Combi-boiler replacement completed neatly by polite and competent gas-fitter in one visit lasting about 5 hours. Seems to be working fine. A follow-up visit was offered to improve the boiler contro... Vis mer
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Se hva andre synes
Amazing service! I ordered a new boiler and it was delivered and fitted just two days later. The gas engineer was brilliant and highly professional, swapping my old system for the new one in a single... Vis mer
I had a AC unit fitted and cannot thank the company and Engineer enough. i had fantastic service from the call centre especially Abbi who went out of her way to explain everything in great detail and... Vis mer
fantastic service from start to finish. this is my second time using Warmzilla. I got a boiler from there 3 years ago and had such a good experience that i decided to get air con from them too. qualit... Vis mer
Informasjon om virksomheten
- Leverandør av varmtvannsbeholdere
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- Gassinstallasjon
- Gassmontør
- Ladestasjon for elektriske biler
- VVS-firma
Om WarmZilla
Skrevet av virksomheten
WarmZilla is an online home services provider transforming how the UK buys and installs new boilers, EV chargers, air conditioning, and home heating solutions. Founded by experienced Gas Safe engineers, WarmZilla was built to eliminate pushy salespeople, hidden fees, and lengthy home visits by taking the entire quote and ordering process online. Using our quick online survey, customers receive fixed-price, tailored quotes in minutes. You simply choose the ideal boiler from leading brands - such as Worcester Bosch, Ideal, Vaillant, and Baxi - pick your preferred installation date, and let our team handle the rest. Every installation is carried out by handpicked, local Gas Safe registered engineers ("WarmInstallers") who deliver exceptional workmanship, complete system cleanses, and a clean, hassle-free setup.
We back all our work with a 1-year workmanship guarantee, top manufacturer warranties up to 10 years, and a price match promise. To make home upgrades accessible to everyone, we offer flexible payment options, including 0% interest-free finance. Beyond boiler installations, WarmZilla provides comprehensive home cover plans, annual servicing, emergency repairs, and EV charger installations across England, Scotland, and Wales.
Whether you need a quick boiler replacement or routine home care, WarmZilla delivers speed, transparent pricing, and 24/7 customer support - making home services simpler, fairer, and completely stress-free.
Best Price Guarantee
We won't be beaten on price
If you find a cheaper price on a like-for-like installation elsewhere, we guarantee to beat the price and take an extra £50 off your order.
Kontaktopplysninger
Capital Tower, Greyfriars Road, CF10 3AG, Cardiff, Storbritannia
- 02921 684 152
- ask@warmzilla.co.uk
- warmzilla.co.uk
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Great service
Great service, easy to use for the whole process. The install was easy and the people were profesional. Absolutly no complaints. 5 stars.
28. juli 2026
Svar fra WarmZilla
Thank you for your wonderful 5-star review.
We're delighted to hear that you found the whole process straightforward and easy to use from start to finish. It's also fantastic to know that your installation went smoothly and that our team were professional throughout.
Your feedback means a great deal to everyone at WarmZilla, and we're grateful that you chose us for your installation.
Thank you again for your support, and we hope you enjoy your new system for many years to come.
Easy to use website bo hassling phone…
Easy to use website bo hassling phone calls let me make my decision then gave me a selection of 4 install dates that suited me the men who fitted the boiler were polite and clvery clean workers
24. juli 2026
Svar fra WarmZilla
Thank you so much for your fantastic review.
We're delighted to hear that you found our website easy to use and that you were able to choose an installation date that suited you without any pressure or unwanted phone calls. That's exactly the experience we aim to provide.
It's also great to know that our installation team were polite, professional and left everything clean and tidy. We'll be sure to pass your kind comments on to them.
Thank you for choosing WarmZilla. We really appreciate your support and hope you enjoy your new boiler for many years to come.
Questionable business practices
Update: A lot of proactive comms from WarmZilla after this review - I has to chase everything before that! I have since been contacted by WarmZilla with a legal-style letter threatening action if I do not remove my review. I was then offered £50 as a goodwill payment in return for taking it down. Despite this, the website still shows new customers being offered installation dates such as 3 September, whereas the earliest date I was given for my order (placed on 3 July) was October 2026, communicated to me by email. Just building a winter order book.
———
Our AC order was taken with a confirmed installation date. We were told the installation would happen quickly, but after a month of confusing WhatsApp messages, we were only then informed of major delays. The deposit was also requested before any confirmed installation date could be given, which felt unreasonable and unprofessional.
The whole experience has been frustrating and has not felt transparent. If supply issues were already a problem, that should have been made clear at the outset instead of leaving customers in the dark. I would strongly advise others to be cautious before placing an order.
