The Worcester Bosch Greenstar 4000 25kW Combi heats your radiators and gives you hot water straight from the mains, with no tank or cylinder. It is a solid choice from Worcester Bosch, and you can see your fixed installed price online in a couple of minutes. See your fixed price in our online quote.
Key specs
| Spec | Worcester Bosch Greenstar 4000 25kW Combi |
|---|---|
| Boiler type | Combi, condensing, wall mounted |
| Fuel | Mains gas |
| Central heating output | 24 kW |
| Hot water output | 25 kW |
| Hot water flow rate | 10.2 l/min |
| Efficiency | 94%, A-rated (ErP: A heating, A hot water) |
Who it suits
- Smaller to medium homes with a modest number of radiators.
- Larger homes with more radiators should consider the Greenstar 4000 30kW.
Why people choose it
- Efficient: 94% efficiency, A-rated for heating and hot water.
- Planet-friendly packaging: Delivered in fully recyclable packaging.
- Trusted brand: A Worcester Bosch boiler built for UK homes.
FAQs
Is 25 kW enough for my home?
It suits smaller to medium homes. Our questions check your home size and radiators before you see a price.
What flow rate does it give?
10.2 litres of hot water a minute.
Does it need a tank?
No. It is a combi and heats water on demand.
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.