Is it a good idea to combine a condensing boiler and a thermodynamic boiler?

Yes it is! Combining a condensing boiler and a thermodynamic boiler allows you to harness the 2 most efficient technologies available on the market for your heating and domestic hot water and cut down on your use of fossil fuels. A win-win solution for your pocket and the environment

Why are condensing boilers more efficient?

Of the fossil-fired boilers (natural gas or oil), condensing boilers offer the best yield. This is due to the fact that they recover the latent heat of the water vapour contained in the fumes produced during combustion. In other words, they extract up to the last possible calorie, avoiding any heat is lost.

Thermodynamic boilers: an (almost) free energy supply

For your hot water, you can of course connect your boiler to a hot water storage tank or a water heater and in doing so use the heat produced by the latter for both your heating and domestic hot water. But in winter, when your boiler is off, an electrical resistance takes over to heat your domestic water, which may prove expensive.

Feeding your boiler by another heat source can make a lot more sense! Especially when this heat is (almost) free. The thermodynamic boiler is coupled to a heat pump capable of collecting the calories in the air and injecting them into the water to heat it. This pump uses as little as 1 kWh of electricity for 3 to 4 kWh of free heat recovered from the air! The environment and your bank account will thank you for it!

Condensing boiler + thermodynamic boiler: the best compromise

The way things stand, it is safe to say that the combined technique of condensation + heat pump technology delivers the best compromise. It also makes for the best rational use of fossil fuels.