These are similar to multi-split systems, although they suit larger facilities as they have a larger heating and cooling capacity and have the flexibility of longer pipe runs along with the potential for increased numbers of indoor units. VRV/VRF systems can also offer simultaneous heating and cooling at any one time, when this occurs the energy is recovered within the system basically providing free cooling or heating. These systems can also be connected to heat pump boilers providing a source for heating the building also via a LPHW battery in an AHU, under floor heating or used as a primary source for heating the buildings domestic hot water supply. The VRV/VRF system can also be connected to door curtains.
There are a multitude of different indoor fan coil units to suit most applications, such as 4, 2 and 1 way blow ceiling cassette units, 1 way blow ceiling suspended units, above ceiling ducted units, low level wall units both exposed and hidden and finally high level wall units.