Our Air to Water DC-inverter heat pump is split type.. This means that the heat pump has one pare outside and one pare inside, The DC Inverter Air to Water heat pump can help you to get heat for: Floor heating & cooling Fan Coil Radiator DHW Swimming Pools advantagement: * DC INVERTER technology; * R410A refrigerant; * High COP up to 3.85; * run at ambient temp:-15 to 35 degree * electrical expansion valve inside; * split type, no danger of freezing; * very low noise * water pump and 3-way valve inside