Furnace Vent Pipe Height Above Roof

Minimum height above the roof surface 1 flat to 7 12.

Furnace vent pipe height above roof.

Single wall metal pipe shall extend at least 2 feet 610 mm above the highest point where it passes through a roof of a building and at least 2 feet 610 mm higher than any portion of a. 2 0 feet above the roof surface. If the previous calculation results in the required height of 64 inches we can see that the top of the pipe will not rise above the roof peak but would still meet the requirements of the rule. 2 run the vent pipe up through the roof and install a metal or pvc flashing collar over it.

I know about the 2 feet taller than the roof when a vertical wall is within 8 feet as in illustrated in my code check books. For 18 feet of run you would have a rise of 72 inches. Roof pitch rise run in inches. Table of rooftop chimney clearances for metal b vent chimneys flues.

If the pipe is farther than 10 feet from the roof. The photo shows a b vent from a fan assisted furnace flue on a steep sloped hip roof. Number 7 is the furnace exhaust. 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.

1 5 feet above the roof surface. Chimney chimney flue must terminate min. Any moisture entering this pipe will be drained off before it reaches the furnace by components designed to divert condensation so it doesn t need to be protected. These galvanized steel vents were all installed at the same time but only the combustion vent is staining the roof.

Put the roof opening directly above the exhaust opening on the furnace. Vent caps 12 and smaller may terminate a distance above the roof if 8 feet or more away from a vertical surface as follows. 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. However i have searched archives on this and another site and have come across various interpretations of the height requirement.

5 above the flue collar e g. 2 5 feet above the roof surface. Single wall metal pipe shall terminate at least 5 feet 1524 mm in vertical height above the highest connected equipment draft hood outlet or flue collar. 1 0 foot above the roof surface 1 7 12 to 8 12.