Dunkirk Q95M-200 Modulating Condensing Boiler - Manual (Page 15)

8 - COMBUSTION AIR AND VENT PIPE
Combustion
Air
Vent
1" (26mm)
Maximum
1" (26mm)
Maximum
Roof Overhang
* See Note
Below
Vent
Combustion
Air
36"(915mm) Minimum
Maintain 12"(300mm)
clearance above highest
anticipated snow level or
grade
12" (300mm) Minimum
*Must be less than 4" (102mm) or greater than
24"(610mm) Horizontal distance between end bells of each
air intake to prevent flue gas recirculation.
Figure 6 -Roof Vent / Intake Terminations
Figure 7 - Concentric Vent Terminations
3” MINIMUM
SEPARATION
15