Gas Roof Vent Height

Vent system capacity 5.

Gas roof vent height.

On 2018 10 22 20 15 53 282823 by mod steve thank you for an interesting question. Table of rooftop chimney clearances for metal b vent chimneys flues. For a gas vent or type l vent this height must be 2 ft 0 61m or more. 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.

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. 2 5 feet above the roof surface. Does the vent stack get that hot outside. 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.

The design btuh british thermal units per hour. Roof pitch rise run in inches. 2 0 feet above the roof surface. Notice that we use the words any roof surface or an part of a structure in this explanation.

Heat loss in the vent 3. 1 5 feet above the roof surface. Minimum height above the roof surface 1 flat to 7 12. 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. Do you need high heat resistant paint for the vent pipe from the roof boot to the vent cap including metal cap on on the roof. Flue gas temperature flue gas temperature affects vent operation because the hotter the gases are the lighter they are. 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.

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.