System Boilers

The Worcester Bosch Greenstar 4000 30kW System Gas Boiler is a condensing system boiler for large homes with up to 18 radiators and 2-3 bathrooms, requiring a cylinder. It provides a 30kW output and a 94% efficiency rating (ErP A-rated). Measuring 710x400x330mm and weighing 33kg, it’s cupboard-friendly. It includes a 1:10 modulation ratio, a stainless steel heat exchanger, and EasyControl. It supports natural gas and offers a 7-year warranty, extendable to 10 years with a filter and Excelerate installer. Perfect for expansive homes.

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