20. juli 2026
Anmeldelse skrevet uten oppfordring
Svar fra WarmZilla
Thank you for taking the time to leave your feedback. We genuinely appreciate all customer comments, whether positive or negative.
Firstly, we're sorry that your experience has left you feeling frustrated. We fully understand how disappointing delays can be, particularly when you're looking forward to having your new air conditioning system installed.
That said, we do respectfully disagree with the suggestion that our communication lacked transparency. We believe we communicated openly throughout the process, providing updates as the situation evolved. Unfortunately, the nationwide supply position changed rapidly, with manufacturers regularly revising availability, meaning information was changing almost daily. This was entirely outside of our control, and we shared the latest information with customers as soon as it became available.
Regarding the deposit, this was processed through your finance agreement. This is a requirement of the finance provider and is not a WarmZilla policy. The deposit is released as part of the finance process rather than being requested independently by us.
We also make it clear on our website that supply and installation dates are subject to manufacturer availability. Whilst we always aim to install as quickly as possible, unprecedented demand and fluctuating stock levels across the industry have unfortunately impacted every installer in the UK.
We pride ourselves on being a transparent business, and while we appreciate that this experience has been disappointing, we do not believe it accurately reflects the way we communicate with our customers or the circumstances surrounding the nationwide supply issues.
We remain committed to delivering your installation as soon as stock becomes available and thank you again for taking the time to share your feedback.
They went the extra mile
We got air con across two bedrooms and our living room. There were a few bumps along the way with scheduling and pipe routing, but WarmZilla really bent over backwards to get it right, listening properly when we had questions and adjusting the plan until we were happy. End result is genuinely great, quiet, does exactly what we needed, and the engineers left everything spotless. They clearly cared about getting the outcome right, not just finishing the job. Would recommend without hesitation.
3. juli 2026
Anmeldelse skrevet uten oppfordring
Svar fra WarmZilla
Hi Tom,
Thank you so much for taking the time to share such a detailed review.
We really appreciate your patience throughout the installation process and are glad we could work with you to find the best solution. It's fantastic to hear you're pleased with the final result and that the team left everything clean and tidy. We'll be sure to pass your kind words on to the engineers—they'll be delighted to know their care and dedication made a difference.
Thank you for your recommendation, and we hope you enjoy your new air conditioning for many years to come!
Proactive resolution, efficient order process in testing conditions
Although I have had an interesting encounter with WarmZilla, they have taken the feedback seriously and I have had a few conversations with Rhys who has been very proactive and upfront. Although the installation didn't happen today, they've tried to work with me and find a date within the next 14 days. As we are going overseas for an extended period of time, we may not opt to go with this date but the post experience follow-up has been positive and we may end up going with WarmZilla as a result of this,
9. juli 2026
Anmeldelse skrevet uten oppfordring
Svar fra WarmZilla
Thank you for taking the time to leave such detailed feedback. Firstly, we'd like to sincerely apologise for the disappointment and uncertainty you've experienced. We completely understand why this has been frustrating, particularly when you had planned around your original installation date.
We also appreciate you acknowledging the courteous conversations you had with our team and recognising that the nationwide shortage is genuine. Unfortunately, the unprecedented demand for air conditioning across the UK has created supply issues at manufacturer level, which are affecting distributors and installers nationwide. We receive daily updates on incoming stock, and while products are regularly allocated to us, those allocations are continually change due to demand exceeding supply. Regrettably, this is entirely outside of our control.
Please be assured that we have done, and continue to do, everything possible to source equipment and keep installations moving. Our team works tirelessly with suppliers and manufacturers to secure stock as quickly as it becomes available. It simply isn't in our commercial interest to delay installations, we want to install every customer's system as soon as we possibly can.
We're genuinely sorry that, on this occasion, we weren't able to meet the timescale you required and respect your decision to cancel. We do, however, hope you'll reconsider your review, as it reflects an unprecedented nationwide supply issue rather than the level of service or commitment from our team. Throughout this process, we've been open and transparent, and have done everything within our power to find a solution despite circumstances beyond our control.
We wish you all the very best and thank you for considering
Great fast responses from email team…
Great fast responses from email team and they got us an earlier date due to my mistake of booking when we was on holiday
9. juli 2026
Svar fra WarmZilla
Thank you so much for your fantastic review!
We're delighted to hear that our email support team was able to respond quickly and help bring your installation date forward after the holiday booking mix-up. We're always happy to help where we can and it's great to know we could find a solution that worked for you.
