I built a passive house. 21 degrees, fitted the windows and doors, and designed and supplied the MVHR system. These are two different teams, but in both cases, the experience with working with 21 degr... Voir plus
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Lisez les avis des autres
Very happy with my experience with 21 degrees - the solar panel setup is working really well for us. They were a pleasure to work with and made it easy to move through the process. The only caveat is... Voir plus
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Knowledgeable and keen staff. Fitting triple-glazed windows for the whole house, and they all wanted to get the job done, and didn't look for excuses when things got difficult. I would say the only t... Voir plus
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We used 21 Degrees for our heat pump installation and underfloor heating connection. They did exactly what they promised, stuck to the timelines, and met every expectation. There were a few issues... Voir plus
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À propos de l'entreprise
Écrit par l'entreprise
Our world is changing. We believe now is the time to adapt and so we're pioneering a new future. Our mission is to empower homeowners, architects, and businesses with the knowledge and technology to harness their own sustainable energy and help safeguard the planet. Whether you need a single product or the ultimate Passivhaus, your system needs to be well thought out and designed correctly. We adopt a full-circle approach to provide better performing buildings from a carbon, cost, and comfort perspective to get you the right outcome. Our specialist products and services include renewables such as solar panels and heat pumps, and energy efficient upgrades such as triple-glazed windows and doors, mechanical ventilation with heat recovery (MVHR) systems, and insulation and airtightness products.
Coordonnées de contact
Royaume-Uni
- 0808 281 5021
- info@21degrees.com
- 21degrees.com
4,4
Excellent
109 avis
A répondu à 87 % de ses avis négatifs
Répond généralement dans un délai de 48 heures
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Réponse : 21 Degrees
We’re really pleased to hear everything arrived promptly and met your expectations.
If we can help with anything else in the future, just let us know!
Knowledgeable, friendly, and attentive.
I built a passive house. 21 degrees, fitted the windows and doors, and designed and supplied the MVHR system. These are two different teams, but in both cases, the experience with working with 21 degrees is very positive. The guys are knowledgeable and super helpful and have helped us throughout the whole Passive House process. I'd highly recommend them.
31 mars 2026
Réponse : 21 Degrees
Thank you so much for your kind words and for taking the time to share your experience. It was a real pleasure being part of your Passive House journey.
We’re delighted to hear that both our windows and doors team, as well as our MVHR design team, were able to support you effectively throughout the process. Creating a Passive House is a big undertaking, so it’s great to know you felt well supported every step of the way.
Your recommendation really means a lot to us. Wishing you many years of comfort and performance in your new home!
Very happy with my experience with 21…
Very happy with my experience with 21 degrees - the solar panel setup is working really well for us. They were a pleasure to work with and made it easy to move through the process. The only caveat is they tend to quote high (all-in batteries etc. ), we worked down to what was more reasonable given our situation.
16 avril 2026
Avis spontané
Réponse : 21 Degrees
Thank you for the great feedback - we’re really pleased to hear your solar panel system is performing well and that you found the process smooth and easy to navigate.
We appreciate your honest comment on pricing too. Our initial proposals are designed to give a complete picture of what’s possible (including options like battery storage), but we’re always happy to refine things to suit individual needs.
Thanks again for choosing 21 Degrees
A good experience
The engineer was on time. He was pleasant and helpful and thoroughly cleaned the unit. Because it was so clean when he arrived, he recommended that the next service be planned for 3 years time.
25 mars 2026
Avis spontané
Réponse : 21 Degrees
Thank you for your kind feedback - we’re really pleased to hear you had a good experience.
It’s great to know our engineer was punctual, helpful, and carried out a thorough clean. We also appreciate you maintaining the unit so well; it’s exactly what helps keep everything running efficiently.
Knowledgeable and keen staff
Knowledgeable and keen staff. Fitting triple-glazed windows for the whole house, and they all wanted to get the job done, and didn't look for excuses when things got difficult.
I would say the only thing that could have helped is if they chatted to our on-site builder & joiner before starting work, to get the 'lie of the land'.
17 février 2026
Réponse : 21 Degrees
Thanks for your review - we really appreciate it! Great to hear the team’s knowledge and determination stood out during your triple-glazing project.
We also appreciate the note on coordinating with your builder and joiner - that’s really helpful feedback and something we’ll improve on.
Thanks again for choosing us!
Very knowledgeable engineer
Punctual, very knowledgeable and went over and above to sort all our heating issues. Will only use these guys from now on. Thank you!
18 mars 2026
Avis spontané
Réponse : 21 Degrees
Thank you so much for your kind words! We’re really pleased we could get everything sorted for you and that you felt well looked after. It means a lot to hear that our team’s knowledge and effort made a difference.
