Comparing online fixed-price boiler installers? This page summarises how Boilercentral.com sits alongside BOXT, Heatable and iHeat on advertised starting prices and next-day rules, then points you to a fair checklist. We are not affiliated with those companies. Competitor figures below are from their public websites, checked 6 November 2026, and can change — always verify live.
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Gas only · From £1,790 fitted · Worcester Bosch, Viessmann, Alpha and Ideal · Get your fixed price online
At-a-glance comparison
Scroll horizontally to compare all four installers.
| Topic | Boilercentral.com | BOXT (public, 6 Nov 2026) | Heatable (public, 6 Nov 2026) | iHeat (public, 6 Nov 2026) |
|---|---|---|---|---|
| Advertised starting price | From £1,790 fitted | Advertises from £1,760 | Advertises from £1,845 | Advertises from £1,945 including fitting and VAT |
| Quote style | Online questions → fitted prices on screen; no phone call needed to see a price | Online quote journey (see their site) | Fixed price online (see their site) | Online questions → fixed price (see their site) |
| Next-day | Like-for-like if you order by 3pm, subject to slot/stock/postcode; 7 days/week | Next working day installs when ordered before 3pm (their copy) | Order by 3pm for install tomorrow, in most parts of the UK (their copy) | Depends on address and boiler availability; booking, payment and photos before 3pm; excludes Saturdays and Sundays (their copy) |
| Warranty headline | manufacturer-backed guarantee of up to 14 years depending on model on fitted boilers | Up to 12 years manufacturer’s warranty plus a one-year workmanship guarantee (their copy) | 10 year parts and labour warranty on selected boilers (their copy) | Check their site for the model you choose |
We do not claim to be the cheapest. Advertised starting prices can apply to different boiler types and installation work. Compare written fixed quotes for the same model, output and inclusions.
Sources: boxt.co.uk/boilers, heatable.co.uk/new-boilers, iheat.co.uk — checked 6 Nov 2026.
Boilercentral.com vs BOXT
BOXT advertises boiler installations supplied and fitted from £1,760, with next working-day installs when ordered before 3pm.
Boilercentral.com fits a shorter list of brands (Worcester Bosch, Viessmann, Alpha and Ideal), starts from £1,790, and lets you get your fixed price online without a sales call. Next-day fitting is for eligible like-for-like replacements if you order by 3pm (7 days a week), subject to availability.
Choose based on brand, total written price, warranty conditions and the real fitting date — not just the advertised starting prices on homepages.
Boilercentral.com vs Heatable
Heatable advertises fixed-price installations from £1,845 and says that if you order by 3pm it will install your new boiler tomorrow, in most parts of the UK and subject to availability.
Boilercentral.com’s advertised starting price and online quote work in a similar way. The differences are in which brands appear in your quote, guarantee length on the models we fit (up to 14 years depending on model registered), and exactly what each quote includes. Get both quotes for the same job before deciding.
Boilercentral.com vs iHeat
iHeat advertises boiler installations from £1,945, including fitting and VAT. Its next-day installation depends on your address and boiler availability, with booking, payment and photos completed before 3pm, and excludes Saturdays and Sundays.
Boilercentral.com’s advertised starting price is lower, but that does not prove a cheaper quote for your home. Compare like-for-like scopes and dates.
How to compare quotes fairly
- Same boiler type (combi/system/regular) and kW
- Same location vs relocation / conversion
- Inclusions: removal, flush, filter, thermostat, flue parts, waste, guarantee registration
- Warranty length and who backs it
- Earliest real install date
- The full price for that scope, in writing
More on buying online: buy a boiler online. Cost context: new boiler cost guide. If you are comparing a quote from British Gas, see British Gas boiler quote.
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Quote journey differences (plain English)
Online installers look similar on advertising. The practical differences are usually:
- Whether you see a fitted price before anyone phones you
- Which manufacturers appear in the quote
- What the written scope includes (flush, filter, thermostat, waste, guarantee registration)
- Whether next-day means 7 days a week, working days only, or weekdays with photo deadlines
With Boilercentral.com you get your fixed price online for Worcester Bosch, Viessmann, Alpha and Ideal boilers. Eligible like-for-like replacements can be fitted next day, 7 days a week, if you order by 3pm (depending on slots, stock and your postcode). None of that replaces a written quote for your postcode.
Brands and when that decides it
If you have already decided on a specific package another installer shows for a brand we don’t fit, Boilercentral.com may not be the right choice — we fit Worcester Bosch, Viessmann, Alpha and Ideal only. We still publish reviews for other brands people search when replacing what they have; that is not the same as fitting them.
If you are happy with Worcester, Viessmann, Alpha or Ideal, compare our fixed quote against theirs on scope and date, not logo size.
Who should choose Boilercentral.com?
- Want fitted prices on screen without a sales call to see them
- Want Worcester Bosch, Viessmann, Alpha or Ideal with a registered guarantee of up to 14 years depending on model
- Prefer next-day for eligible like-for-like swaps (order by 3pm, 7 days/week, subject to availability)
- Are replacing a mains-gas boiler
Choose another installer if you need a brand we don’t fit, or their calendar shows an earlier date for your exact package.
What we won’t claim
To keep this useful rather than one-sided:
- We won’t say Boilercentral.com is always cheapest
- We won’t compare competitor prices beyond the dated starting prices published on their homepages
- We won’t promise next-day for conversions or for every postcode
Re-check each installer on the day you buy — promotions and advertised starting prices can change.
FAQs
How does Boilercentral.com compare to BOXT and Heatable?
All offer online fixed-price gas installs and next-day style slots around a 3pm cut-off, though the rules differ (for example iHeat excludes weekends). Boilercentral.com shows fitted prices from £1,790 without a sales call and fits Worcester Bosch, Viessmann, Alpha and Ideal. Always compare like-for-like quotes for your postcode.
What’s the best online boiler installer?
It depends on brand, total price, warranty and date. Get fixed quotes from two or three installers for the same output and inclusions, then decide — not only on advertised homepage prices.
Does Boilercentral.com require a phone call for a quote?
No. Answer questions online and see fixed fitted prices. After you order, upload photos.
Are you always cheaper than BOXT / Heatable / iHeat?
No. Advertised starting prices differ and can change. Compare written scopes.