Variable Refrigerant Flow (VRF) HVAC systems consist of outdoor units connected to multiple indoor units via refrigerant piping to provide cooling and heating to individual zones. VRF System is among the most versatile and powerful air conditioners, offering a cost-effective system and an easier installation. Between reduced installation, and labor and operational costs due to efficiencies, these systems can become a better choice in terms of energy savings, remarkable comfort, and temperature precision. VRF systems may be air or water cooled.