We truly appreciate your support and look forward to helping you again whenever you need us!
Heat pump installation - great service
Great service from start to end of our heat pump installation. Brilliant on site team, particular shout out to Josh, such a hard working engineer, polite and always ready to answer the (101!) questions we asked.
2 mars 2026
Avis spontané
Réponse : 21 Degrees
Thank you so much for your kind words! We’re delighted to hear you had a great experience from start to finish with your heat pump installation.
A special thank you for mentioning Josh - we’ll be sure to pass on your feedback. He’ll be really pleased to hear how much you appreciated his hard work and patience in answering all your questions!
As a customer who recommended this…
As a customer who recommended this company to quite a few neighbours and gave them more business, I would no longer recommend this company to anyone. If your battery breakdown it’s no longer their problem. Our battery has been broken for the past 8 months, failing a replacement in November and we are supposedly getting another replacement in March. No compensation or exchange for a different brand. You are on your own to sort it out with the battery company. They will only provide their customer service until the installation and will provide the worst service you will ever experience if your battery fails. If I could give 0 stars I would for the stress and disappointment they caused us for the past few months.
27 février 2026
Avis spontané
So impressed....
From the very first survey I was so impressed with 21 degrees. David was incredibly helpful and knowledgable to guide me through the best tailored option for my new build property. The team carrying out the work were amazing, incredibly diligent and super neat, the finish is far better than I had anticipated. I would highly recommend Matt & his team for anyone considering solar.
27 février 2026
Avis spontané
Réponse : 21 Degrees
Thank you for such a lovely review. We’re delighted to hear that your experience with 21 Degrees has been positive from the very first survey. David will be really pleased to know his guidance helped you find the right, tailored solution for your new build. It’s also great to hear the installation team impressed you with their diligence, neatness and high-quality finish. We’ll be sure to pass your kind words on to Matt and the rest of the team. Thanks again for the recommendation – it really does mean a lot.
Excellent service and installation of solar system
Excellent service and installation of our solar panels, battery and EV charger. Process was well explained and the team worked hard to get everything installed in really miserable weather.
30 janvier 2026
Avis spontané
Réponse : 21 Degrees
We’re really glad to hear you were happy with the installation of your solar panels, battery and EV charger. It’s great to know the process was clearly explained and that the team’s hard work came through – even in such challenging weather!
Thanks again for choosing us, and for taking the time to share your experience.
Time was taken to answer my queries re…
Time was taken to answer my queries re the MVHR amd the service appeared to be very thorough, including changing the kitchen filter.
5 janvier 2026
Réponse : 21 Degrees
Thank you for your review ⭐️
We’re pleased to hear that the team took the time to answer your questions about the MVHR system and that the service felt thorough. Making sure everything is properly checked – including things like changing the kitchen filter – is an important part of keeping your system running efficiently.
Thanks again for taking the time to share your experience.
Contacted 21* 4 weeks ago as heating…
Contacted 21* 4 weeks ago as heating system had failed and not working. Sent several emails and left phone messages without any response. Sadly will never use again. Annual service was okay but no report left or received since
5 février 2026
Avis spontané
Réponse : 21 Degrees
We’re really sorry to read this and to hear about your experience - particularly when your heating system had failed. That’s exactly when you should be able to rely on us, and we apologise that you didn’t receive a timely response.
We’re also sorry to hear you didn’t receive a service report following your annual maintenance. That isn’t the standard we aim for.
We take this feedback seriously and are reviewing our internal processes around call handling, email responses and service documentation to ensure this doesn’t happen again. If you’re open to it, we would welcome the opportunity to look into this properly - please contact us directly with your details so we can investigate what went wrong.
Again, we’re very sorry for the frustration this has caused.
⭕ The 21 Degrees Team.
I took out a 7 year maintenance…
I took out a 7 year maintenance contract in about 2018. Every year the previous two versions of this company came in October to service my heat pumps. In 2024 they didn’t turn up - said they sent an email to arrange to come, got no reply and then did nothing. I was away sailing for a year and I didn’t spot that they hadn’t been. I didn’t hear anything from them throughout 2025. In January 2026 I realised they hadn’t been in 2025, and on checking back they hadn’t been in 2024. So paid for 7 years maintenance in advance and for no reason at all didn’t fulfill their contractual obligation until I chased them several times, coming in Feb 2026, after no maintenance for almost 2 and a half years.
At best the whole process was mid managed, at worst it’s just avoiding doing work they’ve already been paid for.
No problem with the work that was eventually done - the guy that came to do the work was great.
