Selkirk 3"/4" 90 Degree Screened Termination Elbow (Direct-Temp Multi-Fuel)Selkirk 3" 4" 90 Degree Screened Termination Elbow Used to terminate a horizontal system. Directs the exhaust down. 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 of superferritic Stainless Steel. A leak