Figure 6 -Roof Vent / Intake Terminations
8" MINIMUM
VERTICAL SEPARATION
BETWEEN COMBUSTION
AIR INTAKE AND VENT
MAiNTAiN 12" MiNiMUM _-"
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL
USA- 12" (300mm)
Canada - 18" (450mm)
AIR
Figure 7 - Concentric Vent Terminations
1" (26mm)
Maximum
1" (26mm)
Maximum
Roof Overhan(
Combustion
Air
Combustion.
Air
Maintain 12"(300mm)
clearance above highest
anticipated snow level or
grade
man4" (102mm) or greater than
24"(610mm) Horizontal distance between end bells of each
air intake to prevent flue gas recirculation.