Worcester Bosch Greenstar 4000 12 kW system boiler is a best fit for small to medium-sized houses with one bathroom. It has a fresh new look, an intuitive full-colour text display and is also very quiet.

• 100 Percent planet friendly packaging
• Front access to all key components
• Longer flue lengths up to 12 m (60/100)
• Intuitive full colour long text display
• 500 ml condensate siphon
• Quiet operation from 42 dB
• Modulates down to 1.9 kW central heating output
• Full flow rates from 1 bar mains pressure
• Increased DHW efficiency whilst reducing waste water
• Compatible with Greenstar intelligent Filling System