Selkirk 3"/4" Appliance Connector (Direct-Temp Multi-Fuel)Selkirk 3" 4" Appliance Connector Inlet end connects to the appliance and the outlet connects to the Pellet Stove Adapter or to the Tee if venting vertically. Direct Temp Multi Fuel System Direct Temp Multi Fuel converts any conventional biomass appliance into a Direct Vent system. This unique venting system is designed to withstand the corrosive flue gases obtained when burning bio fuels. The all stainless steel construction features an inner liner