Roof Vent Clearances

The vent opening must communicate with outside air over an area no less than the area of the vent pipe measured on the inside.

Roof vent clearances. Table of rooftop chimney clearances for metal b vent chimneys flues. To a height of only 2 in. Exhaust vents must be protected against rain and equipped with back flow prevention features e g flap dampers. The exit point for the quench vent pipe should be located away from operable windows and air inlets.

Manufacturers recommendations usually take precedence over local building codes but you won t know for sure which takes precedence or what those manufacturers recommendations are. Minimum height above the roof surface 1 flat to 7 12. Exhaust vents must not be allowed to be obscured or hidden by vegetation. Vegetation must not be allowed to grow within 3 feet of an exhaust vent.

The quench vent should be a minimum of 5 m above walking surfaces. New york state just raised plumbing vent pipe code from 12 inches to 18 inches above the roof and at least 10 feet horizontal distance from any opening to the building i e. 2 0 feet above the roof surface. The epa and other guidelines somewhat follow the standard codes for plumbing vent pipes which generally are vented above the buildings roof.

The vent when protected from snow closure by the panel design can be cut down from the minimum height of 6 in. In all areas exhaust vents should be at least 1 foot above roof surface. 2 5 feet above the roof surface. 1 0 foot above the roof surface 1 7 12 to 8 12.

Window or fresh air intake.