Heatable vs Renzy: boiler installation prices in London
Fitted prices for the same boilers, with warranties, installation dates and finance side by side.
Get my fixed priceKey takeaways
To fit a Worcester Bosch Greenstar 4000 25kW in central London, Heatable charges £2,690 and Renzy charges £2,549, £141 less. Renzy is cheaper on all 3 boilers both fit. Both give you a fixed price online without a home visit. Heatable offers finance, including 0% for up to four years on selected packages, and fits boilers nationwide through its network of partner installers. Renzy doesn't offer finance at the moment, takes no payment online, and only fits boilers in London.
Heatable and Renzy at a glance
| Compared | RenzyPlumbers |  |
|---|---|---|
| Fitted price, Worcester Bosch Greenstar 4000 25kW | £2,549Lower price | £2,690 |
| Manufacturer warranty | 10 years | 10 years |
| Workmanship guarantee | 12 months | 12 months |
| Earliest installation | Next working day when you book before 3pm | Next day when you order before 3pm |
| Saturday installation | £100 extra | £85 extra |
| Finance | Not offered at the moment | 0% on selected packages for up to 4 years, longer terms with interest, or Klarna |
| Paying | Pay nothing now. We'll call to confirm your date, then take a 50% deposit to secure it. The rest is due when the job is done. | Pay by card or on finance when you book, then upload photos of your current boiler |
| Who fits it | Renzy's local London team | A local installer from Heatable's network of 500+ partners |
| Where they work | London only | Nationwide |
| Reviews | 4.4 on Trustpilot | 4.8 on Trustpilot |
| Established | 2025 | 2017 |
Heatable's prices checked on 5 October 2026 for EC1A 1BB. Renzy's prices are from our current price book.
Same boiler, side by side
Every boiler both companies fit, priced for the same job: a combi swap in a central London flat, with the new boiler in the same place and a flue through the wall.
| Boiler | Heatable | Renzy | Renzy is |
|---|---|---|---|
| Worcester Bosch Greenstar 4000 25kW | £2,690 | £2,549 | £141 less |
| Worcester Bosch Greenstar 4000 30kW | £2,840 | £2,649 | £191 less |
| Vaillant ecoTEC plus 832 | £3,645 | £3,290 | £355 less |
Prices include VAT and fitting. Heatable's are what its website showed for EC1A 1BB on 5 October 2026, after its automatic discounts and before promo codes.
The bottom line
Heatable is a national online boiler installer, founded in 2017 and based in Warrington. It is a Which? Trusted Trader, fits boilers through a network of 500+ partner installers, and has a 4.8-star Trustpilot rating from 15,000 reviews. You answer a few questions, choose from fixed-price packages and book a date online. Renzy works the same way for London homes. To fit a Worcester Bosch Greenstar 4000 25kW in central London, Heatable charges £2,690 and Renzy charges £2,549, £141 less. Renzy is cheaper on all 3 boilers both fit. Heatable's packages include removing your old boiler, a chemical flush, a magnetic filter and a carbon monoxide alarm. Renzy's include the same, along with a programmable thermostat and a gas pipe upgrade where needed. Both add a 12 month workmanship guarantee to the manufacturer's warranty. Where they differ is paying and reach. Heatable lets you spread the cost with finance or Klarna, and charges £85 extra for a Saturday installation. Renzy takes nothing online: we call to confirm your date, then take a 50% deposit, with the rest due when the job is done. Saturdays cost £100 extra. If you want to pay monthly, or you live outside London, Heatable is the better fit. If you're in London, compare its price with Renzy's fixed price before you book.
Disclaimer
We read Heatable's prices from its website for a sample central London postcode (EC1A 1BB) on 5 October 2026. Online boiler prices change often and depend on your home, so your price from either company may differ. Get a quote from both before you book.
Finance terms, installation dates, warranties and Trustpilot ratings come from each company's website and Trustpilot page, and may have changed since we checked them.
This comparison is not an endorsement or recommendation. We are not affiliated with Heatable, and everything here is based on publicly available information. Renzy accepts no liability for decisions made based on this comparison.
Heatable vs Renzy: FAQs
- Is Renzy cheaper than Heatable for a new boiler?
To fit a Worcester Bosch Greenstar 4000 25kW in central London, Heatable charges £2,690 and Renzy charges £2,549, £141 less. Renzy is cheaper on all 3 boilers both fit. Both prices include VAT and fitting, for a like-for-like swap with the boiler staying where it is. We last checked Heatable's prices on 5 October 2026.
- How quickly can Heatable and Renzy fit a new boiler?
Heatable says it can fit a boiler the next day if you order before 3pm, and Renzy can fit one the next working day if you book before 3pm, as long as an engineer is free. A Saturday installation costs £85 extra with Heatable and £100 with Renzy. Most combi swaps take one day.
- Can I get a new boiler on finance?
Heatable offers 0% finance for up to four years on selected packages, longer terms with interest, and Klarna. Renzy doesn't offer finance at the moment. With Renzy you pay nothing online: we call to confirm your date, then take a 50% deposit, and the rest is due when the job is done.
- What warranty comes with the boiler?
Both register the manufacturer's warranty for you, so the same boiler comes with the same warranty from either company: 10 years on a Worcester Bosch Greenstar 4000 25kW, for example. Both add a 12 month workmanship guarantee on the installation.
- Who fits the boiler?
Heatable sends a certified engineer from its network of 500+ partner installers, who go through its Which? Trusted Trader onboarding. Renzy is a London company and only fits boilers in London, with certified engineers.
- How do Heatable's reviews compare with Renzy's?
Heatable has a 4.8-star Trustpilot rating from 15,000 reviews. Renzy is much newer and smaller, with a 4.4-star rating from 11 reviews. Reading recent reviews for both is the best way to judge them.