The Baxi Duo-tec Combi 28 heats your radiators and gives you hot water straight from the mains, with no tank or cylinder. It’s compact enough to fit in a kitchen cupboard, and it’s a dependable choice for most small and medium-sized homes. See your fixed price in our online quote.
Key specs
| Spec | Baxi Duo-tec Combi 28 |
|---|---|
| Boiler type | Combi, condensing, wall mounted |
| Fuel | Mains gas |
| Central heating output | 25.9 kW |
| Hot water output | 28 kW |
| Hot water flow rate | 11.5 l/min |
| Efficiency | 92%, A-rated (ErP: A heating, A hot water) |
| Manufacturer warranty | 7 years* |
| Dimensions (H x W x D) | 780 x 450 x 345 mm (approx.) |
*The warranty depends on installation by a Gas Safe registered engineer and an annual service.
Who it suits
- Homes with one or two bathrooms and up to about 15 radiators.
- Households replacing an old combi, or swapping a tank-and-cylinder system for something that frees up space.
- If you have a smaller flat, the Duo-tec Combi 24 may be enough. Busier homes with more bathrooms should look at the Duo-tec Combi 33 or 40.
Why people choose it
- Lower running costs: at 92% efficiency, very little heat is wasted.
- Hot water whenever you need it: water is heated as it’s drawn, so there’s no waiting for a tank to warm up.
- Easy to live with: a clear digital display, quiet running and built-in frost protection.
FAQs
Do I need a hot water tank with the Duo-tec Combi 28?
No. It’s a combi boiler, so it heats water directly from the mains, and any existing cylinder and loft tank can usually be removed.
How long is the warranty?
Baxi gives 7 years, provided it’s fitted by a Gas Safe registered engineer and serviced every year.
Is 28 kW the right size for my home?
It suits most homes with up to two bathrooms and around 15 radiators. Our online questions check this for you before you see your price.
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.