Furnace Vent Height Above Roof

2 5 feet above the roof surface.

Furnace vent height above roof. 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 0 foot above the roof surface 1 7 12 to 8 12. 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. 2 0 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. 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. 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. How to vent a furnace in a roof.

If the pipe is farther than 10 feet from the roof. This reduces the actual required height by 12 inches from our previous calculation of 64 inches. Roof pitch rise run in inches. Please note that this rule doesn t generally apply to pellet and gas vent systems.

So 28 inches plus 24 inches is a chimney height of only 52 inches. Minimum height above the roof surface 1 flat to 7 12. 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.