Furnace Vent Height Above Roof

1 0 foot above the roof surface 1 7 12 to 8 12.

Furnace vent height above roof.

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. 1 5 feet above the roof surface. 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.

If the pipe is farther than 10 feet from the roof. 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. Vent caps 12 and smaller may terminate a distance above the roof if 8 feet or more away from a vertical surface as follows. 2 0 feet above the roof surface.

So 28 inches plus 24 inches is a chimney height of only 52 inches. How to vent a furnace in a roof. Table of rooftop chimney clearances for metal b vent chimneys flues. 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.

Vents must be tall enough so burned gases exit above a roof line and. 2 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. Roof pitch rise run in inches.