21 Degrees Reviews 118

From the initial consultation and design to final handover, the 21 Degrees team were knowledgeable, professional, and clearly experts in low-energy home design. Highly recommend.

A really great experience from survey through to handover. The on site team were very quick and efficient at installing and commissioning the system. I had solar panels and a Tesla battery put in, as well as an Eddi water heater. The team were knowledgeable, polite, diligent and tidy workers. The system itself has been brilliant with no faults or issues at all in the month since installation. 21 Degrees were easy to communicate with and there was none of the nonsense that you might get with some of the less scrupulous traders out there. I would highly recommend 21 degrees for your solar and battery installation, and I would consider them first for any further electrical work that I may need in the future.

Fast delivery on airtightness products meaning it didn't hold up the work I was doing. Would buy from them again.

Great experience with 21 Degrees. They clearly understand how to make homes energy efficient. Helpful advice and solid expertise. Would definitely recommend.

I found dealing with the company very easy and receptive to our requirements, both for the windows and MVHR system.
The back up and spares dept where very efficient.
I would recommend them to all.

Thanks to 21 degrees for a brilliantly-designed MVHR system that quietly does its magic - keeping the house full of fresh filtered air and eliminating moisture and mould from the house. Its heat exchange properties mean that you're not losing heat from house to ventilate. The metal pipework looks beautiful as well! The team at 21 degrees were consummate professionals and have responded quickly and efficiently to all enquiries. Highly recommended!

The specialist items I needed delivered on time. Only grumble is what seems a high delivery charge on a small order.

Their design was spot on as we had some difficult areas to overcome. They were helpful and professional and responded quickly. a great service all round for this project. Thank you

VG- used more than once very good service
insulation was exactly what I needed and arrive promptly

Very knowledgeable, post sales support has been excellent.

The 21Degrees installed roof solar panels, battery and associated electrics for me. Scaffolding was also arranged by them. Team arrived promptly on the day and completed the installation to an excellent standard, they was also happy to move a water pipe to provide an ideal location for the battery at no extra cost. I found 21 degrees to be excellent value for money compared to other quotes. Really impressed with the team from start to finish. Would definitely recommend them for similar work.

awesome product, and awesome customer service. Thank you.

Great communication both ways with this company, extensive specialized knowledge in the field of highly energy efficient building components.
And I have had triple glazing installed by them, and extremely happy.

All staff from sales, office and fitters where helpful and friendly and easy to work with
Products are excellent as well

The 21 deg team are very knowledgeable & provide excellent support & advice about the low energy products they sell, which are some of the best available on the market. They are our first port-of-call when sourcing window & doors, air-tightness products & MVHR systems.

In January 2025 my solar panels stopped working. These had been installed by Go Eco in 2020 and this was the first problem I had incurred. After two engineer visits it was deemed I needed a replacement part which they were going to order and replace as a matter of urgency, since then I have heard nothing I have rang and they never answer the phone, I have left messages and nobody responds, I have sent emails and no replies, I contacted several people higher up than the service team and they didn't respond either. I also paid upfront for 7 years service contract and have had 5 up to now and since the service team has vanished and there is no way of contacting them I don't hold much hope of getting the last two years service done. Therefore I would definitely not recommend this company to anyone which is a shame because Go Eco under John Gilham had an excellent service, the customer service is none existent now.

I recently contacted 21 Degrees for advice on installing a heat pump, solar panels, and a battery system at my property.

Although I’m outside their installation area, the person I spoke to was incredibly polite and took the time to answer all my questions in detail. They even gave me some helpful tips on what to look for when choosing a local installer. It's rare to come across a company so willing to help, even when there's nothing in it for them.

Based on this experience, I would highly recommend 21 Degrees as a knowledgeable and trustworthy company.

I got in touch with 21 Degrees to ask about their windows and MVHR systems. I'm not quite ready to place an order yet, but after speaking with the team, I will definitely be returning to them when the time comes. They clearly know their stuff.

After originally using go eco (amazing service and company), it seems this 21 degrees have bought them out.
I am having trouble with a noisy heat pump, I can’t sleep with the window open as too loud and my neighbours have mentioned the same. Took weeks for anyone to get back to me, they came out and said they needed to buy a devise that records the level of volume and would be back in touch. Over 6 week later with emails and calls not responded too I am still non the wiser!
Not sure if it is because I was originally from another company or because I’m not buying something from them, but the service is the poorest I have ever experienced! So many more companies that provide this sort of equipment, I suggest you look for a different one if you want any after sale service at all!