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30
Combustion
Air
Exhaust
12″
″
(304.8mm)
Min. Grade or
Snow Level
36” M in
2” (50.8mm)Max
36”Min
OR
(914.4mm)
(914. 4mm )
A07718
Fig. 26 -- Concentric Vent and Combustion-- Air
Roof Termination
“A”
Vent
Dimension “A” is touching or 2″ (50.8mm) maximum s eparation.
25--22--02d
Vent
Combustion Air
1
″
(25.4mm)
Maximum
Exhaust
A07695
Fig. 27 -- Concentric Vent and Combustion Air
Sidewall Termination
12″
″
(304.8mm) Min.
Grade or Snow Level
8
″
(457.2mm) Min.
20
′
(6.1m) Max.
“A”
“A”
Exhaust
Inlet
Dimension “A” is touching or 2″ (50.8mm) maximum separation.
18
″
(457.2mm) Min. for Cold Climates
[Sustained 0
°
F(-17
°
C) and below for
24 hours or more consecutive hours]
8
″
Min.
A07696
Fig. 28 -- Sidewall Inlet Vent and Exhaust-- Air Termination
Exhaust
8
″
(203.2mm) Min.
Inlet
“A”
“A”
Dimension “A” is touching or 2″ (50.8mm) maximum separation.
12
″
(457.2mm)
Min. Grade or
Snow Level
18
″
(457.2mm) Min. for Cold Climates
[Sustained 0
°
F(-17
°
C) and below for
24 hours or more consecutive hours]
8
″
(203.2mm) Min.
20
′
(6.1m) Max.
A07697
Fig. 29 -- Sidewall Inlet Vent and Exhaust-- Air Termination
with Exterior Risers
12″
″
(304.8mm)
Min. Grade or
Snow Level
Exhaust
8
″
(203.2mm) Min.
20
′
(6.1m) Max.
25--22--43
Inlet
18
″
(457.2mm) Min. for Cold Climates
[Sustained 0
°
F(-17
°
C) and below for
24 hours or more consecutive hours]
A07698
Fig. 30 -- Rooftop Inlet Vent and Exhaust--Air Termination
58HDV