Dunkirk 90-50 Installation, Operation & Maintenance Manual page 21

figure 9 - roof Vent / intake terminations
• Vent shall not terminate with 6 ft. (1.8m) of a mechanical
air-supply inlet to any building.
• Vent shall not terminate above a regulator within 3 ft. (900
mm) horizontally of the vertical centerline of the regulator
vent outlet to a maximum vertical distance of 15ft (9.5m).
• Vent shall not terminate within 3 ft. (900mm) of a window
or door that can be opened in any building, or any non-
mechanical air-supply inlet to any building, or of the
combustion air inlet of any other appliance.
• Vent shall not terminate underneath a veranda, porch or
deck unless, (a) the veranda, porch or deck is fully open
on a minimum of two sides beneath the floor, and (b) the
distance between the top of the vent termination and the
underside of the veranda, porch or deck is greater than 1 ft.
(300mm).
CombusTion air and VenT pipe
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