Customer rep that i chatted with was helpful in getting a competitive price and arranging a lot quick. any changes, i was informed on time and in one occasion, i was compensated for the delay. All thr... See more
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Review summary
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What people talk about most
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Really pleased overall with WarmZilla and would probably give 4.5 stars if Trustpilot allowed it. The boiler installation itself was excellent value for money and the engineers were professiona... See more
Company replied
Our boiler was fitted on the second attempt after the first fitter broke down on route. The men were prompt and efficient fitting the new boiler and left the place tidy. Unfortunately as yet the boil... See more
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Super quick. Kept informed. The engineer (Marcos) was outstanding in every way. Professional, polite, helpful, patient and highly skilled. Incredible how much he achieved in less than 2 days and le... See more
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Company details
- Boiler supplier
- also in
- Electric vehicle charging station
- Gas engineer
- Gas installation service
- Gasfitter
- Heating service
About WarmZilla
Written by the company
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.
Contact info
Capital Tower, Greyfriars Road, CF10 3AG, Cardiff, United Kingdom
- 02921 684 152
- ask@warmzilla.co.uk
- warmzilla.co.uk
4.3
Excellent
2k reviews
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 72% of negative reviews
Typically replies within 2 weeks
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Fantastic
Fantastic, efficient service from start to finish, all work was completed to a high standard and all completed on time, boiler now working great again, would highly recommend
31 March 2026
Unprompted review
Reply from WarmZilla
Hi,
Thank you for your wonderful review!
We’re delighted to hear that the service was fantastic and efficient from start to finish, and that the work was completed to a high standard and on time.
It’s great to know your boiler is now working perfectly, and we really appreciate your recommendation.
Thank you for choosing us!
Superb Efficient Service
Efficient, professional service, arrived when expected, good communication throughout. Highly recommended
24 March 2026
Unprompted review
Reply from WarmZilla
Hi Marc,
Thank you for your fantastic review!
We’re pleased to hear that our service was efficient and professional, that our team arrived on time, and that communication was clear throughout.
Your recommendation means a lot to us. Thank you for choosing Warmzilla!
Highly recommend
Top notch service. Highly Recommend. Thanks WarmZilla.
5 March 2026
Unprompted review
Reply from WarmZilla
Hi,
Thank you for your review!
We’re thrilled to hear you received top-notch service and really appreciate your recommendation.
Thanks for choosing Warmzilla!
First time using this company to…
First time using this company to install a new boiler. Shopped around and did a lot of research with other companies.
Absolutely great service, team were spot on, from the initial interest through emails, all the way from install to completion.
Family and friends are now in the process of having work done and annual servicing.
23 March 2026
Unprompted review
Reply from WarmZilla
Hi,
Thank you for your wonderful review!
We’re delighted to hear that your first experience with Warmzilla was so positive, from initial contact all the way through to installation completion.
It’s fantastic to know the team provided great service and kept everything running smoothly, and we’re thrilled your family and friends are now choosing us for their own boiler installations and annual servicing.
Your support and recommendation mean a lot to the whole team, thank you!
Absolutely fantastic company
Absolutely fantastic company with amazing customer service , they could not help enough , seamless from start to finish , hassle free and had my home nice and warm again,
Would never use anyone else again , top notch service ! thank you guys !
27 March 2026
Unprompted review
Reply from WarmZilla
Hi Aaryn,
Thank you for such an amazing review!
We’re absolutely delighted to hear you found the whole process seamless and hassle-free from start to finish.
It’s great to know our team were able to help every step of the way and get your home warm again quickly, that’s exactly what we aim for. Your kind words about our customer service really mean a lot to us.
Thank you for your support and loyalty. We truly appreciate it!
Absolutely brilliant service from…
Absolutely brilliant service from Warmzilla. My parents’ boiler broke down during Christmas week, which is about the worst timing possible, but they managed to sort everything out incredibly quickly.
From the first contact, they were responsive, professional, and really reassuring. They understood the urgency, especially with it being over the festive period, and went above and beyond to get everything up and running again with minimal disruption.
The installation was smooth, the engineers were friendly and efficient, and everything was explained clearly. It made a stressful situation so much easier for my parents.
Highly recommend Warmzilla if you need a reliable and fast boiler replacement, especially when timing really matters.
