Worcester Bosch Greenstar 4000 system liquified petroleum gas system boiler is a 21 kW wall mounted condensing system boiler with improved efficiency for an ErP A rating. This high performance wall mounted boiler is user friendly and offers straight forward servicing.

• 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 60/100mm 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 42 decibel with an intuitive, long text, colour boiler display for ease of use
• 7 Years guarantee extended to 8 years when installed with any Greenstar system filter