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SECTION 7: VENTING
17 of 47
Figure 11: Separated Combustion Heater - Vertical and Horizontal Vent Termination
Figure 12: Concentric Vent Box
Model
Air Intake &
Vent Diameter
Part Number
UHD[X]S 75 - 125 4" (10 cm) 90502102
4" (10 cm) Single
Wall Vent Pipe
(By Others)
Seal joint between single wall
and Type B vent with silicone sealant.
Use 3 sheetmetal
screws equally
spaced around joint.
Use 3 sheetmetal
screws equally
spaced around collar.
Concentric
Vent Box
6" (15 cm) Single
Wall Inlet Air Pipe
(By Others)
One piece of 4" (10 cm) diameter, 1/4" (6 cm) airspace type
“B” vent. Selkirk Model RV or equivalent. (By others)
Combustion Air
to Heater
Toward
Outside
Exhaust
from Heater