Answer a few questions about your home and get a fixed, itemised price you can book online.
New combi boilers from £1,995, fully installed. No home visit needed.
Every boiler we fit, at a fixed price for swapping like for like in the same place. Moving the boiler or switching type adds a fixed amount, listed below.
Hot water straight from the mains, with no cylinder or loft tanks. Most London flats and smaller houses have one.
| Boiler | At onceShowers or baths at once | Heating | Warranty | Fitted price |
|---|---|---|---|---|
| Ideal Logic 24kW | 1 | 24kW | 5 years | £1,995 |
| Ideal Logic 30kW | 2 | 30kW | 5 years | £2,040 |
| Worcester Bosch Greenstar 4000 25kWMost popular | 1 | 24kW | 10 years | £2,549 |
| Worcester Bosch Greenstar 4000 30kW | 2 | 24kW | 10 years | £2,649 |
| Ideal Logic Max 30kW | 2 | 24kW | 10 years | £2,659 |
| Vaillant ecoFIT pure 825 | 1 | 18kW | 10 years | £2,769 |
| Vaillant ecoFIT pure 830 | 2 | 25kW | 10 years | £2,800 |
| Worcester Bosch Greenstar 4000 35kW | 3 | 30kW | 10 years | £2,849 |
| Baxi 800 25kW | 1 | 20kW | 10 years | £3,229 |
| Vaillant ecoTEC plus 832 | 2 | 25.5kW | 10 years | £3,290 |
| Vaillant ecoTEC plus 838 | 3 | 30kW | 10 years | £3,490 |
| Worcester Bosch Greenstar 8000+ 32kW | 3 | 30.2kW | 10 years | £3,650 |
For homes keeping their hot water cylinder, so several taps can run at once.
| Boiler | Heating | Warranty | Fitted price |
|---|---|---|---|
| Ideal Logic Max System 24kW | 24kW | 10 years | £2,449 |
| Worcester Bosch Greenstar 4000 System 25kW | 25kW | 10 years | £2,649 |
| Vaillant ecoTEC plus 630 System | 30kW | 10 years | £2,999 |
For homes keeping their cylinder and the water tanks in the loft.
| Boiler | Heating | Warranty | Fitted price |
|---|---|---|---|
| Ideal Logic Max Heat 24kW | 24kW | 10 years | £2,399 |
| Worcester Bosch Greenstar 4000 Regular 24kW | 24kW | 10 years | £2,599 |
| Vaillant ecoTEC plus 424 Regular | 24kW | 10 years | £2,899 |
Each one is a fixed price, shown before you book.
A like-for-like combi boiler swap with Renzy costs £1,995 to £3,650, fitted, at a fixed price. That covers the boiler, a new flue, a magnetic filter, a system flush, a thermostat and the Building Control paperwork. System and regular boilers, for homes keeping their hot water cylinder, cost £2,449 to £2,899.
The boiler you choose, and any extra work your home needs. Switching from a system or regular boiler to a combi adds £850 to £950, moving the boiler to another room adds £1,300, moving it to the loft adds £1,500, and a flue through the roof adds £500. Every extra is a fixed price, shown before you book.
The Ideal Logic 24kW is our cheapest combi at £1,995, and it's reliable with a 5 year warranty. For £554 more, the Worcester Bosch Greenstar 4000 25kW comes with a 10 year warranty, which is why it's the one we fit most. For most London homes, the longer warranty is the better value over the life of the boiler.
A straightforward like-for-like combi boiler swap typically takes one day. More complex installations - such as switching boiler type, moving the boiler location, or replacing a hot water cylinder - may take one to two days. Renzy engineers aim to complete all standard replacements within a single visit.
Yes. Every fixed price covers the boiler and its installation, plus a new flue, a magnetic filter, a chemical flush, a programmable thermostat and a carbon monoxide alarm. Anything extra, like moving the boiler, is a fixed amount shown before you book, so the price you see is the price you pay.