What is the definition of a VRF Heat Pump? A VRF Heat Pump is a type of air-source heat pump system that uses variable refrigerant flow technology. This type of system is able to provide both cooling and heating capabilities and can be used in both residential and commercial settings. It is a highly efficient way to manage temperatures and can save energy and money. The VRF Heat Pump takes advantage of the compressor’s variable speed to adjust the refrigerant flow rate and keep the indoor temperatures at the desired level. Refrigerant is pumped from the outdoor unit to the indoor unit and then circulated through the coils to extract and transfer the heat. This system is much more efficient than traditional air-source heat pumps, as it can deliver the same amount of heat or cooling with less energy. The VRF Heat Pump has a wide range of applications, from providing efficient cooling in summer to providing effective heating in winter.