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.
Gas powered VRV / VRF systems. Where the amount of electrical supply is limited and a gas supply is available, gas powered VRF systems can be used. The gas powered VRF system uses a gas powered internal combustion engine in place of the electric compressors in the standard systems.