The Baxi Duo-tec Combi 40 heats your radiators and gives you hot water straight from the mains, with no tank or cylinder. You can check your fixed installed price online in a couple of minutes. See your fixed price in our online quote.
Key specs
| Spec | Baxi Duo-tec Combi 40 |
|---|---|
| Boiler type | Combi, condensing, wall mounted |
| Fuel | Mains gas |
| Central heating output | 34.4 kW |
| Hot water output | 40 kW |
| Hot water flow rate | 16.4 l/min |
| Efficiency | 92%, A-rated (ErP: A heating, A hot water) |
| Manufacturer warranty | 7 years, with Gas Safe installation and an annual service |
| Dimensions (H x W x D) | 780 x 450 x 345 mm |
Who it suits
- Homes with 2–3 bathrooms and several people using hot water.
- Up to about 15 radiators. Smaller homes should choose a lower Duo-tec output.
Why people choose it
- Strong flow: 16.4 litres a minute.
- Smart-ready: Works with Baxi uSense, Nest and Hive.
- Easy controls: LCD display.
FAQs
How many radiators can the Duo-tec 40 run?
Up to about 15, with plenty of hot water for several bathrooms.
Does it work with smart thermostats?
Yes, including Baxi uSense, Nest and Hive.
What warranty does it have?
7 years, with an annual service.
Get your fixed price online
Answer a few quick questions about your home and current boiler. You’ll see a fixed installed price straight away and can book online.