... Air Source heat pumpModel: AW09,AW09B,AW10,AW10B,AW12,AW12B,AW13,AW13B,AW15,AW15B,AW20,AW20BLow temperature air to water heat pump ... ?1.More than 10 years heat pumps experience ;2.CE certification ,TUV efficiency certification , Designed and Tested by ... than common;SIEMENS controller: humanized display ,alarm automatically , heating system equipments can be controlled;EMERSONE expansion valve control ...