Endorsed by Which?

Fornax Energy Ltd

4.9

4 Reviews

Opening Hours
Today - 09:00–17:00
  • Monday 09:00–17:00
  • Tuesday 09:00–17:00
  • Wednesday 09:00–17:00
  • Thursday 09:00–17:00
  • Friday 09:00–17:00
  • Saturday - Closed
  • Sunday - Closed

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About

Fornax is a UK-wide renewables company specialising in air source heat pumps and flexible financing that makes upgrading to a super-efficient, low-carbon heating system genuinely affordable.

We believe a great heat pump installation is only as good as the engineer fitting it. That's why we hand-pick every installer on our network — choosing skilled professionals who share our standards for quality, workmanship, and customer care. We don't take on volume for the sake of it; we partner with engineers whose values match ours.

From your first enquiry through to aftercare, our goal is simple: a smooth, transparent process, a system sized and installed properly the first time, and heating bills you can actually plan around.

Whether you're moving away from oil, replacing an ageing boiler, or future-proofing your home, we'll help you understand your options, your funding routes, and what the right system looks like for your property.

What we do

  • Renewable energy

    • Heat pumps
    • Home energy analysis
    • Air source heat pumps

Customer reviews

Why you can trust these reviews

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How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

4.9
4 reviews
Customer Service
5.0
Quality
4.8
Value
5.0
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Endorsement Reference
Customer Service
Quality
Value
We had solar panels installed. Service was really good from start to finish, from design through to the installation and then post installation support. All has gone well, just the normal fine tuning, which was expected anyway. I received all the certificates that were required and proposal handover pack. Have already recommended them to a neighbour who is looking to get a similar job completed at their home.
Which? Trusted Traders Consumer Posted on 11/05/2026 , work completed 30/09/2025
Endorsement Reference
Customer Service
Quality
Value
I had a full heating survey done before having a heat pump installed. They changed 6 radiators and did a full upgrade to the heating system. The pre-work engagement was very good, answering all the questions about what to expect. The work was carried out to a high standard, and any snagging was handled by Fornax, enabling me to deal with only one party and get a high-quality engineering view on the fix.
Which? Trusted Traders Consumer Posted on 11/05/2026 , work completed 28/10/2024
Endorsement Reference
Customer Service
Quality
Value
The traders were very good and friendly. We had all new radiators and a Heat Pump fitted, water tank moved into the loft.
Which? Trusted Traders Consumer Posted on 11/05/2026 , work completed 23/06/2023
Endorsement Reference
Customer Service
Quality
Value
Fornax organised the installation of an heatpump systemic my house and provide ongoing support for maintenance and performance. My house is very old and I had no central heating - this made the installation complicated. Fornax coordinated the installation and commissioning of the system and without their work this would have not been successfully been completed. Sam in particular contacted me regularly to confirm how things were going and to offer support for any trouble shooting. Having this support made the whole process much less stressful and helped me with any technical questions on the system. Having someone in my corner for installing and using a heatpump who knows the technical side was really important and has meant that the system runs efficiently today. I found this especially useful because my heat pump was on a difficult property (old, no existing radiators) and it wasn't always straightforward. The ongoing support has been excellent and whilst I haven had any problems, knowing I have support available is really reassuring. I have found that the support has been personal and you aren't just a number in their system because they aren't a mass volume company. Would highly recommend them for anyone considering a heatpump.
Which? Trusted Traders Consumer Posted on 11/05/2026 , work completed 29/05/2025