Thank you for choosing WarmZilla. We really appreciate your kind words and look forward to helping you again in the future.
Post sale and installation customer…
Post sale and installation customer service not good as I emailed several times for my payment receipt and warranty certificate.No reply and never received those documents
30. juni 2026
Svar fra WarmZilla
Thank you for your feedback, and we're sorry to read about your experience.
We've investigated this internally and, based on our records, we haven't been able to find any emails or previous contact from you regarding your receipt or warranty certificate. It's possible that your messages didn't reach us, and if that's the case, we're very sorry.
Please could you email us again with your order details, and we'll ensure your payment receipt and warranty documentation are sent to you as quickly as possible. We always want to resolve issues promptly, and we'd be more than happy to help.
Easy to order a new boiler and…
Easy to order a new boiler and installation fitted on time at a competitive price
29. juni 2026
Svar fra WarmZilla
Thank you for your wonderful review!
We're delighted to hear that you found the process of ordering your new boiler straightforward and that your installation was completed on time. Providing a simple, hassle-free experience alongside competitive pricing is exactly what we strive for.
Thank you for choosing WarmZilla and for taking the time to recommend us. We hope you enjoy your new boiler, and we're here whenever you need us in the future.
Reece was fantastic from start to…
Reece was fantastic from start to finish , very competitive pricing and a proper old school service which is rare in today’s world.
4. juli 2026
Svar fra WarmZilla
Thank you so much for your wonderful review.
We're delighted to hear that Reece provided such a fantastic experience from start to finish. We'll be sure to pass your kind words on to him—they'll mean a great deal.
It's especially rewarding to hear you describe our service as "proper old school." We pride ourselves on combining competitive pricing with honest, friendly customer service, and it's great to know that came across throughout your experience.
Thank you for choosing WarmZilla and for your recommendation. We look forward to helping you again in the future.
Heating service good installers
Heating service that provided knowledgeable engineers - unafraid to use a ladder :) and even though we had air trap issue it was quickly resolved.
Would recommend.
6. juli 2026
Svar fra WarmZilla
Thank you for taking the time to leave us such a lovely review.
We're delighted to hear that our engineer's knowledge and determination (including being happy to get the ladder out! 😊) made a positive impression. It's also great to know that the air trap issue was identified and resolved quickly, ensuring everything was left working as it should.
Thank you for your recommendation—it really does mean a lot to our team. We look forward to helping you again whenever you need us.
Not reliable anymore
I’ve had a plan with WarmZilla since November 2023. For the first two years, everything worked smoothly: quick responses, friendly service, and easy bookings. Unfortunately, the last 12 months have been a very different experience.
It has become almost impossible to book anything. You have to chase them constantly, and communication feels slow and fragmented. I requested a boiler service on 9 June — it’s now 6 July and it still hasn’t been booked.
Earlier this year, in January, I had an issue that took more than two weeks and around twenty emails before someone finally came out to look at it. The fact that there is no customer service phone number makes the whole process even more complicated.
WarmZilla used to be reliable, but sadly the service has declined significantly.
6. juli 2026
Anmeldelse skrevet uten oppfordring
Svar fra WarmZilla
Thank you for taking the time to leave your feedback.
Firstly, we're genuinely sorry to hear that your recent experience hasn't reflected the standard of service you previously received from us. We completely understand how frustrating it can be when you're waiting for a boiler service or repair to be arranged, particularly when you've been a loyal customer since 2023.
We're pleased that your boiler service has now been booked, although we appreciate it took longer than it should have to reach that point. Please accept our sincere apologies for the inconvenience caused.
We'd also like to reassure you that we offer several ways for customers to contact us, including email, live chat and social media messaging, all of which are actively monitored by our customer support team.
Your comments have been taken on board, and we appreciate you highlighting where we fell short. We value your continued support and hope your upcoming service helps restore your confidence in WarmZilla.
Postponed but decent customer service
We booked an installation for AC with Warmzilla and 3 days before the installation date they postponed the installation because of nationwide stock issues.
Initially unhappy as this AC is very important for my health issues and also barely any notice given of the postponement. However, they did everything in their power to source a unit and I have a new installation date for next week which is only a week later than planned.
Decent customer service during a time of difficulty with stock issues.
3. juli 2026
Anmeldelse skrevet uten oppfordring
Svar fra WarmZilla
Thank you very much for taking the time to update your review.
Firstly, we'd like to apologise again for the short-notice postponement. We completely understand how frustrating that was, especially given how important air conditioning is for your health. Having to delay an installation is never something we want to do.
