The Baxi
800.
A 36kW combi boiler from Baxi — installed in a single day by Gas Safe registered engineers.
Built for real homes.
Not showrooms.
The Baxi 800 36kW is designed to work quietly, efficiently, and reliably — for years to come.
- Optimal Performance and Efficiency
- Adey Micro 2 Filter
- 36kW heat output — Combi boiler
- 25kW central heating output
- 15 L/min hot water flow rate
- 10 year manufacturer warranty
- 93% ErP efficiency rating
One price.
Everything covered.
No surprise add-ons. Your quote covers everything needed for a complete installation that meets all gas safety regulations, carried out by Gas Safe registered engineers.
Price and installation time varies depending on your installation requirements. Answer a few quick questions to get your exact fixed price.
Get your free quoteThe numbers
that matter.
Baxi 800 36kW
The Baxi 800 36kW is the most powerful model in the range, designed for larger homes with two or more bathrooms and a busy demand for hot water and central heating.
With a flow rate of 15 litres per minute, it can handle multiple showers and a full heating system simultaneously — without compromising on temperature or pressure.
Despite the extra output, it shares the same compact footprint as the rest of the range, fitting neatly into a standard kitchen cupboard at just 30.5kg. Brass hydraulics, a stainless steel heat exchanger, and an included Adey MagnaClean Micro2 filter all contribute to long-term reliability.
Smart thermostat compatible, hydrogen-blend ready, and backed by a 10-year warranty — it's the right boiler for a home that demands more.
Don't let cost get
in the way of warmth.
Spread the cost of your new boiler over monthly payments that fit your budget. Available through iDeal4Finance — apply in minutes.
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