The Worcester Bosch Greenstar 4000 12kW System Gas Boiler is a compact and efficient heating solution for small to medium-sized homes. Designed as the direct upgrade to the Greenstar 12Ri, this modern system boiler combines reliable heating performance with quiet operation, intuitive controls and flexible heating management.
With its wide modulation range, the Greenstar 4000 can adjust its output to suit heating demand, helping to optimise gas consumption and improve overall efficiency. The modern boiler design is complemented by a clear full-colour text display, making everyday operation simple and straightforward.
The Greenstar 4000 12kW is designed for heating systems that incorporate a separate hot water storage cylinder, making it a suitable option for homes using stored hot water. Its exceptionally quiet operation also makes it a practical choice where the boiler is positioned close to living areas.
For additional control and convenience, the boiler supports wireless connectivity with Bosch EasyControl. It can also be integrated with Greenskies solar panels, providing an option for homeowners looking to combine their heating system with renewable energy technology.
Key Features:
12kW Worcester Bosch Greenstar 4000 system gas boiler
Product code: 7733600377
Designed for small to medium-sized homes
ErP A-rated efficiency
Wide modulation range helps optimise gas consumption
Suitable for heating systems with a hot water storage cylinder
Modern, compact design
Easy-to-use full-colour text display
Exceptionally quiet operation
Wireless connectivity with Bosch EasyControl
Compatible with Greenskies solar panels
Direct upgrade for the Worcester Bosch Greenstar 12Ri