Condensing and Non-Condensing Boilers

A condensing boiler has a special heat exchanger to remove heat from the flue gases.  The flue gases are thus at a lower temperature.  The overall efficiency of the boiler is increased.  Condensing boilers can have an efficiency as high as 95%.

In many countries, the use of condensing boilers is mandatory.  Many governments give financial incentives to install condensers in boilers.