Gas Furnace Roof Vent

Most old gas furnaces use the direct mechanism.

Gas furnace roof vent.

When the vent is withdrawing air from the house it expels the gas outside through the vent. A gas furnace uses a double wall flue pipe for its vent. The first is the direct vent which directly throws all the air into the atmosphere. Goose neck vent roof cap in black the master flow 4 in.

Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation. Always replace a gas furnace s roof vent with a compatible flue pipe storm collar and termination cap. Video of the day. Vents must be tall enough so burned gases exit above a roof line and cannot filter back into a house.

Metal b vent chimney clearance distances above and on the roof. When venting your gas furnace you need to know the different kinds of vents that can be installed. Type b vents are a standard design that most modern gas furnaces use. We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys.

The air is then vented outside through a b vent pipe which is set vertically to expel combustion air through the roof. Modern furnaces use type b pipes which are more environmentally safe. This vent is designed to be used on 4 in. The inner liner carries the furnace s exhaust fumes outside and the outer liner insulates and protects the inner liner.

Goose neck vent roof cap in black the master flow 6 in. Goose neck vent in the master flow 4 in. Also known as the type b this vent is operating on the natural air convection. Goose neck vent in the master flow 6 in.

It s made of zinc coated galvanized steel for durability and reliability. This vent is designed to be used on 6 in. Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation. It s made of zinc coated galvanized steel for durability and reliability.

All gas furnaces must be vented to allow exhaust gases from the combustion process to escape. It draws air from within the house for combustion. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. That s because the combustion byproducts are in a gaseous form so the gases can float up through the flue pipe and out of your roof.

This article series describes b vent metal chimneys used for gas fired appliances.