Furnace Vent Pipe Height Above Roof

Chimney chimney flue must terminate min.

Furnace vent pipe height above roof.

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. Number 7 is the furnace exhaust. Table of rooftop chimney clearances for metal b vent chimneys flues. Put the roof opening directly above the exhaust opening on the furnace.

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. 2 run the vent pipe up through the roof and install a metal or pvc flashing collar over it. These galvanized steel vents were all installed at the same time but only the combustion vent is staining the roof. 2 5 feet above the roof surface.

1 5 feet above the roof surface. 2 0 feet above the roof surface. Water heater installed close to the roof framing would need at least 5 long vertical vent pipe single wall vent pipe requires minimum 6 of clearance to combustible materials. 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.

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. For 18 feet of run you would have a rise of 72 inches. For the next example you have a shorter chimney height. 5 above the flue collar e g.

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. The photo shows a b vent from a fan assisted furnace flue on a steep sloped hip roof. General rule the chimney should not be outside a window or other house opening. However i have searched archives on this and another site and have come across various interpretations of the height requirement.

Vent caps 12 and smaller may terminate a distance above the roof if 8 feet or more away from a vertical surface as follows. Minimum height above the roof surface 1 flat to 7 12. 1 0 foot above the roof surface 1 7 12 to 8 12. 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.