Abbreviation for Variable Refrigerant Flow. It can be translated as Variable Flow Refrigerant Systems.

• An outdoor unit group placed outdoors,
• Numerous indoor units connected to it,
• A precision-controlled automation system,
• copper pipeline,
• It consists of circulating refrigerant gas in the system.

It ensures that the indoor unit is kept under control with a precision of ±0.5°C at independent temperatures connected to the same outdoor unit or outdoor unit group with a single copper pipeline in more than one independent room.