The Glow-worm end tip is a heat exchanger component found in boilers such as the Buckingham 4, Compact, Micron, Hideaway, and SD. The heat exchanger transfers heat from the burner of a boiler to the water. Only combi boilers feature a secondary heat exchanger, which allows heat to be transferred between closed systems. All boilers have a primary heat exchanger, which uses heat from a burner to raise the temperature of the water in the system.

Brand Name	Glow-worm