havenwise are trying to achieve. Take a listen...it's a very enjoyable one!

This season is being sponsored by Intergas Heating Solutions. 

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Join host Nathan Gambling as he journeys to Intergas HQ alongside legendary heat pump engineer Steve Webster to get the inside scoop on their high-quality stainless steel hot water cylinders, specifically designed for heat pump systems. Steve shares his firsthand experience testing these cylinders on recent installations, highlighting their exceptional build quality and resilience during transportation – a welcome change from the damage often encountered with other brands.In this insightful episode, Nathan, Steve, and Intergas's Dave Hall delve into:

• The Intergas Manufacturing Process: Get a behind-the-scenes look at how these robust stainless steel cylinders are crafted, emphasising the quality and attention to detail that sets them apart.
• Unboxing Success Stories: Steve recounts his positive experiences with the cylinders arriving on site in perfect condition, a significant advantage for installers.
• Heat Pump Industry Evolution: Dave and Steve, both early pioneers in UK domestic heat pump systems, share their perspectives on the significant changes and advancements they've witnessed over the years.
• Anti-Freeze Valves: A discussion on the necessity of anti-freeze valves in heat pump installations.
• Future of the BUS Scheme & A2A Systems: Thought-provoking discussion around the potential inclusion of Air-to-Air (A2A) systems in the Boiler Upgrade Scheme (BUS) and the concerns about a potential influx of low-quality, mass installations.

Key Takeaways:

• Intergas's stainless steel cylinders offer superior build quality and are designed to withstand the demands of heat pump systems.
• Reliable delivery and undamaged products on site save time and hassle for installers.
• The heat pump industry has evolved significantly, and understanding the nuances of system design and regulations is crucial.
• The potential inclusion of A2A in the BUS raises questions about installation quality and long-term efficiency.

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Episode Description: Host Nathan dives into the rapidly evolving world of Artificial Intelligence and its potential impact on the plumbing and heating industry. Joining him are Barrie and Amrit from Lorefuly, experts in leveraging technology for the trades.

Key Discussion Points:

• The Hallucination Hazard: The trio discusses the crucial issue of Large Language Model (LLM) "hallucinations" – where AI systems confidently present inaccurate or fabricated information. This raises serious concerns about relying solely on unverified AI content.
• RAG to the Rescue: The Power of Accurate Data: Barrie and Amrit explain the concept of Retrieval-Augmented Generation (RAG) and its importance in ensuring AI provides reliable and trustworthy information. By grounding AI responses in curated and accurate data, RAG offers a pathway to creating genuinely useful resources for professionals in the field.
• Lorefuly & BetaTeach at the Installer Show 2025: Exciting news! Lorefuly and BetaTeach will be showcasing their AI-powered solutions at the Installer Show 2025 at the NEC. Find out how they are harnessing AI to benefit plumbers and heating engineers.
• OEM Opportunities: Heating appliance manufacturers can get involved in this innovative initiative! Learn how OEMs can contribute their expertise and data to create valuable AI-driven tools for installers.
• Pre-Show Webinars: Stay informed! Nathan, Barrie, and Amrit announce upcoming webinars (first one here: https://tinyurl.com/BetaTalk-AI designed to provide more details on how OEMs can participate and the benefits of getting involved.

Mentioned:

• Artificial Intelligence (AI)
• Large Language Models (LLMs)
• Hallucination (in AI)
• Retrieval-Augmented Generation (RAG)
• Lorefuly
• BetaTeach
• Installer Show 2025 (NEC)
• Original Equipment Manufacturers (OEMs)

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Nathan speaks with Leah Robson, owner of a small SME (Your Energy Your Way) installing heat pumps, batteries, and solar, about her recent appearance at Westminster. Leah gave evidence to the "Workforce Planning to Deliver Clean, Secure Energy" Committee, invited through Ellora Coupe of "Her Retrofit Space." The discussion centres on whether Leah's concerns about workforce training, particularly for heat pump installation, were understood by the committee.

Key Discussion Points:

• Westminster Testimony: Leah shares her experience presenting to the committee and her assessment of whether her points regarding the challenges faced by small businesses were acknowledged.
• The Three-Day Training Issue: The core of the episode focuses on the prevalence of three-day heat pump installation courses and Leah's concerns about their adequacy. She highlights potential issues with the depth of knowledge gained and the practical experience of some trainers.
• Heating Training Grant (HTG): Who Wins? Nathan and Leah explore the effectiveness of the HTG, questioning whether the primary beneficiaries are the awarding bodies, training centers, or the engineers themselves.
• Engineer Perspectives: Feedback from experienced gas engineers who have taken these short courses suggests the training is insufficient and doesn't adequately prepare them for real-world heat pump installations.
• Taxpayer Value: The episode raises concerns about the value for money for UK taxpayers funding the HTG if the resulting training isn't producing competent installers.

