Combi boiler

Baxi
800 36kW Combi

A 36kW combi boiler from Baxi — installed in a single day by Gas Safe registered engineers.

Fully installed from
£2,870
Finance available
36kWHeat output
CombiBoiler type
10 yearsManufacturer warranty
1–2 dayInstallation
Baxi 800 Combi 2 gas combi boiler with Adey MagnaClean filter and external pressure gauge
Combi boiler
36kW output
15 L/min flow rate

Built for real homes.
Not showrooms.

The Baxi 800 36kW is designed to work quietly, efficiently, and reliably — for years to come.

  • Adey Micro2 magnetic system filter included
  • Stainless steel heat exchanger and brass hydraulics
  • EasyFill link for topping up system pressure yourself
  • Pre-heated condensate trap to help prevent freezing
  • Manufactured in the UK
  • 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.

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Flue, fittings & full installation
Magnetic system filter
System cleanse & inhibitor
Removal & safe disposal of your old boiler
Gas Safe registered installation certificate
Warranty registration

The numbers
that matter.

Boiler type
Combi
System type
Heat output
36kW
Combi boiler
Central heating
25kW
Heating output
Flow rate
15 L/min
Hot water delivery
Efficiency
93%
ErP energy rating
Warranty
10 years
Manufacturer guarantee
Dimensions
W 395 x H 700 x D 285 mm
Width × height × depth
Fully installed from
£2,870
Fully installed, no extras

Baxi 800 36kW

The Baxi 800 Combi 36kW is the top of Baxi's combi range and is manufactured in the UK. It fits in a standard kitchen cupboard and delivers hot water at up to 15 litres a minute.

It comes with an Adey Micro2 magnetic filter, which protects the boiler from sludge in your heating system. It also has a stainless steel heat exchanger, brass hydraulics, the EasyFill link for easy pressure top-ups and a pre-heated condensate trap to help prevent freezing in winter.

Backed by a 10-year Baxi parts and labour warranty. Baxi requires the Adey filter to stay fitted for the full warranty, so have it cleaned at each annual service.

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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Representative example only. Subject to status. Boxheat Ltd is an Introducer Appointed Representative of Ideal Sales Solutions Ltd t/a Ideal4Finance (FN 703047).