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