- 100% planet friendly packaging
- Front access to all key components
- Longer flue lengths up to 12m (60/100)
- Intuitive full-colour long-text display
- 500ml condensate siphon
- Quiet operation at 45dB(A)
- Compatible with our Greenstar Intelligent Filling System
- Modulates down to 3kW central heating output (1:10)
- Increased DHW efficiency whilst reducing waste water
- Full flow rates from 1 bar mains pressure
![Worcester Bosch Greenstar 4000 Combi Boiler](http://batleydiy.co.uk/cdn/shop/files/435649_20210917095208_1024_cd93343e-cbf4-4f93-b9bc-1498f1bb8a15.jpg?v=1723859804&width=1445)