The Baxi
800.
A 24kW combi boiler from Baxi — installed in a single day by Gas Safe registered engineers.
Built for real homes.
Not showrooms.
The Baxi 800 24kW is designed to work quietly, efficiently, and reliably — for years to come.
- Kitchen cupboard fit
- Adey Micro 2 Filter
- 24kW heat output — Combi boiler
- 20kW central heating output
- 10.2 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 24kW
The Baxi 800 24kW is a compact combi boiler built for reliable everyday heating and instant hot water in flats and smaller homes with one bathroom.
With a stainless steel heat exchanger, brass hydraulics, and a 93% efficiency rating, it delivers consistent performance without wasting energy — helping to keep running costs down year-round.
It fits neatly inside a standard kitchen cupboard, and the simple hanging bracket makes for a clean, straightforward installation. The Easy-Fill permanent filling link also means homeowners can top up system pressure themselves, without needing to call an engineer.
Compatible with the Baxi uSense smart thermostat and certified to work with 20% hydrogen blends, it's a future-ready boiler that won't need replacing any time soon.
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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