Unfortunately, the nationwide air conditioning stock shortages have affected installers across the UK, but we're really pleased that our team was able to secure a unit and minimise the delay to just one week. We always do everything we can to find a solution for our customers, even when circumstances are outside of our control.
Thank you for recognising the efforts of our team during what has been a very challenging period. Your patience and understanding have been greatly appreciated, and we look forward to completing your installation next week and ensuring everything goes smoothly.
So i recently had Air Conditioning…
So i recently had Air Conditioning installed, or if the government's watching, it identifies as an Air-to-Air heat pump. From start to finish, Warmzilla kept me informed of any delays, which, when it's 30 degrees outside, is expected. The engineers who fitted the system did a great job with very little obstruction to my day-to-day work, and in all. Fantastic job, would highly recommend Warmzilla to anyone looking for Air Conditioning , so its 5 stars from me,
26. juni 2026
Svar fra WarmZilla
Thank you so much for your fantastic review! 😄 We love the "Air-to-Air heat pump" comment!
We really appreciate your patience and understanding throughout the process. With the recent heatwave, demand has been unlike anything we've experienced, so it means a lot that you recognised our efforts to keep you updated every step of the way.
We're delighted to hear the installation team did such a great job and managed to keep disruption to a minimum. I'll be sure to pass your kind words on to the engineers—they'll really appreciate the feedback.
Thank you again for choosing WarmZilla and for recommending us. We hope you enjoy staying cool (or warm, depending on the season!) for many years to come.
Don’t bother
Update following response:
WarmZilla. I’m sorry you are confused by my comments. Your response to my review here is clear and concise - had I had this level of honesty and transparency from your customer support service I would have been able to manage my expectations. Somethings clearly got lost in translation from you being able to set out the below and how your agents curate their narrative through the WhatsApp service
Originally review
Don’t bother. Filled out survey online and used their what’s app service as directed by the website. They take ages and I mean two days on average to get back to you. Gave them all the info they asked for, in every response they say how busy they are, fine I don’t mind, I was just looking for some quotes annmd install dates. Jump through all the hoops then get a final message to say ‘it’s a big install, come back in Aug for prices and dates’…oh so you don’t want to even entertain taking my money then. Fine I’ll go with a local independent installer who know how to treat customers
1. juli 2026
Anmeldelse skrevet uten oppfordring
Svar fra WarmZilla
Thank you for your feedback. We are genuinely sorry that this has been your experience.
We're a little confused by your comments, if we're honest, because our intention throughout was to be transparent and helpful rather than take your enquiry any further when we knew we couldn't deliver the level of service you deserved.
Due to the unprecedented demand for air conditioning across the UK, we're currently experiencing a significant backlog, as are many other installers and manufacturers. We appreciate that waiting for a response isn't ideal, and whilst we aim to reply as quickly as possible, some enquiries are currently taking up to 24 hours or, on occasion, a little longer. We apologise if this fell short of your expectations.
The reason we explained the current situation before providing a quotation was because we didn't feel it would be right to take your order, or encourage you to proceed, knowing that we couldn't offer realistic installation dates. We could quite easily have taken a deposit and continued the process, but that isn't how we choose to operate. We'd rather be honest, even if that means losing work.
Your installation is also a larger project, and with the current nationwide product shortages and installation backlog, we felt it was only fair to advise that pricing and scheduling would be much clearer once the market settled in August.
If you do decide to proceed with a local installer, we completely understand and genuinely wish you all the best with your installation. However, if you'd like us to revisit your quotation when stock and lead times improve, we'd be more than happy to help.
Excellent Service Despite a Challenging Installation ⭐⭐⭐⭐⭐
Here’s a polished Trustpilot review that sounds natural and detailed:
I had an excellent experience with Mozilla from start to finish and wouldn’t hesitate to recommend them.
I live on the 14th floor of a high-rise block, and my boiler flue is located on the outside of the building, which makes it difficult to access. Because of this, I’d previously contacted three other companies. They initially said the work would be possible, but after attending they changed their minds, or tried to charge extortionate prices for scaffolding and other access equipment without properly exploring alternative solutions.
Mozilla were completely different. The colleague I spoke to took the time to listen to all the details of my specific situation and understood the challenges straight away. Rather than dismissing the job or immediately suggesting expensive access methods, they explained that there was another approach they could take. They were knowledgeable, helpful, and gave me confidence that they knew what they were doing. They also got everything booked in quickly and kept me informed throughout.
On the day, the engineer arrived on time, was very friendly and professional, and explained everything to me in great detail before carrying out the work. He completed the job in around half a day despite the complications with access, and everything was left clean and tidy afterwards.
