By default, UPnP port forwarding is set to Off. To configure UPnP port forwarding: Browse to My Fiber; then select Network from the Navigation menu ( ). From the Network settings pane, select Advanced; then click Ports to display the Ports tab.
Variable refrigerant flow. Variable refrigerant flow (VRF), also known as variable refrigerant volume (VRV), is an HVAC technology invented in Japan by Daikin company in 1982. Like ductless minisplits VRFs use refrigerant as the cooling and heating medium.
VRV/VRF systems can be used for cooling only, heat. pumping and heat recovery. On heat pump models. indoor units can be in either mode but all must be in. the same mode if served by the same out door unit. large, sophisticated, efficient multi-splits. The heat. recovery or simultaneous mode systems provide both.