Furnace Vent Height Above Roof

2 5 feet above the roof surface.

Furnace vent height above roof.

Table of rooftop chimney clearances for metal b vent chimneys flues. Per the 10 and 2 rule once you are at the level of the peak you only need to be 2 feet above it. Roof pitch rise run in inches. All gas furnaces must be vented to allow exhaust gases from the combustion process to escape.

How to vent a furnace in a roof. If the pipe is farther than 10 feet from the roof. 1 5 feet above the roof surface. This reduces the actual required height by 12 inches from our previous calculation of 64 inches.

The top of a chimney pipe must extend at least 2 feet above the peak of the roof if the pipe is within 10 feet of the peak. Vent caps 12 and smaller may terminate a distance above the roof if 8 feet or more away from a vertical surface as follows. Vents must be tall enough so burned gases exit above a roof line and. Minimum height above the roof surface 1 flat to 7 12.

2 0 feet above the roof surface. Please note that this rule doesn t generally apply to pellet and gas vent systems. What it means is that top of the chimney should be 3 feet above the roof surface through which it protrudes and 2 feet above anything within a 10 radius measured horizontally those are minimums. Roof pitch rise run in inchesminimum height flat to 7 12 1 0 foot above the roof surface 7 12 to 8 12 1 5 feet above the roof surface 8 12 to 9 12 2 0 feet above the roof surface.