Specifications

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Specifications are subject to change without notice
31
Figure 26
Concentric Vent and Combustion−
Air Roof Termination
Combustion
Air
Exhaust
36” Min
OR
36” Min
2” (50.8mm) Max
(914.4mm)
(914.4mm)
12 (304.8mm)
Min. Grade or
Snow Level
Figure 27
Concentric Vent and Combustion−
Air Sidewall Termination
“A”
Vent
Dimension “A” is touching or 2″ (50.4mm) maximum separation.
25-22-02dVent
Combustion Air
Exhaust
1 (25.4mm)
Maximum
Exhaust
“A”
“A”
Inlet
Figure 28
Sidewall Inlet Vent and Exhaust−
Air Termination
Dimension “A” is touching or 2″ (50.4mm) maximum separation.
8 Min.
18 (457.2mm) Min. for Cold Climates
[Sustained 0F(-17C) and below for
24 hours or more consecutive hours]
8 (457.2MM) Min.
20 (6.1m) Max.
12 (304.8mm) Min.
Grade or Snow Level
Exhaust
8 Min.
8 Min.
20 Max.
Figure 29
Sidewall Inlet Vent and Exhaust−Air
Termination with Exterior Risers
18 Min. for Cold Climates
(Sustained temperatures 0 F
and below for 24 or more con
secutive hours)
Inlet
“A”
“A”
12 Min.
Grade or
Snow Level
Dimension “A” is touching or 2″ (50.4mm) maximum separation.
Exhaust
Figure 30
Rooftop Inlet Vent and Exhaust−
Air Termination
25-22-43
18 Min. for Cold Climates
(Sustained temperatures
0 F and below for 24 or
more consecutive hours)
Inlet
12 (304.8mm)
Min. Grade or
Snow Level
8 (203.2MM) Min.
20 (6.1) Max.
18 (457.2mm) Min. for Cold Climates
[Sustained 0F(-17C) and below for
24 hours or more consecutive hours]