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In this insightful episode, host Nathan sits down with two key figures from the Heat Pump Association (HPA) – CEO Charlotte Lea and Chair Craig Dolan – to explore the role the HPA plays in the evolving UK heating landscape. They delve into the value the association brings to the industry, particularly as the nation transitions towards low-carbon heating solutions.

The conversation tackles the fundamental question of whether industry associations are still necessary in today's rapidly changing world. Charlotte and Craig passionately argue for their continued relevance, highlighting their crucial function in providing a unified voice for the heat pump sector and driving positive change.

A potentially contentious area is explored as Nathan raises the issue of potential conflicts of interest arising from HPA membership that may include companies also affiliated with the boiler industry and their strong advocacy for hydrogen boilers through the Heating and Hot water Council (HHIC). This leads to a nuanced discussion about navigating diverse interests within the broader heating industry.

Nathan expresses his support for the HPA's proactive new strategy focused on amplifying the voices of heat pump installers – the boots on the ground who are essential to the successful rollout of this technology.

The guests showcase the tangible benefits of HPA membership by highlighting the development and release of valuable industry resources, such as the new Residual Current Device (RCD) guidance and comprehensive heat pump system commissioning documents. 

The conversation then shifts to the complexities of the UK heating controls industry. Nathan and his guests discuss whether the competitive nature of the market might inadvertently hinder the adoption of common engineering sense and best practices in the design of energy-efficient heating systems.

Finally, Charlotte and Craig shed light on the significant policy work undertaken by the HPA, including their collaborative efforts with the Department for Energy Security and Net Zero (DESNZ). They explain how the association actively engages with policymakers to shape regulations and support the widespread adoption of heat pump technology in the UK.

Key Discussion Points:

• The core value proposition of the Heat Pump Association in the UK heating industry.
• The ongoing relevance and necessity of industry associations in the current climate.
• Navigating potential conflicts of interest with members also involved in the boiler/hydrogen fuel debate via the HHIC.
• The HPA's new focus on empowering and promoting the voice of heat pump installers.
• The importance and impact of HPA-produced technical documents, such as the new RCD guidance and commissioning documents.
• The challenges and opportunities within the UK heating controls industry and the potential impact of competition on best practices.
• The HPA's crucial policy work and collaboration with the Energy department.

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Nathan chats with Dan Large a Director at Solaris Energy. Dan has been involved with the design, installation and maintenance of heat pump heating systems for a good number of years. 

The important topic of water quality comes up and Solaris Energy use VDI 2035 methods rather than a chemical inhibitor approach. 

Dan is on the installer working group at MCS and gives insight into this process.

The episode also discusses heat pump controls and how Dan and Solaris Energy have become involved with the heat pump manufacturer Kronoterm.

This season is being sponsored by Primary Pro a professional pipe insulation system

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Welcome back to BetaTalk, the podcast dedicated to exploring the exciting world of renewable heating! In this episode, host Nathan is joined by two fantastic guests: Barry Sharp from Renewable Heat and a familiar voice to BetaTalk listeners, and Scott Sanford who has recently embarked on his own renewable heating journey.

Our conversation kicks off with a fascinating deep dive into Scott's personal experience installing a Viessmann heat pump system in his own home. We hear firsthand about his installation journey, the challenges and triumphs he faced, and the benefits he's now experiencing. This very installation was also recently featured in the SNIPEF magazine, offering a real-world perspective on adopting heat pump technology.

The episode then continues with a theme that Nathan and Barry have explored in previous episodes: the crucial role of mentorship within the heating industry. We delve into Scott's heating career, his motivations for embracing renewable technologies, and his active involvement within SNIPEF. We discuss how mentorship has potentially played a part in his journey and the importance of knowledge sharing within the sector as we transition towards a greener future.

In this episode, you'll learn about:

• Scott Sanford's personal experience installing a Viessmann heat pump system in his home.
• The key considerations and potential hurdles involved in a domestic heat pump installation.
• Insights from Scott's journey as featured in the SNIPEF magazine.
• The ongoing discussion between Nathan and Barry regarding the significance of mentorship in the renewable heating industry.
• Scott's career path within the heating sector and his role as a SNIPEF member.
• The value of knowledge sharing and support networks within the plumbing and heating community.

This season is being sponsored by PrimaryPro, a professional system for insulating heat pump pipework

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Welcome back to the show! In this episode, I'm joined by a good friend and expert in the renewable energy sector, Ken Bone from Ultimate Renewables Supplies. Ken and I dive deep into a topic that's crucial for efficient heating and the future of low-carbon homes: weather compensated heating systems.

One of the key points we explore is the apparent lack of understanding within the installer base regarding weather compensation. It's surprising, considering that condensing boilers – mandated way back in 2005 – operate much more efficiently when paired with this intelligent control strategy.

