Gas Furnace Vent Above Roof

Always replace a gas furnace s roof vent with a compatible flue pipe storm collar and termination cap.

Gas furnace vent above roof.

The master flow 6 in. Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation. It provides a vent pipe for exhaust gases but uses unconditioned not cooled or heated air from the space around the furnace for combustion air. 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.

Clearance distances are given for a gas appliance b vent at the rooftop. The different types of venting. If your furnace has an afue rating of 90 percent or above it will have a flue pipe that goes out of the side of your house. Vents can also be terminated above the roof.

For many homes a gas furnace is the preferred heating device it has proven to be an efficient and reliable way of meeting household heating needs over the years. This vent is designed to be used on 6 in. All gas furnaces must be vented to allow exhaust gases from the combustion process to escape. That s because the combustion byproducts are in a liquid form so they need to be drained out of your home in a similar way that the condensation from your air conditioner is drained outside.

Goose neck vent the master flow 6 in. The inner liner carries the furnace s exhaust fumes outside and the outer liner insulates and protects the inner liner. Above the roof surface with a listed cap or listed roof assembly. Metal b vent chimney clearance distances above and on the roof.

Vents must be tall enough so burned gases exit above a roof line and cannot filter back into a house. The single pipe non direct vent system is used where there is no real need for a separate combustion air intake vent. The vent pipe or flue is a vital component of the furnace that transmits emissions from the combustion process out of the building. We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys.

This article series describes b vent metal chimneys used for gas fired appliances. A gas furnace uses a double wall flue pipe for its vent. It s made of zinc coated galvanized steel for durability and reliability.