Trusted Heat Pump Installers

Trusted Heat Pump Installers

This page lists heat pump installers I trust, based on how they design, install and set up low temperature heating systems.

Each has been reviewed in detail, often through full interviews, and assessed against the standards in my guide to choosing a heat pump installer.

There’s also some context on what has gone wrong in the past with heat pump installations, why things are improving, and how the installers on this list have been selected.

This list will grow over time as I interview more installers and review more systems, but I’d rather start with one or two that I trust than publish a longer list of those I don’t.

Why Trust This List?

Everything here is based on real-world data, detailed interviews with installers, and how systems actually perform in homes like mine.

I’ve been on a renewable journey in my own home since 2018, running Energy Stats UK since 2019 and living with our Vaillant heat pump since 2022.

Along the way I’ve completed Heat Geek training, host the Energy Unwrapped podcast, and run my own YouTube channel.

All of that gives me a clear view of what good and bad heat pump installations actually look like in the real world.

Octopus Energy Heat Pumps

Best for:
Standard homes, straightforward installs, and people who want a simple end-to-end process

What they do well

• Competitive pricing driven by scale
• Clear process from quote through to install
• Strong focus on real-world performance data
• Standardised system design (typically around 50°C flow temperature)

Things to be aware of

• Early quotes can differ from final design after survey
• Standard approach may need adapting for more complex homes

👉 Full breakdown:
/trusted-heat-pump-installers/octopus-energy/

👉 Get £100 Octopus heat pump referral:
https://tech.referrals.octopus.energy/ucMTeP8d

Damon Blakemore

Damon is the installer behind my own 5kW Vaillant heat pump system and 250L Mixergy cylinder, installed in October 2022.

His work is a good example of a properly designed, low temperature heating system, with a strong focus on getting the fundamentals right.

Best for:
Homes that need a more tailored design, or where performance and system optimisation matter

What he does well

• Bespoke system design rather than a one-size-fits-all approach
• Strong focus on low temperature heating and correct system setup
• Attention to pipework, flow rates and emitter sizing
• Follows best practice standards including VDI 2035 water quality
• Proven real-world performance (including my own system)

Things to be aware of

• More bespoke approach, so not the cheapest option
• Limited availability compared to national installers

👉 View my system performance:
https://energy-stats.uk/heat-pump-performance-history/

👉 Learn more about water quality (VDI 2035):
https://energy-stats.uk/energy-unwrapped-podcast/water-quality-in-heating-systems-thoroughflush/

👉 Find Damon online:
http://blakemoreplumbingandheating.co.uk/
https://uk.linkedin.com/in/damon-blakemore-313a01145
https://www.instagram.com/damon_bphr/

Heat Geek assured installer, Gas Safe registered, Water Safe and APHC member. Heating Installer Awards Yorkshire & Humber winner (multiple years).

Why heat pump installs go wrong (and why that’s changing)

An efficient, low temperature heating system like a heat pump isn’t just a box on a wall.

In a way, it’s a whole house maths problem.

With older gas boiler systems, you could often get away with a bit of guesswork. Oversized boilers and high temperatures to the radiators could overcome most pipework sizing issues and still get the house warm.

The system would blast heat, reach room temperature, switch off, then repeat.

Heat pumps work differently. They perform best when gently trickling lower temperature heat into radiators or underfloor heating over longer periods.

If you want a simple explanation, I’ve covered that here: Heat Pump Performance for Normal People.

Most of the horror story heat pump installs you read about come down to one thing: a lack of education.

The installers putting those systems in didn’t fully understand the maths behind low temperature heating. And that usually showed up in one or more of the following:

• Inaccurate heat loss calculations (whole house and room by room)
• Incorrect heat pump sizing
• Pipework that can’t handle the higher flow rates
• Radiators or underfloor heating not sized for lower temperatures
• Poor use of weather compensation, where the system should match heat output to heat loss based on outdoor temperature

Things have improved

Installers and companies are starting to understand this properly.

Because of that, you don’t need a maths degree or to do all the research yourself.

You can leave the design and calculations to them, and focus on the outcome: a system that works properly.

The aim of this Trusted Heat Pump Installer list is to reflect that. To highlight installers who do understand these requirements, and who design systems based on proper calculations rather than guesswork.

These are companies I’ve either interviewed in detail or reviewed closely. They’re challenged on how they design and install systems, not just what they sell.

Every installer listed here is one I trust to meet the standards set out in my guide: How to Choose Heat Pump Installer

How These Installers Selected

These aren’t paid listings.

To appear here, installers need to show they follow the same principles I cover in my guide:

• Proper whole house and room-by-room heat loss
• Low temperature system design (not just swapping a boiler)
• Correct pipe sizing and flow rates
• Minimal use of buffers and unnecessary complexity
• Clear commissioning process
• Evidence of real-world performance where possible

Most of these come from long-form interviews on the podcast, where we go into the detail properly.

Yes, there are referral links for some installers where I claim some commission, but none on the installers here are listed just for the money

Summary

This list will grow over time as I interview more installers and review more systems, using the same approach of real data, detailed conversations and system design.

Keep an eye on future Energy Unwrapped Podcast episodes.