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Concentric Vent and Combustion- -
Figure 23
Air Sidewall Termination
Combustion Air
Exhaust
Vent
Dimension "A" is touching or 2² maximum separation.
Sidewall Inlet Vent and Exhaust- -
Figure 24
Air Termination
Exhaust
"A"
Inlet
12² ² ² ² Min. Grade or
Snow Level
Dimension "A" is touching or 2² maximum separation.
Sidewall Inlet Vent and Exhaust- -Air
Figure 25
Termination with Exterior Risers
18² ² ² ² Min. for Cold Climates
(Sustained Below 0° ° ° ° F)
8² ² ² ² Min.
20¢ ¢ ¢ ¢ Max.
Exhaust
"A"
Dimension "A" is touching or 2² maximum separation.
440 01 1020 02
1² ² ² ² Maximum
(TYP.)
Vent
"A"
25--22--02d
"A"
8² ² ² ² Min.
8² ² ² ² Min.
20¢ ¢ ¢ ¢ Max.
18² ² ² ² Min. for
Cold Climates
(Sustained Below 0° ° ° ° F)
8² ² ² ² Min.
12² ² ² ² Min.
Grade or Snow
Inlet
Level
"A"
Rooftop Inlet Vent and Exhaust- -
Figure 26
Air Termination
18² ² ² ² Min. for Cold Climates
(Sustained Below 0° ° ° ° F)
Inlet
12² ² ² ² Min.
Grade or Snow
Level
Recommended Alternate
Figure 27
Installation for Sustained Cold
Weather (- -0° ° ° ° F & below)
12² ² ² ² MIN.
EXHAUST
90° ° ° °
FRONT VIEW
12² ² ² ²
Same Joist
Space
8² ² ² ² Min.
20¢ ¢ ¢ ¢ Max.
Exhaust
25--22--43
OVERHANG
INLET
12² ² ² ² MIN. Ground Level
OR Snow Level
SIDE VIEW
12² ² ² ²
25- 23- 73
25
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