Probably not a great idea to then mither me for a review.
5 février 2026
Avis spontané
Réponse : 21 Degrees
Thank you for taking the time to leave us a review - we’re genuinely sorry for the frustration this caused. You’re absolutely right to expect a paid maintenance contract to be fulfilled proactively, and in this instance we fell short of the standard we aim to provide.
We appreciate you acknowledging the quality of the work once it was completed, and we’ll pass on your kind words to the engineer who carried out the service. However, that doesn’t negate the fact that the lack of follow-up and communication over that period was unacceptable.
We’ve taken your feedback on board and are reviewing our maintenance scheduling and customer communications to ensure this doesn’t happen again. Thank you for raising it, and again, our apologies for the inconvenience caused.
⭕ The 21 Degrees Team.
Highly recommended
Very professional, courteous team all round. In spite of a few challenges with the house footprint, the installation team (Szymon, Brian,Kris, Guy & Dave)worked through the issues & were extremely helpful in making sure I was happy with the final outcome. Would certainly recommend
10 février 2026
Avis spontané
Réponse : 21 Degrees
Thank you so much for taking the time to leave such a positive review. We’re really pleased to hear you found the whole team professional and courteous, and we’ll be sure to pass your kind words on to Szymon, Brian, Kris, Guy and Dave.
⭕ The 21 Degrees Team.
Great company from initial enquiry
Great company from initial enquiry, design and through to delivery of goods then subsequent commissioning of the MVHR system.
22 septembre 2025
Réponse : 21 Degrees
Thanks for the great feedback Gary.
We’re glad the commissioning went well and that the system is up and running. If you ever need anything else, we’re just a phone call away.
⭕ The 21 Degrees Team.
Fantastic product and experience
Great communication through the design process. A daunting amount of components arrive but the instructions very quickly put you at ease with everything fitting together beautifully. I also managed to lose my instructions so reached out to see if by any chance they were still on record and had them in my inbox within 10 minutes. Great service and a friendly team!
15 janvier 2026
Avis spontané
Réponse : 21 Degrees
Thank you for the 5-star review, Dean!
It’s great to hear that our team was able to assist you within minutes.
We're glad the assembly went smoothly and that everything fit 'beautifully.' We appreciate your support!
⭕ The 21 Degrees team.
Solar `Panels and Tesla Powerwall Installation
We had solar panels and a Tesla Powerwall 3 installed by 21 Degrees and the whole experience was exceptional from start to finish. They later returned December 25 to install a second battery as well, and it was just as smooth and professional.
What really stood out was the people. Every member of staff we dealt with went the extra mile — knowledgeable, professional, friendly, and clearly proud of the work they do. They took time to explain everything properly, answered all our questions patiently and made what could have been a complex project feel straightforward and well-managed. A special call out for Natalie J., who consistently went the extra mile. Thank you.
Everything has been very reliable and has worked exactly as expected. The installation was neat, efficient, and clearly done to a high standard. Communication throughout was excellent, timelines were met and there were no surprises.
It’s rare to find a company where the technical quality and the customer service are both this good. I wouldn’t hesitate to recommend 21 Degrees to anyone considering solar or battery storage.
18 décembre 2025
Avis spontané
Réponse : 21 Degrees
Hi Dan,
Thank you so much for taking the time to share such a detailed account of your experience with us. We're absolutely thrilled to hear that your solar and Powerwall 3 installation and the subsequent battery addition, went so smoothly!
It’s particularly wonderful to hear that our team’s passion for their work shone through. We truly believe that technical excellence should always be matched by great communication. I will be sure to pass your kind words along to the entire crew, and a special thank you to Natalie who will be delighted to know she made such a positive impact on your project.
Coming out on December 25th is all part of our commitment to getting our customers powered up, and we're glad we could make that second installation just as seamless as the first.
Thank you for recommending 21 Degrees. We’re proud to have played a part in your transition to sustainable energy!
Warm regards,
⭕The 21 Degrees Team.
Very clear and professional
Very clear and professional. Richard did a thorough check of everything and was able to explain the system and ensure controls were set to optimised settings
23 janvier 2026
Avis spontané
Réponse : 21 Degrees
Thank you for the 5-star review! We are glad Richard could provide a professional experience and help you get the most out of your system settings. We appreciate your business and look forward to working with you again.
⭕ The 21 Degrees Team.
Very helpful and prompt service.
1 novembre 2025
Réponse : 21 Degrees
Thank you Andy 🙌
⭕ The 21 Degrees Team.
Réponse : 21 Degrees
Thank you for leaving a review Liam, we're thrilled you're happy with our product.
⭕ The 21 Degrees Team
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