Their cost is higher than traditional equipment.

Convector and condensation boilers

Convectory boilers are found in every second house, but heat loss reduce efficiency to 90%. 22 kW will go from the unit with a capacity of 25 kW to heating water. Such boilers form water vapor settling on the walls of the case. Modern condenser units work from the efficiency of up to 99%, using the resulting condensate. Their cost is higher than traditional equipment.