Baxi Baxi 800 Combi 24
The Baxi 800 is the brand's premium combi range, offering 94.9% efficiency and a 10-year warranty. One of the best-value premium boilers on the UK market, competing directly with the Worcester 4000 and Vaillant ecoTEC Pro.
Technical Specifications
Key Features
- 94.9% ErP seasonal efficiency
- 10-year parts and labour warranty available
- Weather compensation ready
- Smart thermostat compatible
- Quiet operation
- Available in 24, 28, and 33 kW
Best For
1–2 bed homes wanting premium reliability on a mid-range budget.
Common Questions About the Baxi 800 Combi 24
Is the Baxi 800 as good as the Worcester Bosch 4000?
Very comparable. The 800's 94.9% efficiency is slightly better than the 4000's 94%, and the warranty is similar. Worcester Bosch has a marginally better reliability record; Baxi wins on price.
What is included in the Baxi 800 warranty?
Up to 10 years parts and labour when registered with Baxi within 30 days of installation and annually serviced.
Can I pair the Baxi 800 with a Hive or Nest thermostat?
Yes — the Baxi 800 is compatible with most smart thermostats including Hive, Nest, Tado, and the Baxi Uconnect system.
Other Baxi Models We Install
Ready to Get the Baxi 800 Combi 24 Installed?
We supply and install the Baxi Baxi 800 Combi 24 across Corby, Kettering, Northampton, and all surrounding areas. Fixed price, Gas Safe certified.