Glow-worm 0020186153 heat exchanger

This Glow-worm heat exchanger is a replacement part suitable for Betacom 3, Betacom 4, Energy, Easicom 2, Energy 7, Sustain, Ultimate 2 and Ultimate 3 boilers. The heat exchanger transfers heat from a boiler's burner to water. A primary heat exchanger is found in all boilers, using heat from a burner to raise the temperature of the water in the system while a secondary heat exchanger is present only in combis and allows the heat to be transferred between closed systems.