variable refrigerant volume, a protected trademark for the system developed by Daikin and now copied by many others who have to refer to it as vrf

Variable Refrigerant Volume. Is a type of system consisting of anywhere up to 40 indoor units connected to one outdoor condensing unit. The refrigerant flow is varied by using either an inverter controlled variable speed compressor, or multiple compressors of varying capacity to respond to changes in the cooling or heating requirement. VRV systems are suitable for offices, restaurants, hotels, theatres, hospital, universities and industrial buildings among others. They are highly versatile and come with a variety of indoor units.

Trade mark for Daikin VRF systems