I’m extremely happy with the service I received. It’s refreshing to find a company that takes the time to understand a customer’s situation instead of looking for ways to overcharge. If anyone asked me for a boiler company, Mozilla would definitely be my first recommendation.
20. april 2026
Anmeldelse skrevet uten oppfordring
Svar fra WarmZilla
Hi Rhys,
Thank you so much for taking the time to leave such a detailed and thoughtful review. We’re delighted to hear that your experience with WarmZilla exceeded your expectations.
We understand that your installation presented some unique challenges, and we’re pleased our team could take the time to fully understand your situation and find a practical solution without resorting to unnecessary costs. Providing honest advice and finding the best approach for each customer is something we take great pride in.
It’s also fantastic to hear that our engineer kept you informed throughout the visit, completed the work professionally, and left everything clean and tidy. We’ll be sure to pass your kind comments on to the whole team, they’ll really appreciate the recognition.
Thank you again for choosing WarmZilla and for recommending us so highly. It was a pleasure to help, and if you ever need us again in the future, we’ll be here to help.
Good price for Air Con & Great Service
Good price for Air Con - great installation by Roland who was very can do and conscious of installing the outside unit in a discreet position.
29. juni 2026
Svar fra WarmZilla
Hi,
Thank you for your fantastic review!
We're delighted to hear you were happy with the value of your air conditioning installation and that Roland made such a positive impression. We'll be sure to pass on your kind words to him—he'll be pleased to know his can-do attitude and attention to discreetly positioning the outdoor unit were appreciated.
Thank you for choosing WarmZilla, and we hope you enjoy your new air conditioning for many years to come!
WarmZilla marked my complaint as "resolved" even though it was never resolved.
For months we've been going back and forth with WarmZilla without reaching a satisfactory outcome. Instead of resolving the issues, we ended up paying additional money out of our own pocket to have another engineer correct problems following the installation.
In my experience, WarmZilla did the bare minimum to close the case rather than properly addressing the issues we raised. The entire process has been stressful, time-consuming, and extremely frustrating. We also had to deal with additional damage and unexpected costs after the installation.
Based on my experience, I cannot recommend WarmZilla. If you're considering using them, make sure you understand what is and isn't covered, document everything, and be prepared for the possibility of a lengthy dispute if something goes wrong.
This review reflects my personal experience with WarmZilla and my honestly held opinion based on that experience.
26. januar 2026
Anmeldelse skrevet uten oppfordring
Svar fra WarmZilla
Hi,
Thank you for taking the time to share your feedback. We're genuinely sorry to hear how frustrating this process has been for you, and we appreciate that it has been a stressful experience from your perspective.
That said, we respectfully disagree with a number of the points raised in your review. Throughout this matter, we worked to investigate each concern, arranged follow-up visits, and carried out all remedial works that fell within the scope of our installation and warranty obligations. Where issues were identified that were unrelated to our work or fell outside our responsibility, we explained this as clearly as possible.
While we understand that you chose to instruct another engineer, we recognise that this has led to additional costs for you. However, we do not agree that these costs were the result of shortcomings in our installation.
We always aim to resolve concerns fairly and transparently, and we're disappointed that we were unable to reach an outcome that satisfied you. Nevertheless, we wish you all the best going forward, and thank you again for sharing your feedback.
Overall satisfactory
Initial installer turned up decided not to do the job and made up we had a gas leak and left. Warmzilla sent another person out and they fitted it no problem or issue and no gas leak. The sales team were very apologetic and quick to try to resolve. Overall I've got a working boiler a lot cheaper to what British Gas quoted us. By about 2k less.
17. juni 2026
Svar fra WarmZilla
Hi,
Thank you for taking the time to leave your feedback.
We're sorry that your initial experience did not meet the standard we strive to provide. We appreciate how frustrating it must have been to be left without hot water and to receive conflicting information following the first engineer's visit.
We're pleased that our team was able to arrange a second visit promptly, and that the installation was completed successfully without any issues. It's also great to hear that our sales team kept you informed and did their best to resolve the situation as quickly as possible.
We also appreciate your comments regarding our weekend support availability. While customers can contact us via email, telephone, live chat and our online enquiry forms, we understand your frustration at not receiving a response over the weekend. Feedback like yours helps us identify areas where we can continue to improve our service.
Thank you for recognising our competitive pricing and the efforts of our team to put things right. We appreciate your patience and your honest feedback.
Svar fra WarmZilla
Hi Kevin,
Thank you for your kind review! We're so pleased to hear you were happy with the service. Your feedback means a lot to our team.
If you need anything in the future, please do let us know.
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