Worcester Bosch Greenstar 4000 Combi Natural Gas Boiler 25 kW offers an attractive design, improved installation and excellent performance. ErP A-rated for energy efficiency and water heating efficiency, this 25 kW condensing combi boiler includes an intuitive display panel for ease of use.

• Ease of installation simple switch to previous Worcester i system models with pre-piping jig offering rear piping as standard
• Flexibility of siting provided by long flue lengths (up to 12 m with 60 mm/100 mm flues) and a 500 ml integrated condensate siphon to reduce the risk of freezing
• Wide modulation range designed to optimise efficiency when heating demand is low
• High-end design, quiet operation (up to 45 dB (A)) with an intuitive, long text and colour boiler display offering optional intelligent filling solutions
• 7 Years guarantee extended to 8 years when installed with any greenstar system filter
• Quiet operation from 42 dB (A)
• Modulates down to 3 kW central heating output (1:10)
• Compatible with our Greenstar intelligent filling system
• Intuitive full-colour long-text display
• 100 Percentage planet friendly packaging