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... Toon meer
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21 degrees installed my solar system and were great. A year later mice ate some cables and the sent someone out to fix my system within a couple of days which was great service too
Bedrijf heeft geantwoord
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... Toon meer
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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... Toon meer
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Bedrijfsgegevens
Geschreven door het bedrijf
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.
Contactgegevens
Verenigd Koninkrijk
- 0808 281 5021
- info@21degrees.com
- 21degrees.com
4,4
Uitstekend
118 reviews
Heeft 83% van zijn negatieve reviews beantwoord
Reageert doorgaans binnen 48 uur
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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 februari 2026
Review zonder uitnodiging
Antwoord van 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 februari 2026
Review zonder uitnodiging
Antwoord van 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 februari 2026
Review zonder uitnodiging
Antwoord van 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 september 2025
Antwoord van 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 januari 2026
Review zonder uitnodiging
Antwoord van 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 december 2025
Review zonder uitnodiging
Antwoord van 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 januari 2026
Review zonder uitnodiging
Antwoord van 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 november 2025
Antwoord van 21 Degrees
Thank you Andy 🙌
⭕ The 21 Degrees Team.
Antwoord van 21 Degrees
Thank you for leaving a review Liam, we're thrilled you're happy with our product.
⭕ The 21 Degrees Team
Antwoord van 21 Degrees
Thank you for the lovely feedback. We’re glad you felt well supported and that we could adapt as your needs changed.
⭕ The 21 Degrees Team
Great service call
The company has changed hands since they installed our Heat Pump in 2021, but the latest annual service was the best yet.
The engineer was helpful and friendly and made a few settings changes which will save me a few quid each year.
16 januari 2026
Review zonder uitnodiging
Antwoord van 21 Degrees
Thank you for sharing this - we really appreciate you taking the time to leave a review.
It’s great to hear that your latest annual service was such a positive experience. Our engineers take real pride in not just servicing systems, but helping homeowners get the very best performance and efficiency from them, so we’re pleased those setting adjustments will make a difference for you.
Thanks again for your feedback and for continuing to trust us with your heat pump care.
⭕ The 21 Degrees Team
Replacement windows in period property
We wanted replacement doors and windows for our C17th house that would be sensitive to a character property, yet deliver very low U values (All their products are trpple glazed). We also wanted a design and install service. Having researched the market for this type of product, we decided that 21 Degrees was the only company to meet our criteria. They have been a pleasure to deal with, especially around snagging and post-sales support. If you value quality above price, this is probably the company for you.
1 mei 2025
Review zonder uitnodiging
Antwoord van 21 Degrees
Working on a C17th property is always a privilege, and we’re really pleased we could help you achieve the right balance between preserving character and delivering modern, low U-value performance with triple glazing. Design, installation and aftercare are all equally important to us, so it’s great to hear that our team - especially around snagging and post-sales support - made a positive impression.
We truly appreciate your trust in us and your kind words about the quality of what we do. It was a pleasure to work with you.
⭕ The 21 Degrees Team
Slow to respond - unsatisfied customer
Booked to investigate a fault on our heat pump and had a service at the same time which wasn’t cheap! The Engineer could not find a fault with the heat pump but it failed again the following day. 21 degrees took a week to respond by which time we’d lost faith in them and used someone else to diagnose and repair the heat pump which turned out to be a common and easy to diagnose issue.
I wouldn’t use them again.
4 december 2025
Review zonder uitnodiging
Antwoord van 21 Degrees
Dear Mr. Fisher,
Thank you for taking the time to leave your feedback and for sharing your experience with us. We're sorry to hear that you were disappointed with the service you received, particularly with the response time and the overall outcome.
We always aim to provide prompt and reliable support for our customers.
If you'd be open to it, we'd genuinely appreciate the opportunity to discuss this further and see if there's anything we can do to make things right.
Your feedback is appreciated,
⭕ The 21 Degrees Team.
Outstanding After Sales Service for MVHR
Outstanding after sales service, thank you! 🤩 Our MVHR unit developed an error code after a couple of years. A temperature sensor was showing as faulty. The office support team were great and Richard/Rick the engineer rang and talked us through his thoughts about what might be causing it. (A corroded wire since that side of the unit is exposed to the incoming elements.) He explained how to remove the front panel, access the sensor, check/repair the wire and generally give an internal clean up. He was spot on with his advice and I was able to get the unit back up and running without an engineer call out. He did also offer to talk us through the process in real time on the phone, if we needed it. What a total star!
14 januari 2026
Review zonder uitnodiging
Antwoord van 21 Degrees
Thank you so much for the 5-star review! We're thrilled to hear that you’re back up and running.
It’s great to know that Richard’s advice hit the spot, he really is a star and we’ll be sure to pass your kind words on to him and the team.
