How do condensing boilers help reduce energy bills compared to non-condensing boilers

Condensing boilers reduce energy bills by capturing and recycling heat from exhaust gases, making them more energy-efficient than non-condensing boilers.

Reply 1

Joinedup

Part of the combustion products of natural gas is water (as vapour)

You can get some heat out of the water vapour and into your radiator water by condensing it back to liquid water on a heat exchanger before ejecting it into the atmosphere.