The family house in Dolní Poustevna has a total heat loss of 45 kW and its heating was originally managed by gas boilers. Operating and energy costs climbed up to 180 000 CZK in one year, so a more economical solution was sought.

The gas boilers were replaced by the IVT AIR X 170 air/water heat pumps, which our company installed at the beginning of June 2015. The requirements for the heating of a large building had to be solved by means of three cascade-connected machines. The internal units are AirBox S 130–170 low-energy circulating pumps, all of which is complemented by a hot water boiler.

The original boilers remained in place and could be used as a 100% backup if needed, if extreme temperature drops or cascade failure occured.