18
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3” - 24”
Alternate Horizontal Vent Termination (Dual Pipe)
Figure 18
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3”-24” BETWEEN PIPES
Combustion Air Intake may also be snorkeled
to obtain 12” min ground clearance.
Alternate Vent Termination Above Anticipated Snow
Level
(Dual Pipe)
Figure 19
Vent & Combustion Air Intake Measurements for
Standard Horizontal Terminations (Dual Pipe)
Center to center = 10” min / 24” max.
Vertical separation: 0” - 24”
Vent termination from wall = 8” min / 12” max.
Combustion air intake from wall = 6” max.
Vent and intake clearance to ground or anticipated snow
level = 12” min.
STRAIGHT
ELBOWS
Figure 15
Horizontal Termination (Single Pipe) Above
Highest Anticipated Snow Level
Figure 16
90º OR 45°
ELBOW
12" MIN. TO GRADE OR
HIGHEST ANTICIPATED
SNOW LEVEL
6” MAX
10”- 24”
4” MIN
Standard Horizontal Terminations (Dual Pipe)
Figure 17
