China Palm A.C. and Equipment Co.,Ltd supply DC inverter heat pump 9KW with highest COP 6 DC inverter heat pump 9KW with highest COP 5.97 for 9KW DC Inverter air source Heat Pump with Heating and Cooling and domestic hot water functions, R410a, With most advance European technology to work well in Minus -25ºC much more Higer efficiency than normal air source heat pump. Main Characters: 1. Much more higher COP than normal DC inverter heat pump 2. Installation is easy and flexible.. 3. Can be connected with solar water heater system. 4. All water access parts are stainless steel to keep safe, healthy and non-pollution Quality for reliability and save maintenance cost: Our parts are always choosend with the top brand in the world Heat exchanger: SWEP brand plate heat exchanger from Sweden. Heat expansion valve: Emerson brand Four way valve: Saginomiya brand of Japan The above parts enable our heat pump to be trouble free products. www.china-heatpump.com