UHD S TANDARD D UCT FURNACE INSTALLATION OPERATION AND S ERVICE M ANUAL16 of 55Figure 12: Concentric Vertical and Horizontal Vent Termination - Separated Combustion HeaterVent**Air Intake*ConcentricVent BoxVerticalOptionHorizontalOptionConcentricVent BoxVent**CombustionAir Terminal 12" (31 cm) Minimumfrom roof to combustionair terminalVent Terminalwith Baffle PlateFlashing(By Others)4" (10 cm)Type B-1 VentStorm Collar (By Others)(Attach with 3 sheet metal screws.)UHDS 150-250:6" (15 cm) DiameterSingle WallUHDS 300-400:8" (20 cm) DiameterSingle WallAir Intake*6" (16 cm)Minimum12" (31 cm)MaximumCombustionAir TerminalVent Terminalwith Baffle Plate4"(10 cm)TypeB-1VentStorm Collar(By Others)(Attach with 3sheet metalscrews.)6" (16 cm) Minimum12" (31 cm) Maximum10' (3 m)MaximumNOTE: Vent supports notshown. Duct supportsnot shown. Duct andvent supports notprovided by themanufacturer.12" (31 cm)Minimum from wall to combustion air terminalDescription Part Number Qty.Concentric Vent Kit (150 - 250) UHVK1Concentric Vent Box Top & Side Assembly 90504113 1Concentric Vent Box Bottom Assembly 90504112 1Screw #6 x 3/8 Self Drilling 91119100 144" (10 cm) Vent Terminal with Baffle Plate 90502102R 16" (15 cm) Combustion Air Terminal 90502103 1Description Part Number Qty.Concentric Vent Kit (300 - 400) UHVK2Concentric Vent Box Top & Side Assembly 90504013 1Concentric Vent Box Bottom Assembly 90504012 1Screw #6 x 3/8 Self Drilling 91119100 144" (10 cm) Vent Terminal with Baffle Plate 90502102R 18" (20 cm) Combustion Air Terminal 90502104 1Model **Vent DiameterUHD[T][M][X]S[R] 150 - 250 4" (10 cm)Model *Air Intake DiameterUHD[T][M][X]S[R] 150 - 250 4" (10 cm)UHD[T][M][X]S[R] 300 - 400 5" (13 cm)
