Glowworm Glow-worm 801635 heat exchanger door seal

This part is located within the heat exchanger section. There are two kinds of heat exchanger that can be installed the primary heat exchanger and the secondary heat exchanger. The primary is present in almost all boilers and uses heat from the burner to raise the temperature of water within the system. The secondary heat exchanger is exclusive to combination boilers and allows the heat to be transferred between 2 closed systems. Genuine glow-worm spare part Fits glow-worm gas boilers Brand:Glow-worm Model Number:801635