water source heat pump,water to water heat pump,groud source heat pump,geothermal source heat pump,water cooled heat pump air source heat pump,Heat Pump,Air to Water Heat Pump,air to water mini chiller,air to water standard chiller,Modular Air Cooled Heat Pump,Key ... .2. High efficient finned-tube type and plate type heat exchanger.3. Thermostatic expansion valve to make the unit operate more ...