Variable Refrigerant Flow (VRF)

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Variable refrigerant flow (VRF) is an HVAC air source heat pump technology.  VRF uses refrigerant as the cooling / heating medium, and allows one outdoor condensing unit to be connected to multiple indoor evaporators, each individually controllable by its user, while modulating the amount of refrigerant being sent to each evaporator. By operating at varying compressor speeds, VRF units work only at the needed rate. Heat recovery VRF technology allows individual indoor units to heat or cool simultaneously as required, while the compressor load benefits from the internal heat recovery. Certain systems allow heat to be harvested from one zone and delivered to another zone further reducing the load on the condenser. Energy savings of up to 55% are predicted over comparable unitary equipment.

Variable Refrigerant Flow (VRF) is a technology introduced as a system to minimize efficiency losses found in conventional HVAC systems and provide sustainable energy benefits. An air source VRF system is engineered to minimize or use no ductwork, and save on the cost of large distribution fans, multiple water pumps operation and water piping.  On certain systems up to 20 indoor units can be connected to each outdoor unit, producing a total applied capacity of up to 150% of the outdoor unit's rated capacity.  Energy efficient and easy to design, install, and maintain, a VRF system has the lowest life cycle cost of any system on the market today.