Service manual

SECTION 7: VENTING
15 of 59
Figure 8: Separated Combustion Heater - Vertical and Horizontal Vent Termination
Model **Vent Diameter Part Number
UHA[T][M][X]S 150 - 400 4" (10 cm) 90502102
Model *Air Intake Diameter Part Number
UHA[T][M][X]S 150 - 250 4" (10 cm) 90502102
UHA[T][M][X]S 300 - 400 5" (13 cm) 90502105
Figure 9: Concentric Vent Box
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) or 8" (20 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
4" (10 cm) or
5" (13 cm)