Ryan Gill, Engineer
31 Jan : Updated 21 Oct ● 5 min read
Warmzilla vs BOXT: Get Help Deciding
Key takeaways
BOXT and Warmzilla* both offer fixed-price boiler installation quotes online. But which company provides the right service for you and your home? Below, we’ve listed out each company's offerings, so you can compare with ease. Take a look.
BOXT vs Warmzilla summary
Short on time? Read our quick summary of BOXT vs Warmzilla.
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Choose BOXT for a speedier installation, a better Trustpilot rating and more aftercare support.
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Choose Warmzilla for an independent company.
BOXT vs Warmzilla full comparison
From getting your new A-rated boiler installed as soon as the next working day, to receiving a greater range of aftercare support, you’ll struggle to find a better service than with BOXT. Keep reading to understand our full comparison between BOXT and Warmzilla.
| Features | BOXT | Warmzilla |
| Boiler installation** |
New A-rated boilers installed from £1,790. |
New A-rated boilers installed from £1,955. |
| All-inclusive boiler plan** |
An all-inclusive plan including a new boiler, installation, annual servicing and unlimited repairs. BOXT Life is available from £33.35 per month with no deposit. |
No. |
| Boiler service plans** |
Yes, from £8.99 per month. |
Yes, from £8.99 per month. |
| Boiler repairs** |
Yes, for £89. |
Yes, for £89.99. |
| Workmanship guarantee |
One year. |
One year. |
| Time taken to get a free personalised quote |
An online quote takes under two minutes. No home visit required. BOXT engineers can offer expert advice over the phone during working hours. |
An online quote takes under two minutes. No home visit required. Warmzilla’s Customer Support team can share expert advice over the phone during working hours. |
| Quote validity |
30 days. |
30 days. |
| Booking and speed |
Boilers can be installed as soon as the next working day, when ordered online before 3pm. BOXT’s sales team can place an order over the phone on your behalf. Boilers can be repaired as soon as the next working day when booked before 3pm. T&Cs apply. |
Boilers can be installed within 48 hours of ordering. Warmzilla’s sales team can place an order over the phone on your behalf. Boilers can be serviced or repaired as soon as 48 hours. |
| Payment options |
Pay in full Pay monthly options BOXT Life, the all-inclusive boiler plan The above options may also include 0% interest or not require a deposit. |
Pay in full Pay monthly options The above options may also include 0% interest or not require a deposit. |
| Green and eco-friendly options |
A-rated boilers Smart home gadgets EV chargers Solar panels Heat pumps Home storage batteries |
A-rated boilers Smart home gadgets EV chargers |
| Coverage |
A nationwide network of 15,000+ registered engineers, who are mostly subcontracted. All BOXT-accredited installers must have at least two years of experience as a Gas Safe engineer and pass a 25-point vetting process, which includes a DBS check. |
An undisclosed number of nationwide engineers. All Warmzilla-accredited engineers are fully regulated and must pass the company’s internal screening process. |
| Customer support |
Available on the phone: weekdays 8am - 8pm. weekends 9am - 3pm. Live chat 24/7. Email. Dedicated app for ongoing support throughout a product’s lifetime. |
Available on the phone: Monday to Friday 8am - 5pm. Saturdays 9am - 1pm. Live chat 24/7. Email. |
| Aftercare |
Remote pre-installation survey and post installation audit as standard by BOXT’s inhouse team. One-year workmanship guarantee. Up to 12-year manufacturer warranty. BOXT will automatically register your manufacturer warranty on your behalf. Phone line available seven days a week. Repairs available. Annual boiler Service Plans available. Live chat 24/7. A dedicated app that offers troubleshooting and ongoing support |
One-year workmanship guarantee. Warmzilla will automatically register your manufacturer warranty on your behalf. Issues can be raised on Warmzilla’s website. Repairs available Annual boiler service plan available Automated helpline. Annual services available. Live chat 24/7. |
| Installer information |
Pre-meet your installer; bios and photos available online. All installers will contact the customer before an installation to confirm an arrival time. |
All installers will contact the customer before their arrival on the day of installation. |
| # of 5* Trustpilot |
45,000+ |
1,600+ |
| Guaranteed Price Promise |
Yes. BOXT will beat any like-for-like quote by £50. |
Yes. Warmzilla will beat any like-for-like quote by £50. |
| Refer A Friend scheme |
Yes. |
Yes. |
| Number of employees. |
200+ |
51-200. |
Great BOXT reviews and testimonials
BOXT is proud of its 'Excellent' rating on Trustpilot, with 94% of customers awarding them five stars.
Trustpilot review from Rebecca Bolton, 16th October 2025
"Excellent service
On time
Explained everything, neat and tidy, respected my property and home.
Also love ❤️ the way you, the company remind me about keeping my boiler anniversary up to date. 5 years now and I have no complaints.
Have already recommended you to friends and family."
Trustpilot review from Jason Feetenby, 16th October 2025
"Fantastic work by the engineers who clean up well after the work is done. The quotes was great & much cheaper than 3 quotes I have received."
Trustpilot review from Mark, 20th October 2025
From purchase to arranging installation to completion of the install, Boxt made it all super easy. Ordered on Thursday after my 19 year old boiler died, was fitted following Monday, installation engineer was fantastic, did a great, clean job and showed me everything I needed to know before leaving."
BOXT boiler installation review by The Express
"If you want an easy, quick and convenient boiler installation, then BOXT is definitely for you – especially if you want to upgrade to smart heating controls at the same time. The installation is professional, tidy, and well-communicated, and from booking to fitting, you feel like you are kept in the loop at all times. Their aftercare is also great, with warranties of up to 10 years on their boilers and the offer of home cover to keep everything running smoothly. I couldn’t find any faults, so I’m giving them five stars. I also decided to check on my energy bill and compare it from April (when I had the boiler installed) to May, overall it saved me just over £50, £52.83 to be specific. While this may not sound like a lot, it’s sure to save me more during the winter period." - Angela Patrone, Senior Lifestyle Reporter, The Express
Read The Express' reviewSo, why choose BOXT over Warmzilla?
In summary, Warmzilla and BOXT both promise a convenient way to get a new A-rated boiler installed online. All quotes are valid for 30 days and come with a one-year workmanship guarantee, a Price Promise, plus a range of payment options.
BOXT installs a full range of energy-efficient products as soon as the next working day, thanks to its network of 15,000+ registered engineers. It provides a full range of aftercare options, including customer support seven days a week, an app, and a free pre- and post-installation audit by its in-house experts. They also have a greater number of five-star Trustpilot reviews.
Whereas Warmzilla is an independently-owned boiler installation company with an undisclosed number of engineers.
Visit BOXT's 'Why Choose BOXT' page to learn more reasons why customers choose our trusted service.
Order your next boiler with BOXT
Installed as soon as the next working day by our excellent engineers.
Get a fixed-price quote
*www.warmzilla.co.uk
**Correct as of October 2025
