Furnace Vent Height Above Roof

So 28 inches plus 24 inches is a chimney height of only 52 inches.

Furnace vent height above roof.

2 0 feet above the roof surface. 1 0 foot above the roof surface 1 7 12 to 8 12. 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. This reduces the actual required height by 12 inches from our previous calculation of 64 inches.

For oil and wood burning appliances there is a very simple formula that regulates this chimney height requirement it is called 3 foot 2 foot 10 foot rule. Vent caps 12 and smaller may terminate a distance above the roof if 8 feet or more away from a vertical surface as follows. 1 5 feet above the roof surface. Per the 10 and 2 rule once you are at the level of the peak you only need to be 2 feet above it.

2 5 feet above the roof surface. 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. How to vent a furnace in a roof. Roof pitch rise run in inches.

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. All gas furnaces must be vented to allow exhaust gases from the combustion process to escape. If the pipe is farther than 10 feet from the roof. Table of rooftop chimney clearances for metal b vent chimneys flues.