21
240012994 Rev. B [08/31/2020]
FIGURE 5-17 -Twin Pipe Side Wall Vent (Multiple
Appliances)
Vent
12" (305 mm) Min.
Separation
Manufacturer Recommends
Greater Separation
Combustion Air
See Grade,
Snow & Ice
5 - COMBUSTION AIR AND VENT PIPING
FIGURE 5-19 - (3" / 80 mm ONLY) Twin Pipe Side
Wall Vent
Vent
3" (80 mm) Min.
24" (610 mm) Max.
Separation
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
Combustion Air
Opening
Separation 24"
Min.
See Grade,
Snow & Ice
FIGURE 5-18 - (3" / 80 mm ONLY) Twin Pipe Side
Wall with 45° Vent
Vent
45° Elbow
Upward
3" (80 mm) Min.
24" (610 mm) Max.
Separation
Combustion Air, 90°
Elbow Downward
12" (305 mm) Min.
24" (610 mm) Max.
Separation
Opening
Separation 24"
Min.
See Grade,
Snow & Ice
Note: 3" shown for clarity. 12" between
vent and combustion air of other boilers
required in all multiple boiler installations.
FIGURE 5-22 - (2"/ 60 mm ONLY) Twin Pipe Side
Wall Vent CAN BE USED ON ALL SIZES
3" (80 mm) Min.
24" (610 mm) Max.
Separation
See Grade,
Snow & Ice
Combustion Air
Vent
FIGURE 5-20 - (2"/ 60 mm ONLY) Vent Pipe with T
CAN BE USED ON ALL SIZES
See Grade,
Snow & Ice
Combustion Air
Vent
3" (80 mm) Min.
24" (610 mm) Max.
Separation
6" (153 mm) Min.
24" (610 mm) Max.
Separation
FIGURE 5-21 - (2"/ 60 mm ONLY) Vent Pipe with T
CAN BE USED ON ALL SIZES
See Grade,
Snow & Ice
FIGURE 5-23 - (2"/ 60 mm ONLY) Twin Pipe Side
Wall Vent CAN BE USED ON ALL SIZES
Combustion Air
Vent
3" (80 mm) Min.
24" (610 mm) Max.
Separation
See Grade,
Snow & Ice
Vent
Combustion Air
6" (153 mm) Min.
24" (610 mm) Max.
Separation
3" (80 mm) Min.
24" (610 mm) Max.
Separation
This Termination
can be used on:
2" / 60 mm ON
205
3" / 80 mm
ON ALL SIZES
vent only
This Termination
can be used on:
2" / 60 mm ON
205
3" / 80 mm
ON ALL SIZES
vent only
This Termination
can be used on:
2" / 60 mm ON
205
3" / 80 mm
ON ALL SIZES
vent only
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