Gas Roof Vent Height

Vertical blue arrow in our sketch.

Gas roof vent height.

The 2 10 rule states that combustion vents should terminate at least 2 feet above any part of the roof within 10 feet. Aluminum 012 inner wall galvanized 018 outer wall. 3 16 diameters feature twist lock fittings screws required for 14 and larger diameters. Aluminum 020 inner wall galvanized 021 outer wall.

Round type b gas vent 10 16. 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. Aluminum 016 inner wall galvanized 021 outer wall. 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.

Notice that we use the words any roof surface or an part of a structure in this explanation. The top of the flue opening termination of the chimney should be a minimum of 2 feet above any part of a structure within ten feet. Clearances 1 clearance to combustibles in single and multi family dwellings. 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.

Round type b gas vent 18 3.