Vrf how does it work

Variable refrigerant flow VRF systems are gaining in popularity and are used as an enhanced version of multi-split systems, featuring simultaneous heating and cooling as well as heat-recovery capabilities. Modern VRF systems provide some major advantages, such as zoning, individual temperature control, minimized ductwork, excluding the need for secondary fluids chilled-water or hot-water distribution , and associated costs. This all-electric technology consists of a single outdoor condensing unit, multiple indoor units serving various zones, refrigerant piping with branch selectors, and associated controls.

VRF systems use RA refrigerant as the heat-transfer fluid and the working fluid, achieving a very high energy efficiency ratio EER of 15 to 20 and integrated energy efficiency ratio IEER of 17 to In recent years, gas heat pump technology has been increasingly used in certain applications where natural gas utilities offer incentives. As a result, VRF systems can contribute a great number of points toward U.

VRF systems are nontraditional HVAC systems, in comparison with conventional ducted systems circulating the air or chilled-water throughout the building. The term VRF indicates the ability of the system to vary and control the refrigerant flow through multiple evaporator coils to provide individual temperature control in various mechanical comfort zones.

Using direct expansion DX as part of the basic refrigeration cycle, VRF systems transfer the heat from the room directly to evaporator coils located within the conditioned space.

The heat-transfer media, in this case, is the refrigerant, which delivers heating and cooling to various zones with less energy as compared with air or water. VRF systems act as multi-split systems, connecting multiple indoor units with one centralized outdoor condensing unit assembly, providing simultaneous heating and cooling and heat recovery in various zones as follows:.

Air-cooled , where multiple compressors are connected to a refrigerant-piping loop. The compressor unit recovers heat generated in spaces during the cooling process and uses it to heat other spaces, and recovers cooled air to use in the heating process.

The compressor is designed to provide refrigerant at a variable rate. The official name for this technology is variable refrigerant flow VRF.

It generally operates much more efficiently than conventional HVAC compressors of a similar size. The fan coils configurations can be customized to your space and needs. We can mount them at floor level, in the walls, or in the ceiling. The fan coils condition the air and then recirculate it. Not only are VRF systems extremely versatile, but they allow for a higher level of customization than any other HVAC set-up without requiring existing ductwork.

On your end, VRF systems can also be easier to install because their equipment not only weighs less but does not require the installation or complex retrofitting of ductwork. Still, learning how to properly design and install a VRF system for any given space does require specialized training and experience. Ready to add VRF systems to your list of offerings? Contact us today! Your email address will not be published.

Currently you have JavaScript disabled. As for the Control, each indoor is controlled by its own wired control panel, while there are some possibilities for wireless remotes IR and centralized controllers, enabling controlling all indoors from one location. The system gets inputs from the user e. According to that data, it implements its logic in order to get to the desired comfort conditions, utilizing optimal power consumptions. The ability to adjust itself to the outdoor conditions is one of the main factors that makes these systems so efficient, compared to the traditional water cooled systems, based on chillers and fan coils.

At this point, it will examine the outdoor conditions temperature , the operating indoor requirements operation mode, set point temperature , and will operate the compressor at the exact level, required to comply with the indoor requirements.