Alpha Fan Assembly 1.021967 is the device that introduces fresh air in to the combustion chamber,allowing the gas to be burnt correctly it also extracts the noxious gas after the combustion process is complete. The boiler has safety parameters in place to make sure no gas can be passed through to the main burner if the fan is not functioning correctly.Alpha HE CB 25.
Alpha Fan Assembly 1.021967 is a Genuine Alpha Spare Part and is present in different range of Alpha boilers, including the Alpha HE CB25, HE SY 25.This Alpha fan fits the HE 25 boiler.This is a Genuine part.
Always refer to manufacturers instructons, and use Genuine Alpha Parts.