... 2.CE,CCC,ISO approval 3.R404a available for low temp air to water heat pump water heater ... MD100D1.CE,CCC,ISO approval2.Easy to install , low cost on it , low consumption3.Enery saveing , input power 9.2KW, ... 4).Full automaticlly start and stop according to setup temperature.5).LCD touch- screen controller.6)They use ... to water heat pump water heater MD100D,36kw,low temperature air source heat pump