Heat pump technical parameters should be always compared at same conditions; e.g. A2°C/W35°C in the air – water system means: primary heat source inlet temperature (external air) of 2°C, heating water outlet temperature of +35°C (floor heating use)
In the event of exterior compact models there is to be included also warming up the compressor and the condensate drain well (in evaporator defrosting) in electric power demand
Not the heating factor of the heat pump itself is important but the heating factor of the whole system during the season of heating
Choose a heat pump with high quality components (spiral compressor, stainless steel evaporator, corrosion resistant materials in the event of exterior models)
Find out heat pump parameters at external temperatures of -15°C, -20°C or -25°C
Verify the outfit of your heat pump and what will be further necessary for its installation (regulation of the whole heating system, service hot water tank, buffer tank, putting your heat pump into operation)
