Baxi
400 18kW Regular
A 18kW regular boiler from Baxi — installed in a single day by Gas Safe registered engineers.
Built for real homes.
Not showrooms.
The Baxi 400 18kW is designed to work quietly, efficiently, and reliably — for years to come.
- Lightweight, compact cupboard-fit design
- Top or rear flue options
- Easy replacement for an older regular boiler
- Works with a hot water cylinder such as the Megaflo Eco
- 18kW heat output — Regular boiler
- 18kW central heating output
- 5 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 400 18kW
The Baxi 400 Heat 18kW is Baxi's entry-level regular (heat-only) boiler, for homes that keep their hot water cylinder and loft tanks. It's lightweight and compact enough for a kitchen cupboard.
With a choice of top or rear flue, it's a straightforward replacement for an older regular boiler, and it works with hot water cylinders such as the Megaflo Eco.
Backed by a 5-year Baxi parts and labour warranty.
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, subject to status.
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