Gas Roof Vent Height

Clearances 1 clearance to combustibles in single and multi family dwellings.

Gas roof vent height.

Aluminum 012 inner wall galvanized 018 outer wall. The 2 10 rule states that combustion vents should terminate at least 2 feet above any part of the roof within 10 feet. Vertical blue arrow in our sketch. Gas vents that are over 12 inches 305 mm in size or are located less than 8 feet 2438 mm from a vertical wall or similar obstruction shall terminate not less than 2 feet 610 mm above the highest point where they pass through the roof and not less than 2 feet 610 mm above a portion of a building within 10 feet 3048 mm horizontally.

All other gas vents shall terminate not less than 2 feet 610 mm above the highest point where they pass through the roof and at least 2 feet 610 mm higher than any portion of a building within 10 feet 3048 mm. Round type b gas vent 3 8 and oval 4 6. Manufacturers recommendations usually take precedence over local building codes but you won t know for sure which takes precedence or what those manufacturers recommendations are. 3 16 diameters feature twist lock fittings screws required for 14 and larger diameters.

Clearance in accordance with local installation codes and the requirements of the gas supplier 5 a 3 feet 91cm within a height of 15 feet 4 5m above the meter regulator assembly 5 b 3 feet 91cm above if within 10 feet 3m horizontally. Aluminum 016 inner wall galvanized 021 outer wall. Round type b gas vent 18 3. Notice that we use the words any roof surface or an part of a structure in this explanation.

For a gas vent or type l vent this height must be 2 ft 0 61m or more.