But is it fair to point the finger solely at installers? We discuss why it's arguably not their fault. Ken and I explore the possibility that industry associations haven't adequately championed and educated on the benefits of weather compensation. This lack of widespread promotion has left many installers unfamiliar with its implementation and advantages.

Our conversation then shifts to the burgeoning heat pump market. Are heat pump manufacturers doing enough to provide user-friendly and effective controls, both for the installer during setup and for the homeowner in their daily use? We examine the current landscape and consider areas for improvement.

I also share a bit about the history of the control industry, where the ideal scenario pushed by control manufacturers for many has been individual room-by-room control. However, as Ken astutely points out, this level of granular control is often unnecessary and can overcomplicate things.

We also touch on a fascinating aspect of the UK heating market: the observation that certain manufacturers are utilizing the same Chinese OEM (Original Equipment Manufacturer) for their products. This raises questions about differentiation and the potential for shared underlying technology.

A central theme of our discussion revolves around whether these OEMs could produce better weather compensation controls that also incorporate room influence. Can we achieve the best of both worlds – the efficiency of weather compensation fine-tuned by individual room temperature feedback?

Towards the end of the episode, we briefly touch upon the important topics of grid flexibility and demand-side response. We discuss how a better understanding and wider adoption of weather compensation by installers could significantly ease the transition to heat pumps and contribute to a more flexible and efficient energy system.

This episode is a must-listen for anyone involved in the heating industry, from installers and manufacturers to homeowners interested in optimising their heating systems and understanding the future of home comfort. Join Ken and me as we unravel the mysteries and potential of weather compensated heating!

This season is sponsored by Primary Pro, a professional pipe insulation system

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In this eye-opening episode, we delve into the contrasting approaches to water treatment in European domestic heating systems for corrosion prevention. While the UK predominantly champions chemical inhibitor solutions under the EN BS 7593 standard, many European nations embrace a wider range of methods. Surprisingly, some UK chemical inhibitor manufacturers who exclusively promote their products domestically readily offer non-chemical alternatives on the continent. Host Nathan interviews Ricky Prescott from Thoroughflush, who sheds light on the shortcomings of the BS 7593 standard. Ricky argues that manufacturers of chemical inhibitors often fail to provide sufficient information to accurately test heating systems and determine if adequate inhibitor levels are present. Adding to the complexity, while some of the UK's leading heating engineers favor the German VDI 2035 standard, the chemical water treatment group within the Heating and Hot Water Industry Council (HHIC) appears resistant to discussing or acknowledging these alternative European approaches.

This season is being sponsored by PrimaryPro a professional pipe insulation system

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Ever wondered what connects the discipline of a three-time Oxford-Cambridge boat race rower with the intricacies of sustainable architecture and the practicalities of installing heat pumps? This week, Nathan Gambling sits down with Henry Pelly,  an extraordinary individual who seamlessly blends these worlds. 

Our guest is a Principal Sustainability Consultant at the renowned Max Fordham, a qualified architect holding Masters degrees in Environmental Design and Environmental Psychology – a powerful combination for understanding how buildings impact both our planet and our well-being. 

We explore his fascinating career journey, which has recently taken an exciting turn with the launch of his own MCS installation company, focused on bringing efficient and eco-friendly air-to-water and air-to-air heat pump systems to domestic properties. 

Discover Henry's incredible past representing Great Britain in rowing, the demands of building a wedding venue, and the heartwarming chaos of family life with three young daughters. Join us for a captivating conversation that proves passion and expertise can truly span diverse and impactful fields.

This season is sponsored by Primary Pro, a professional pipe insulation system

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Ever wondered how heat pump systems differ between the UK and the US? In this episode, Nathan chats with Shreyas Sudhakar, a leading heat pump installer and educator from California, to explore the contrasting approaches. Nathan, who has fond memories of his time in America, and his apprenticeship on a US airbase in the UK, emphasises the strong connection he feels to the country. He and Shreyas engage in a fun discussion, highlighting the strengths of both systems and gently suggesting areas where US installations might benefit from UK insights. They both strongly believe that sharing knowledge and best practices is key to maximising heat pump efficiency and sustainability. Join us for a conversation that celebrates innovation and the potential for transatlantic collaboration!

This season is sponsored by Primary Pro a professional outdoor pipe insulation system used by top engineers in the UK

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Damon Blackmore is a massive favourite among other competent heat pump installation engineers. 

He uses social media to help other heating engineers become interested in heat pump systems and has some of the highest performing heat pumps in the country.

Unfortunately, the voices of good engineers are being drowned out by the comms pieces from much larger entities involved in the sector. 

Take a listen to someone actually at the coal face of industry...day in day out.  

This episode is sponsored by Primary Pro a professional pipe insulation system used by Damon and other great engineers.

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