Greenstar 21 RI ErP+

It is a compact, regular gas boiler with a central heating output of 21kW. It is ideal for small and medium-sized homes with up to 10-15 radiators and 1-2 bathrooms. The boiler has an ErP A-rating for heat efficiency, meaning that it is very efficient at converting fuel into heat, which can help you to save money on your energy bills.

ErP A-rating for heat efficiency.

10-year warranty.

Smart thermostat compatibility for more efficient heating and hot water control.