How does a condensing boiler work?

How does a condensing boiler work?

Question:

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Answer: a condensing boiler reuses the steam released from combustion to heat the water.

Condensing boilers are part of the new generation of boilers put on the market in recent years. They have the particularity of recovering the water vapor resulting from combustion instead of rejecting it, in order to reuse it to heat the water returning from the radiators in the central heating circuit. When the water vapor has transmitted its heat, it condenses, and can then be evacuated by the waste water pipe. The re-use of the heat of water vapor thus allows substantial energy savings, up to 30% in some cases. The condensing system works exclusively with wood, gas and oil boilers. And it gives right to a tax credit which reduces its purchase price enough to make this investment very attractive.