Adam Knight, Lead Engineer
28 Nov : Updated 28 Nov ● 6 min read
iHeat vs BOXT: Complete boiler installation comparison
Key takeaways
Both BOXT and iHeat* offer their customers free fixed-price boiler installation quotes. But which company offers the right service for you and your home? Scroll down to easily compare each company's offerings and make the best decision.
BOXT vs iHeat summary
Short on time? Read our quick summary of BOXT vs iHeat.
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Choose BOXT for lower prices, more five-star Trustpilot reviews, more engineers, and support seven days a week..
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Choose iHeat for an independent company with Which? Trusted Trader status.
BOXT vs iHeat full comparison
With over five times more five-star Trustpilot reviews, a pre- and post-installation audit as standard, and a broader range of aftercare support, you’ll struggle to find a better boiler installation service than with BOXT.
Discover our full comparison between BOXT and iHeat.
| Features | BOXT | iHeat |
| Boiler installation** |
New A-rated boilers installed from £1,790. |
New A-rated boilers installed from £1,985. |
| 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. |
No. |
| Boiler repairs** |
Yes, for £89. |
No. |
| Warranty |
Up to 12 years. |
Up to 10 years. |
| 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. iHeat’s Customer Support team can share expert advice over the phone during working hours. |
| Quote validity |
30 days. |
Unclear from website. |
| 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. |
Boilers can be installed as soon as the next working day, when ordered online before 3pm. iHeat’s sales team can place an order over the phone on your behalf. |
| Payment options |
Pay in full Pay monthly options The above ‘pay monthly’ options may also include 0% interest or not require a deposit. BOXT Life, the all-inclusive boiler plan |
Pay in full Pay monthly options The above ‘pay monthly’ 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 Solar panels and battery storage Heat pumps |
| 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. |
A nationwide network of 400+ registered engineers, who are mostly subcontracted. All iHeat-accredited engineers are fully certified 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. Dedicated app for ongoing support throughout a product’s lifetime. |
Available on the phone: Monday to Thursday 8am - 7pm. Fridays 8am - 5pm. Saturdays 9am - 2pm. Live chat: Monday to Thursday 8am - 5pm. Fridays 8am - 5pm. Saturdays 9am - 2pm. |
| 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. Up to 10-year manufacturer warranty. iHeat will automatically register your manufacturer warranty on your behalf. Annual servicing available from £99 for customers who had an installation with iHeat. Phone line available Monday - Saturday. Live chat available Monday - Saturday. |
| Additional products |
Solar panels Air conditioning Home storage batteries Heat pumps EV chargers |
Solar panels Air conditioning Home storage batteries |
| 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 an installation to confirm the appointment. |
| # of 5* Trustpilot |
45,000+ |
8,800+ |
| Guaranteed Price Promise |
Yes. BOXT will beat any like-for-like quote by £50. |
No. |
| Refer A Friend scheme |
Yes. |
Yes. |
| Number of employees. |
180+ |
Between 11-50. |
Great BOXT reviews and testimonials
As the UK’s most trusted online boiler installation company, BOXT is proud of its 'Excellent' rating on Trustpilot, with 94% of customers awarding them five stars.
"Excellent Service and professional approach.
I booked BOXT combi boiler installation after poor experience with iHeat.
Everything went smooth and easy.
I booked installation on Sat as I work during the week.
As soon as installation was confirmed I knew who is coming.
Day before gentlemen called to confirm he will be coming in on Sat am.
On Sat am engineer came exactly on time and carried out works straight away.
Even when courier failed to deliver boiler on time, BOXT sort it out within 30 min and offered boiler upgrade free of charge which has been collected by engineer locally (Norwich).
Job has been done with extreme level of professionalism and time keeping...I'm really impressed.
So if you need to replace your combi boiler, BOXT is the the place to go.."
"I thought replacing my boiler would be time-consuming and complicated - but with BOXT, it only took about 20 minutes of my time" - Ideal Home, 5* review
BOXT takes the hassle out of boiler replacements, offering an easy-to-use service from start to finish. Choosing a boiler was a simple process, communication was stellar throughout, and the installation was quick and painless. Reasons to buy: - Impressive communication and customer service - Wide range of boilers available - Clean and professional fitting - Easy-to-use app - Next-day installation available
Read Ideal Home's reviewSo, why pick BOXT over iHeat?
In summary, iHeat and BOXT both offer a free online boiler installation quote in under two minutes, as well as a one-year workmanship guarantee, and installation as soon as the next working day when ordered before 3 pm.
In addition, BOXT offers a Price Match Promise, an all-inclusive boiler plan, boiler repairs, and an annual boiler Service Plan. It provides information about a customer's installer before the installation day, as well as a broad range of aftercare options, like a free pre- and post-installation audit by its in-house experts, and customer support seven days a week. They also have an award-winning app that allows you to plan and manage bookings, troubleshoot issues, and store important documents.
Whereas iHeat is a smaller, independently-owned company, which offers Klarna as an additional payment method. However, its website doesn't state how long its online quotes remain valid, they will only perform services on boilers they have installed, and their network of engineers is significantly smaller than BOXT's.
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.iheat.co.uk
**Correct as of October 2025
***Boilers from £33.35 per month over 120 months. Example based on cash price of £1,845.00 (boiler and installation) plus servicing at £6.99/month. Total amount payable £4,002.46. Amount of credit £1,845.00. Total cost of credit £1,318.66. Fixed interest rate 11.90%. Total APR 19.66%. Subject to status and credit check. Terms and conditions apply.
