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.

Furnace vent pipe height above roof.

General rule the chimney should not be outside a window or other house opening. 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. 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. 2 0 feet above the roof surface.

Minimum height above the roof surface 1 flat to 7 12. For the next example you have a shorter chimney height. However i have searched archives on this and another site and have come across various interpretations of the height requirement. 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.

If the pipe is farther than 10 feet from the roof. Put the roof opening directly above the exhaust opening on the furnace. 1 0 foot above the roof surface 1 7 12 to 8 12. 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.

Vent caps 12 and smaller may terminate a distance above the roof if 8 feet or more away from a vertical surface as follows. The photo shows a b vent from a fan assisted furnace flue on a steep sloped hip roof. Chimney chimney flue must terminate min. Roof pitch rise run in inches.

For 18 feet of run you would have a rise of 72 inches. 1 5 feet above the roof surface. These galvanized steel vents were all installed at the same time but only the combustion vent is staining the roof. Table of rooftop chimney clearances for metal b vent chimneys flues.

Number 7 is the furnace exhaust. 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. 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.