Baxi 800
Baxi

Baxi 800 boiler range and prices

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Baxi 800 prices

A Baxi 800 boiler costs between £1,200 and £1,500 (boiler only) and from £2,700 to £3,500 fully installed. The price is based on a like for like boiler type replacement in the same loactaion as the old boiler. Additions to the installation will ususally be reflected in a high total cost.


  • The least powerful 800 units are £300 less than the most powerful which accounts for the range in boiler only prices.


  • This premium boiler range from Baxi comes with a 10 year guarantee.

Prices per model

Baxi 800 Fuel Output Average Boiler Only Price Average Price with installation Quote
Combi 2 Gas / LPG 24kW £1,200 £2,700 Free Quote
Combi 2 Gas / LPG 30kW £1,350 £2,850 Free Quote
Combi 2 Gas / LPG 36kW £1,500 £3,000 Free Quote
Heat 816 Gas 16kW £1,200 £2,700 Free Quote
Heat 825 Gas 25kW £1,400 £2,900 Free Quote
Heat 830 Gas 30kW £1,500 £3,000 Free Quote
System 2 Gas / LPG 18kW £1,200 £2,700 Free Quote
System 2 Gas / LPG 24kW £1,300 £2,800 Free Quote
System 2 Gas / LPG 30kW £1,400 £2,900 Free Quote

Baxi 800 boiler range

The Baxi 800 range was updated in 2023 and is one of the premium boiler ranges form Baxi and is available as a combi, a system and a conventional boiler. And they come in a wide range out power outputs so suitable for all but the very largest homes.


  • The combi and system boilers come already LPG compatible and don't require any additional parts


  • They are available, in each boiler type, in output levels suitable for smaller homes, medium sized homes and large homes and can cope with high hot water demands from multiple bathrooms.


  • Compact design for added convenience to enclose the boiler in small cupboards to help maintain the aesthetics of your home.


  • High grade corrosion resistant brass hydraulics help to increase workable life and reduce breakdowns.

Key features

  • Fuel: Gas, LPG


  • Boiler type & output (kW):
  • Combi 26kW, 30kW, 36kW
  • System 18kW, 24kW, 30kW
  • Conventional 16kW, 25kW, 30kW


  • Dimensions (mm): 700 h x 395 w x 285 d


  • Solar Compatible: combi no, system yes


  • ErP Efficiency rating: A (93% efficiency in central heating)


  • Which? Best Buy Award: no


  • Quiet mark accreditation: 48dB - 51dB


  • Guarantee: 10 years


  • Flow rate: 10.2 to 15 litres per minute


  • Weight: 29.2kg to 30.5kg


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