Natural Gas Vent Roof

A gas vent shall terminate in accordance with one of the following.

Natural gas vent roof.

Ameri vent chimney liner kits are designed to allow you to easily line masonry chimneys. Gas vents that are 12 inches 305 mm or less in size and located not less than 8 feet 2438 mm from a vertical wall or similar obstruction shall terminate above the roof in accordance with figure 503 6 4. Gas vents 12 inches 305 mm in size or smaller with listed caps shall be permitted to be terminated in accordance with figure g2427 6 5 provided that such vents are at least 8 feet 2438 mm from a vertical wall or similar obstruction. Kits in this category include those designed for natural draft appliances using gas oil or wood.

This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. Duravent s type b gas vent system. Gas vents that are 12 inches 305 mm or less in size and located not less than 8 feet 2438 mm from a vertical wall or similar obstruction shall terminate above the roof in accordance with figure 802 6 2 and table 802 6 2. Above the roof surface with a listed cap or listed roof assembly.

As well as those suitable for category i gas fired appliances with b vent or appliances with a draft hood. Materials and construction round type b gas vent 3 8 and oval 4 6. When the vent is withdrawing air from the house it expels the gas outside through the vent. Aluminum 012 inner wall galvanized 018 outer wall.

Also known as the type b this vent is operating on the natural air convection. 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.