Glowworm / Saunier Duval
Domestic Heat Exchanger

S1024800

A heat exchanger does precisely what its name describes - it allows heat to be exchanged between two fluids or substances, usually water or gas, without letting the substances mix together.

Within the heat exchanger is a long, coiled pipe. This pipe is surrounded by a substance that can be heated, such as cold water. A hot substance, such as gas or water, is fed through the pipe and, as it moves, it gradually heats the surrounding water. A heat exchanger doesn’t allow these two substances to combine, as this wouldn’t work as effectively - the water can be heated up much faster than if hot water was simply added to cold water.

They allow your boiler to heat the water that is then pumped through your radiators to warm your home.