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FIGURE 5-17 -( 3" / 80 mm ONLY) Twin Pipe Side
Wall Vent (Multiple Appliances)
This
Note: 3" shown for clarity. 12" between
vent and combustion air of other boilers
termination
required in all multiple boiler installations.
used on
3"/ 80 mm
vent pipe only
Combustion Air
See Grade,
Snow & Ice
FIGURE 5-18 - (3" / 80 mm ONLY) Twin Pipe Side
Wall with 45° Vent
This termination
used on
3"/ 80 mm vent
pipe only
3" (76 mm) Min.
24" (610 mm) Max.
Separation
Combustion Air, 90°
Elbow Downward
FIGURE 5-19 - (3" / 80 mm ONLY) Twin Pipe Side
Wall Vent
3" (76 mm) Min.
24" (610 mm) Max.
Separation
Opening
Separation 24"
Min.
See Grade,
Snow & Ice
5 - COMBUSTION AIR AND VENT PIPING
12" (305 mm) Min.
Separation
Manufacturer Recommends
Greater Separation
Vent
Vent
45° Elbow
Upward
12" (305 mm) Min.
24" (610 mm) Max.
Separation
Opening
See Grade,
Separation 24"
Snow & Ice
Min.
12"(305 mm)Min.
From Overhang
12" (305 mm) Min.
24" (610 mm) Max.
Separation Between
Bottom Of
Combustion Air Intake
And Bottom Of Vent
Vent
This termination
Combustion Air
used on
3"/ 80 mm vent
pipe only
FIGURE 5-20 - 2" /50 mm & 3" / 80 mm Vent Pipe
with T CAN BE USED ON ALL SIZES
24" (610 mm) Max.
Combustion Air
See Grade,
Snow & Ice
FIGURE 5-21 - 2" / 50 mm & 3" / 80 mm Vent Pipe
with Tee CAN BE USED ON ALL SIZES
Vent
Combustion Air
See Grade,
Snow & Ice
FIGURE 5-22 - 2" / 50 mm & 3" / 80 mm Twin Pipe
Side Wall Vent CAN BE USED ON ALL SIZES
Combustion Air
See Grade,
Snow & Ice
FIGURE 5-23 - 2" / 50 mm & 3" / 80 mm Twin Pipe
Side Wall Vent CAN BE USED ON ALL SIZES
Combustion Air
See Grade,
Snow & Ice
20
3" (77 mm) Min.
Separation
Vent
6" (153 mm) Min.
24" (610 mm) Max.
Separation
6" (153 mm) Min.
24" (610 mm) Max.
Separation
3" (77 mm) Min.
24" (610 mm) Max.
Separation
3" (77 mm) Min.
24" (610 mm) Max.
Separation
Vent
Vent
3" (77 mm) Min.
24" (610 mm) Max.
Separation
240012564 REV A, [05/15/2019]
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