The fan is the component that injects fresh air in to the combustion chamber, allowing the gas to be burnt correctly. It also extracts the toxic gas after the combustion process is complete. The boiler has safety features in place to make sure no gas can
Fits multiple appliances
Technical specification
Waist Sizead18cg11gsToilet Cistern CapacityFTW--Supplier Part Number402A1678Manufacturer Model No4521351Brand NameThorn