We take a lot of pride in our after-sales support, and we’re glad we could help you resolve the sensor issue yourself without the need for a full call-out.
Thanks for choosing us for your MVHR needs!
⭕ The 21 Degrees Team.
Pete who did our service was very…
Pete who did our service was very efficient and knowledgeable. He was very thorough and left everywhere clean.
13 november 2025
Review zonder uitnodiging
Antwoord van 21 Degrees
Thank you for your review Susan!
It's great to hear that Pete delivered such efficient, knowledgeable, and thorough service, and that he left everything spotless afterwards. Our engineers take real pride in doing a proper job, so feedback like yours makes our day.
⭕ The 21 Degrees Team.
Excellent response time and service.
Response time, diagnosis and fix were excellent. Our air source heat pump decided to stop working overnight. 21 degrees provided a 1st class service and within a couple of hours of contacting them the fault was identified and fixed.
11 december 2025
Review zonder uitnodiging
Antwoord van 21 Degrees
Thank you so much for taking the time to leave such a kind and detailed review! We're delighted to hear that our team was able to get your air source heat pump back up and running so quickly.
We're grateful for your continued trust in 21 Degrees and look forward to supporting you with any future needs. If there's anything else we can assist with, please don't hesitate to get in touch.
⭕ The 21 Degrees Team.
Heat Pump and UFH
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 during the process absolutely normal due to the complexity of the work, but they fixed everything quickly and professionally, making the whole process stress free.
Tom, Josh, Matt, Dan, Alfie and Charlie were all brilliant — skilled, friendly, and easy to have around.
Highly recommend, and we’ll definitely use them again in the future.
15 oktober 2025
Review zonder uitnodiging
Antwoord van 21 Degrees
Thank you so much for taking the time to share this fantastic review. We’re delighted to hear that your heat pump installation and underfloor heating connection were completed on time and met your expectations.
With projects of this complexity, the occasional issue can happen, so it’s great to know the team resolved everything quickly and professionally, keeping the experience stress free.
Tom, Josh, Matt, Dan, Alfie and Charlie will be thrilled to hear your feedback — they’re a dedicated group and your recognition means a lot.
We really appreciate the recommendation and would be more than happy to support you again in the future. Thank you for choosing 21 Degrees!
Good but poor organisation in ordering
Windows seem very high quality but terrible organisation in the ordering process. We ended up with windows with completely different glazing bar configurations. Although this was shown on the quote it was far from obvious as each window is on a different page. 21 should really be checking and providing some elevations or even just summary picture of windows beside each other to avoid such a mistake in the future.
8 december 2025
Review zonder uitnodiging
Antwoord van 21 Degrees
Thank you for taking the time to share your feedback and for your positive comments about the quality of the windows.
We are very sorry to hear about the confusion with the glazing bar configurations and appreciate how frustrating this must have been.
Our quotations are designed to make each window as clear as possible, with window and room references alongside large scale images showing the glazing bar layout and other key specifications. This is the industry standard.
If you would be happy to discuss this further, we would welcome the opportunity to talk through what happened and see what more we can do to restore your confidence in us.
⭕ The 21 Degrees Team
A S Heatpump Service
Request for a service and prompt action a vast improvement on my previous experience of this in any of your three iterations !I pronounce your new customer service set up a resounding success! The service itself was efficiently conducted and the engineer very pleasant and helpful. Thank you.
28 november 2025
Review zonder uitnodiging
Antwoord van 21 Degrees
Dear Robin,
Thank you so much for your wonderful feedback and 5‑star rating. We’re delighted to hear that you’ve noticed such an improvement in our customer service and that the recent visit met your expectations.
It’s great to know that our new service setup is making a positive difference and that our engineer provided helpful and efficient support. Your kind words mean a lot to the whole team.
We truly appreciate your continued trust and look forward to assisting you again in the future.
⭕ The 21 Degrees Team
Expensive!
Engineer was excellent although couldn’t clean out the capsule as he doesn’t carry the seals, (so just drained the water), spent 1 hour 45 minutes checking etc. so roughly works out at £100/hour so extremely expensive for a local company! Will be looking at more competitive rates next year!
24 november 2025
Review zonder uitnodiging
Antwoord van 21 Degrees
Thank you for taking the time to share your feedback. We’re pleased to hear that you were happy with the engineer’s professionalism and thoroughness during the visit.
We’re sorry to learn that you felt the cost was high and that the engineer couldn’t complete the capsule clean on this occasion. Our engineers aim to carry the most commonly required parts, but some specialist components, such as seals, need to be ordered to ensure the correct fit and quality. We appreciate your comments and will review how we can better communicate this in the future.
Your feedback is important to us, and we hope to have the opportunity to assist you again while providing even better value next time.
⭕ The 21 Degrees Team.
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