UK 2026 / Reviewed October 2026
Viessmann boiler replacement cost
Germany (Allendorf)
Viessmann does not publish a consumer price, and BOXT, the fixed-price installer we check, does not list Viessmann boilers (checked 22 October 2026). The figure that counts is a written quote; below are the model range and the warranty terms to compare quotes against.
Viessmann models, prices and warranty
Installed prices are BOXT's published fixed "from" prices, which include removal of the old boiler and the installation labour. A dash means BOXT does not list a price for that model.
| Model | Type | Installed from | Warranty |
|---|---|---|---|
| Vitodens 050-W | Combi | - | 7 years on registration, 10 for a fee |
| Vitodens 100-W | Combi / system | - | 7 years on registration, 10 or 12 for a fee |
| Vitodens 200-W | Combi / system | - | 7 years on registration, 10 or 12 for a fee |
Warranty and what it depends on
2 years standard, 7 years free on registration; Vitodens 100-W and 200-W can be extended to 10 or 12 years for a fee. Viessmann warranty terms
- The installer must register the boiler on Viessmann's VPlus platform within 30 days, or the 2-year standard warranty applies
- The longer 10- and 12-year terms are paid extensions; ask whether your quote includes one
- Viessmann's terms apply to mainland Great Britain
Frequently asked
How much does a Viessmann boiler cost installed?
Neither Viessmann nor BOXT publishes a consumer installed price for Viessmann boilers, so the only reliable figure is a written quote. For context, the Energy Saving Trust puts the average cost of replacing a G-rated gas boiler with an A-rated one, with radiator valves, at £3,500 in Great Britain.
What warranty does Viessmann offer?
2 years standard, 7 years free on registration; Vitodens 100-W and 200-W can be extended to 10 or 12 years for a fee. Conditions: The installer must register the boiler on Viessmann's VPlus platform within 30 days, or the 2-year standard warranty applies; The longer 10- and 12-year terms are paid extensions; ask whether your quote includes one; Viessmann's terms apply to mainland Great Britain.
How do I find an accredited installer?
Viessmann runs its own installer search on its UK site. Separately, check any installer at gassaferegister.co.uk and ask to see their Gas Safe ID card before work starts. The manufacturer's accredited-installer status is what unlocks the longest warranty terms.
Compare against other brands on the by-brand index. Still deciding which type? cost by type.