The Baxi
400.
A 30kW combi boiler from Baxi — installed in a single day by Gas Safe registered engineers.
Built for real homes.
Not showrooms.
The Baxi 400 30kW is designed to work quietly, efficiently, and reliably — for years to come.
- Compact cupboard fit
- Quiet operation
- Durable brass hydraulics and stainless steel heat exchanger
- 30kW heat output — Combi boiler
- 25kW central heating output
- 12.2 L/min hot water flow rate
- 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 30kW
The Baxi 400 30kW delivers more hot water output for households that need a little more from their boiler. With a flow rate of 12.2 litres per minute, it can comfortably handle a shower and a tap running simultaneously in smaller to medium-sized homes.
It shares the same compact, cupboard-fit design as the 24kW, with a stainless steel heat exchanger, brass hydraulics, and A-rated efficiency throughout. The pre-heated condensate trap reduces the risk of frozen pipes in winter, and the rigid filling link makes pressure top-ups easy for homeowners.
Compatible with the Baxi uSense smart thermostat and backed by a 5-year 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 — apply in minutes.
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