Furnace Vent Height Above Roof

Exhaust vents must be protected against rain and equipped with back flow prevention features e g flap dampers.

Furnace vent height above roof.

Vegetation must not be allowed to grow within 3 feet of an exhaust vent. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl. 5 above the flue collar e g. 1 0 foot above the roof surface 1 7 12 to 8 12.

A gas vent shall terminate in accordance with one of the following. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. Water heater installed close to the roof framing would need at least 5 long vertical vent pipe single wall vent pipe requires minimum 6 of clearance to combustible materials general rule the chimney should not be outside a window or other house opening. 2 5 feet above the roof surface.

In all areas exhaust vents should be at least 1 foot above roof surface. Table of rooftop chimney clearances for metal b vent chimneys flues. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. Gas vents that are 12 inches 305 mm or less in size and located not less than 8 feet 2438 mm from a vertical wall or similar obstruction shall terminate above the roof in accordance with figure 802 6 2 and table 802 6 2 gas vents that are over 12 inches 305 mm in size or are located less than 8 feet 2438 mm from a.

Roof pitch rise run in inches. Exhaust vents must not be allowed to be obscured or hidden by vegetation. Above the roof surface with a listed cap or listed roof assembly. Please note that this rule doesn t generally apply to pellet and gas vent systems.

2 0 feet above the roof surface. 1 5 feet above the roof surface. When the vent is withdrawing air from the house it expels the gas outside through the vent. Also known as the type b this vent is operating on the natural air convection.

Per the 10 and 2 rule once you are at the level of the peak you only need to be 2 feet above it. Minimum height above the roof surface 1 flat to 7 12. This reduces the actual required height by 12 inches from our previous calculation of 64 inches.