Worcester Bosch Greenstar 4000 15 kW Liquefied Petroleum Gas (LPG) System Boiler is the direct upgrade for it's predecessor the Greenstar 15Ri LPG and is most suited to small to medium sized homes with one bathroom. It features a modern new design, a full colour text display that is easy to use and it is exceptionally quiet too. The Greenstar 4000 has a wide power range to meet all of your heating and hot water needs, whilst doing so efficiently.

• 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 42dB(A)) with an intuitive, long text, colour boiler display for ease of use
• Can be used with Greenskies solar panels for energy and cost savings