The different types of venting.
Furnace flue height above roof.
The top of the flue opening should be 3 ft 0 92 m above any roof surface.
Most wood stove and factory built fireplace manufacturers and local building codes will require that the chimney must extend at least 2 feet above any portion of any structure within 10 feet measured horizontally and must extend at least 3 feet above the highest point of its roof penetration.
Height of furnace vent above grade this is an exhaust vent for a high efficiency furnace.
When we are talking about gas furnace vent pipe code we need to talk about the different types of the vents first after all you want to keep your family safe from harm.
Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl.
The top of the chimney should be at least two feet above anything within a ten foot radius of the chimney.
See the detailed b vent chimney rooftop clearance table below.
If the pipe is farther than 10 feet from the roof peak it must be 2.
Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.
Chimney chimney flue must terminate min.
A type b w gas vent shall terminate not less than 12 feet in.
Nfpa54 12 7 2 2 802 6 2 2 type b w vents.
As a rule of thumb is there a min height requirement above grade in areas with heavy snow fall.
11 12 to 12 12 4 0 feet above the roof surface continues to 21 12 pitch at 8 0 feet vent caps larger than 12 must be located at least 2 feet above the highest point and 2 feet higher than any portion of the building within a horizontal distance of 10 feet.
Below are some requirements for the furnace water heater single wall vent pipe chimney warm climate.
2 above the roof.
A vertical line drawn along the up roof side of the chimney from the roof surface to the top of the chimney flue opening shall be at least 3 ft in height.
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.
Except for flat and very low slope roofs such as those listed in the table below b vents should be at least two feet above the roof surface as well.
2 higher than building withing 10.
Feet 1524 mm in vertical height above the highest connected appliance draft hood or flue collar.
Chimney chimney flue must terminate min.
For a gas vent or type l vent this height must be 2 ft 0 61m or more.
