) Capacity range: 3.5kw, 5kw and 7kw. 2) The cop can reach: 3.75-3.85. 3) Can be used for floor heating, fan coils, water heaters and also swimming pools, and modern radiators. 4) Our product of DC Inverter air to water heat pump/ DC Inverter air source heat pump can be equipped with quick coupling system ( easy for installation, D.I.Y installation). 5) With CE, RoHS standard