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Vent/air termination – sidewall
3 Sidewall direct venting (continued)
VENT / AIR
TERMINATION
12"
MIN.
12"
MIN.
12"
MIN.
Figure 3-2 Clearance to Gravity Air Inlets
FORCED AIR
INLET
VENT / AIR
TERMINATION
7' MIN. ABOVE ANY
PUBLIC WALKWAY
IF LESS
THAN 10’
36"
MIN.
Figure 3-3A Clearance to Forced Air Inlets
5. Maintain clearances as shown in FIG.’s 3-1A thru 3-3B,
pages 18 and 19. Also maintain the following:
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.
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.
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.
ALTERNATE VENTING ARRANGEMENT
(IF SPACE PERMITS)
BIRD
SCREEN
12”
MIN
12” MIN
15” MAX
COUPLING
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
BIRD SCREEN
Figure 3-1C Alternate Venting Arrangement (if Space
Allows) w/Field Supplied Fittings
Figure 3-2B Alternate Clearance to Gravity Air Inlets
w/Field Supplied Fittings
Figure 3-3B Alternate Clearance to Forced Air Inlets
w/Field Supplied Fittings
Installation & Service Manual
TM