22 December 2025
Unprompted review
Reply from WarmZilla
Hi Laura,
Thank you so much for your wonderful and detailed review.
We’re delighted to hear that we were able to help your parents during such a difficult time, especially over Christmas when a boiler breakdown is the last thing anyone needs.
It’s great to know that our team were responsive, professional, and reassuring from the very first contact, and that the urgency of the situation was handled with care. We’re also pleased the installation went smoothly and that our engineers were friendly, efficient, and kept everything clear and easy to understand.
Making a stressful situation easier for your parents is exactly what we strive for, so your feedback really means a lot to us.
Thank you for your recommendation and for trusting Warmzilla when timing really mattered.
A very friendly man who gave adequate…
A very friendly man who gave adequate warning of visit. He was on time and respected my property. I am pleased
3 April 2026
Reply from WarmZilla
Hi Patricia,
Thank you for your kind review.
We’re really pleased to hear that the engineer provided good notice ahead of the visit, arrived on time, and treated your property with respect.
It’s great to know you were pleased with the service — we truly appreciate your feedback.
Brilliant service
Brilliant service, product quality and efficiency. Ordered a new boiler on Wednesday afternoon and it was installed by Thursday Lunchtime!
26 March 2026
Reply from WarmZilla
Hi Alex,
Thank you for your fantastic review!
We’re delighted to hear you were happy with the service, product quality, and efficiency.
Getting your new boiler installed from Wednesday afternoon to Thursday lunchtime is exactly the kind of fast turnaround we aim to deliver, so it’s great to know everything went smoothly for you.
Thank you for choosing us we really appreciate your feedback.
Highly recommended.
Highly recommended.
Ordering was easy online and really prompt installation.
The installation was fantastic with nothing too much trouble.
Really neat install although the boiler was moved to the loft Rory the gas engineer was not phased ny anything and did such a neat job.
Thank you.
2 April 2026
Reply from WarmZilla
Hi Chris,
Thank you for your fantastic review and recommendation.
We’re really pleased to hear that ordering online was easy and that the installation was carried out so promptly.
It’s great to know that moving the boiler to the loft was handled without any issues and that Rory delivered such a neat and professional installation. We’ll be sure to pass on your kind words to him — he’ll really appreciate the recognition.
Thank you again for choosing Warmzilla — we truly appreciate your feedback.
Had to chase the for our annual boiler service
Had to chase the for our annual boiler service. They do not automatically remind you or book in advance. When I rang to arrange service the engineer came out and condemned the boiler as unsafe. The time between my annual service date and me chasing them to arrange we were living with a dangerous boiler. When the engineer cut the boiler off he said WarmZilla would be in touch to discuss a replacement, they never did so I went to BoxT (very good service).
I would not recommend WarmZilla.
2 March 2026
Unprompted review
Reply from WarmZilla
Hi Gary,
Thank you for your feedback. We’re very sorry to hear about your experience and the concerns you’ve raised.
We understand how worrying it must have been to discover your boiler was unsafe, and we sincerely apologise that you felt you had to chase for your annual service and did not receive follow-up contact after the boiler was condemned. This is not the level of service we aim to provide, and we appreciate you bringing this to our attention.
Your comments regarding service reminders and the lack of follow-up have been noted, as this is something we take very seriously and will review internally.
Thank you again for sharing your experience — feedback like this helps us identify where we need to improve.
Excellent service
Warmzilla`s website gave me a good choice of boilers and made it easy to pick one. After I picked one, I sent pictures over and no costs were added on. Engineer came out and fitted on the chosen day no hassles. Excellent job done. Very happy. Would recommend.
23 March 2026
Reply from WarmZilla
Hi Jack,
Thank you for your fantastic review. We’re really pleased to hear that you found the website easy to use and that it gave you a good choice of boilers to suit your needs.
It’s great to know the process of sending photos was straightforward, with no unexpected extra costs, and that the installation went smoothly on the chosen day without any hassle. We’re delighted you’re very happy with the result.
Thank you for your recommendation — we truly appreciate your support.
Reply from WarmZilla
Hi Charles,
Thank you for the amazing feedback!
We’re delighted to hear you had such a great experience and rated our service 10/10.
We really appreciate your recommendation — it means a lot to the whole team.
Easy from start to finish
Easy from start to finish. Excellent price. The lads who fitted my boiler were great.
