Utilizing heat exhaust, condensing boilers achieve an efficiency of up to 109% compared to 90% of conventional.
Conventional boilers do not exploit the energy that exhaust has in the form of heat and leaves through the chimney. Through technology of condensation by burning the same amount of gas the absorbed energy in the heating circuit is more due to high temperature of the exhaust.
Specifically, the heat recovered is divided into sensible and latent (condensation) heat. Sensible is the heat is recovered from the exhaust gases which now escapes from the chimney at a much lower temperature. While latency is the heat released by the condensation of water vapor contained in the exhaust gases, the phase change from gas (steam) to liquid phase (water).