Use VRF-VAV for VRF HVAC systems to network and remotely access fan coils and reduce the number of indoor units, refrigerant lines, condensate lines, electrical runs and Cost! If the high cost of VRF equipment and installation is keeping you from implementing a VRF system then VRF-VAV IS YOUR SOLUTION. VRF-VAV provides you with a competitive advantage by reducing equipment and installation costs while streamlining your VRF installation.