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.

Vegetation must not be allowed to grow within 3 feet of an exhaust vent. Exhaust vents must not be allowed to be obscured or hidden by vegetation. 2 5 feet above the roof surface. 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. To a height of only 2 in. The quench vent should be a minimum of 5 m above walking surfaces. Roof pitch rise run in inches.

The vent when protected from snow closure by the panel design can be cut down from the minimum height of 6 in. Table of rooftop chimney clearances for metal b vent chimneys flues. 1 0 foot above the roof surface 1 7 12 to 8 12. The 2 10 rule states that combustion vents should terminate at least 2 feet above any part of the roof within 10 feet.

2 0 feet above the roof surface. Minimum height above the roof surface 1 flat to 7 12. Window or fresh air intake. 1 5 feet above the roof surface.

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.