Variable refrigerant flow or VRF systems use refrigerant as both the cooling and heating medium.
This type of system typically consists of an outdoor unit linked to multiple indoor units and avoids the need for ductwork.
VRF technology is often used for commercial application because it caters to the specific demands of different zoes and offers a modular design that easily accommodates expansion. Plus the outdoor units are exceptionally compact and lightweight, allowing it to be located on the roof or even tucked into a service elevator. Variable motor speeds and refrigerant flow add up to exceptional energy efficiency, often saving over 50% on utility costs. Reacting to the outdoor ambient temperature and the indoor thermostat setting, the VRF system operates the compressor at the precise level necessary to achieve perfect comfort. When another indoor unit is activated, the outdoor unit automatically recalculates the requirements from every indoor unit and increases the compressor load to match demand. The ability of this technology to adjust makes it far more energy efficient than most alternative types of temperature control. This method of operation avoids temperature fluctuations. In more traditional systems, the compressors are either off or on, and temperature swings occur whenever it stops and starts again. Because the VRF system varies the speed of the compressor, it operates continuously for longer periods and maintains even and ideal comfort at all times. A major benefit of VRF systems is the opportunity for simultaneous heating and cooling. One indoor unit can be set to cooling while another provides heating. To further trim costs, the heat drawn from the area requiring air conditioning can be redirected and used in the room that requires heating.