23 March 2026
Reply from WarmZilla
Hi,
Thank you for your great review.
We’re really pleased to hear the whole process was easy from start to finish and that you were happy with the price.
It’s also great to know the engineers who fitted your boiler did a great job — we’ll be sure to pass on your kind feedback to them.
Thanks again for choosing Warmzilla!
Great communication and quick install
Great communication and quick install, Scott came out and changed my old standard system to combi boiler. He kept me informed all through the job and ensured everything was completed to a high standard.
19 March 2026
Reply from WarmZilla
Hi James,
Thank you for your great review. We’re really pleased to hear you were happy with the communication and quick installation.
It’s fantastic to know Scott kept you informed throughout and completed the conversion to a combi boiler to a high standard. We’ll be sure to pass on your kind feedback to him — he’ll really appreciate it.
Thanks again for choosing Warmzilla!
Boiler service good, everything else was poor
Where the service of the boiler was top notch, having to be at least 2 months from boiler should have been done was disappointing part of the process. Having to keep getting in touch to see when the boiler was going to be serviced was not good.
15 January 2026
Reply from WarmZilla
Hi John,
Thank you for your feedback.
We’re really pleased to hear that the boiler service itself was top notch, but we’re very sorry to hear about the delays and the need to chase for updates.
Waiting that long for a service and having to follow up multiple times is not the experience we want for our customers, and we completely understand your frustration. Your comments are really important and will be shared with the team to help improve our scheduling and communication.
Thank you again for bringing this to our attention, and we appreciate your patience.
ZERO communication
ZERO communication.
Spent a grand getting an EV charger installation booked. They allowed me to book a good date.
As soon as they had my money they went quiet. Ended up having to speak to their live chat nearly every day. Excuses about suppliers letting them down, but they made no attempt to update me. On day of delivery, they say their supplier tried to deliver but nobody replied. I was here all day and nothing showing on ring doorbell.
Excuse after excuse and no communication. Even after raising a written complaint I was ignored.
AVOID
19 March 2026
Unprompted review
Reply from WarmZilla
Hi Nick,
Thank you for your review.
I can see that we are currently in contact with you regarding this matter and are working to resolve it as quickly as possible.
Thank you for your patience.
I had an extremely good service from…
I had an extremely good service from start to finish. Staff were very informative snd removal of my old boiler and installation of the new one was carried out efficiently. Overall a good experience.
18 March 2026
Reply from WarmZilla
Hi Sharmini,
Thank you for your kind review.
We’re delighted to hear you had such a positive experience from start to finish and found our team informative throughout.
It’s great to know the removal of your old boiler and installation of the new one was carried out efficiently.
We really appreciate your feedback and are pleased everything went smoothly for you.
Terrible service
I have home care boiler cover with Warmzilla. They have been awful. I have had a problem with my boiler for over 6 weeks now and it’s still not fixed.
It takes days for the company to reply to my emergency breakdown requests and then days more to get an engineer out. I waited 2 wees for 1 engineer.
In the mean time I’m paying a fortune in bills because my boiler won’t turn the heating off!
I’ve finally had an engineer identify the problem but have been waiting a week to hear from Warmzilla about getting the problem fixed now we know what the problem is.
Terrible service. Won’t be renewing my contract
14 March 2026
Unprompted review
Reply from WarmZilla
Hi,
Thank you for taking the time to share your feedback. We’re very sorry to hear about your experience and the frustration this has caused.
I can confirm that we are currently in contact with you and working to resolve the issue as quickly as possible.
Thank you again for bringing this to our attention.
Reply from WarmZilla
Hi Simona,
Thank you for your review! We’re delighted to hear you received excellent customer service.
We really appreciate you taking the time to share your feedback.
Easy to use website
Easy to use website, great communication, didnt hassle me with a sale, I chose the next working day for installation. Engineer was professional, friendly and all installed within half a day! cant fault warmzilla on any part of the process
13 March 2026
Reply from WarmZilla
Hi Hannah,
Thank you for your fantastic review.
We’re delighted to hear that you found the website easy to use and appreciated the clear communication without any sales pressure. It’s great to know the next-day installation worked well for you and that the engineer was professional, friendly, and able to complete everything within half a day. We’re really pleased the whole process met your expectations from start to finish.
Thank you for choosing Warmzilla and for your kind feedback — it’s truly appreciated.
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