SUOHER air source heat pumps perform good heating in Sweden. Suoher 11kW air to water heat pumps for heating and hot water use, are running quite stable and strongly now in the whole 2017 and 2018 winter in Sweden. This heat pump model adopts Copeland Scroll R410A compressor, electronic expansion valve with superheat control. The running noise is quite low, no matter in normal heating or in defrosting.