Installation & Operation Manual
4 Sidewall direct venting (continued)
Vent/air termination – sidewall
Figure
TO BOILER
INTAKE AIRCOUPLING
CONNECTION
12” MIN
15” MAX
FROM BOILER
VENT PIPE
CONNECTION
BIRD SCREEN
12”
MIN
BIRD
SCREEN
GRADE OR
SNOW LINE
ALTERNATE VENTING ARRANGEMENT
(IF SPACE PERMITS)
Figure
6.Locate terminations so they are not likely to be damaged by foreign objects, such as stones or balls, or subject to buildup of leaves or sediment.
Figure 4-2A Clearance to Gravity Air Inlets
12"
MIN.
VENT / AIR
TERMINATION
12" 
MIN.
12" 
MIN.
BIRD SCREEN
TO BOILER
INTAKE AIR
CONNECTION
12" (305 MM) MIN 15" (381 MM) MAX
FROM BOILER
VENT PIPE
CONNECTION
12" (305 MM) MIN
GRADE OR
SNOW LINE
5.Maintain clearances as shown in FIG.’s
a.Vent must terminate:
•At least 6 feet from adjacent walls.
•No closer than 12 inches below roof overhang.
•At least 7 feet above any public walkway.
•At least 3 feet above any forced air intake within 10 feet.
•No closer than 12 inches below or horizontally from any door or window or any other gravity air inlet.
b.Air inlet must terminate at least 12 inches above grade or snow line; at least 12 inches below the vent termination; and the vent pipe must not extend more than 24 inches vertically outside the building as shown in FIG.
c.Do not terminate closer than 4 feet horizontally from any electric meter, gas meter, regulator, relief valve, or other equipment. Never terminate above or below any of these within 4 feet horizontally.
Figure
12”
MIN.
BIRD
SCREEN
(TYPICAL)
12” 
MIN.
12” 
MIN.
Figure 4-3A Clearance to Forced Air Inlets
IF LESS
THAN 10’
VENT / AIR | 36" | |
TERMINATION | ||
MIN. | ||
|
FORCED AIR
INLET
7' MIN. ABOVE ANY PUBLIC WALKWAY
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