Condensing Boilers

Is my boiler a condensing boiler?

Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency (typically greater than 90% ). By condensing water vapour in the exhaust gases. So recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain.

Condensing boilers have all the same components as a non-condensing boiler. The difference is the amount of heat that can be used from the same amount of fuel burnt.

  • If your boiler was installed after 2005, chances are it is a condensing model.
  • The boiler manual will have it in the name of the product or there will be HE after it.
  • If the flue is made of plastic and steam is visible during operation.
  • There should also be a white plastic pipe coming from underneath the boiler leading to a drain.