Vent/air termination – sidewall
23
Installation & Operation Manual
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
GRADE OR
SNOW LINE
Figure 4-1C Alternate PVC/CPVC/SS/ Polypropylene Venting
Arrangement (if Space Allows) w/Field Supplied Fittings
VENT / AIR
TERMINATION
12"
MIN.
12"
MIN.
12"
MIN.
Figure 4-2A Clearance to Gravity Air Inlets
BIRD
SCREEN
(TYPICAL)
12”
MIN.
12”
MIN.
12”
MIN.
Figure 4-2B Alternate Clearance to Gravity Air Inlets w/
Field Supplied Fittings
5. Maintain clearances as shown in FIG.’s 4-1A thru 4-3B,
pages 22 - 24. 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
as shown in FIG. 4-1B. Condensate could freeze and
block vent pipe.
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.
12" (305 MM) MIN
15" (381 MM) MAX
12" (305 MM) MIN
FROM BOILER
VENT PIPE
CONNECTION
TO BOILER
INTAKE AIR
CONNECTION
BIRD SCREEN
GRADE OR
SNOW LINE
Figure 4-1D Alternate SS Venting Arrangement -
Typical Stainless Steel Sidewall Termination of Air and
Vent w/Field Supplied Fittings, Utilizing a Hood Intake
FORCED AIR
INLET
VENT / AIR
TERMINATION
7' MIN. ABOVE ANY
PUBLIC WALKWAY
IF LESS
THAN 10’
36"
MIN.
Figure 4-3A Clearance to Forced Air Inlets
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.
4
Sidewall direct venting
(continued)
