A variable refrigerant flow (VRF) HVAC system is a newer innovation. This system is sometimes called a VRV or variable refrigerant volume system, but VRF is more common.

VRF systems have one compressor and one condenser in their outdoor unit that sends refrigerant and air to multiple evaporators in the indoor unit. This system’s two units connect with control wires that regulate the refrigerant flow to each evaporator in the indoor unit.

The control wires vary with the compressor’s speed according to the evaporators’ refrigerant needs, hence the “variable” in the VRF system’s name. Ideal for large structures, VRF systems simultaneously heat and cool different parts of commercial facilities. Their flexible design works efficiently with any application, and their compact size and smaller weight make the commercial HVAC installation process extremely flexible.

With its heat recovery system and ability to heat and cool different parts of a building thanks to its multiple indoor units, VRF technology is increasingly becoming more common in the United States. And while these systems are costly at around $18 per square foot compared to the usual $12-15 per square foot, industry experts have found that these rates have paid off for extensive commercial facilities, contributing to overall energy savings.