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Why Use Variable Refrigerant Flow Systems in Your Buildings?

Enersolv Multi Zone VRF System Diagram

Variable Refrigerant Flow is a direct expansion, refrigerant-based heating and cooling system. Working under the same principles as a refrigerator, variable refrigerant flow (VRF) uses the evaporation of a liquid to gas, to absorb heat and create cooler temperatures and conversely, from hot gas to liquid, to heat spaces.

System types

  • Cooling and heating only – provides either cooling or heating through simple system architecture, however  only one action can be provided at a time; simultaneous heating and cooling is not possible.
  •  Heat recovery – facilitates the intelligent management of thermal energy in buildings. Heat is removed from spaces that require cooling and redistributed to spaces requiring heating. This use of VRF technology permits individual spaces within complex building portfolios to be separately zoned and controlled. The result is reduced energy usage and increased savings in utility costs.

System benefits

  • Consistent comfort
  • Quiet operation
  • Energy efficiency (Energy savings of 55%)
  • Installation flexibility, great for tight spaces
  • Heat & cool simultaneously
  • Zoned heating & cooling
  • State-of-the-art controls
  • Fewer breakdowns/less downtime

System components

Outdoor condensing unit

  • Transfers energy to and from the outside environment
  • Receives control information on how much liquid or gas refrigerant is required to meet user demand
  • Sends required liquid or gas refrigerant to indoor units

Indoor evaporator unit

  • Transfers energy to and from conditioned area
  • Is controlled independently from all other indoor units
  • Receives liquid or gas refrigerant, dependent on whether heating or cooling is required

System processes

Cooling spaces

  • Indoor units are supplied with liquid refrigerant, controlled by an electronic expansion valve according to the amount of cooling required.
  • The refrigerant evaporates inside a coil in the system. This extracts heat from the space (cooling).
  • The heat is removed from the space and transported for exhaust or use elsewhere.

Heating spaces

  • Indoor units are supplied with hot gas refrigerant, controlled by an electronic expansion valve according to the amount of heating required.
  • The refrigerant condenses inside a coil in the system. This provides heat to the space (heating).
  • Liquid refrigerant may then be used to cool a different space.

Learn more

The Benefits of VRF

Enersolv is a leading specialist in VRF. We have built a reputation for introducing this environmentally sustainable technology to the North American market, using expertise from Europe and Japan, where it is more commonly used.