The Worcester Bosch
Greenstar 4000.
A 12kW system boiler from Worcester Bosch — installed in a single day by Gas Safe registered engineers.
Built for real homes.
Not showrooms.
The Worcester Bosch Greenstar 4000 12kW is designed to work quietly, efficiently, and reliably — for years to come.
- Quiet Operation
- 12kW heat output — System boiler
- 12kW central heating output
- 8 year manufacturer warranty
- 94% ErP efficiency rating
One price.
Everything covered.
No surprise add-ons. Your quote covers everything needed for a complete installation that meets all gas safety regulations, carried out by Gas Safe registered engineers.
Price and installation time varies depending on your installation requirements. Answer a few quick questions to get your exact fixed price.
Get your free quoteThe numbers
that matter.
Worcester Bosch Greenstar 4000 12kW
The Worcester Bosch Greenstar 4000 12kW combines quiet operation with a modern full-colour display and intuitive controls. Designed as part of Worcester Bosch's latest generation of system boilers, it delivers reliable heating performance alongside an easy-to-use interface.
Quiet Mark approval, Bosch EasyControl compatibility and a contemporary redesign help make the Greenstar 4000 12kW one of the most user-friendly system boilers in the Worcester Bosch range.
Don't let cost get
in the way of warmth.
Spread the cost of your new boiler over monthly payments that fit your budget. Available through iDeal4Finance — apply in minutes.
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