Venting Gas Furnace Through Chimney

You should know how to vent a gas furnace and get rid of the harmful gases for the health and safety of anyone living in your building.

Venting gas furnace through chimney. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. They can t all rise to the top of the chimney so some of them backdraft through the vent pipe itself and enter the home s crawlspace. Also known as the type b this vent is operating on the natural air convection. That depends on whether you have a standard efficiency or a high efficiency furnace.

When the vent is withdrawing air from the house it expels the gas outside through the vent. Furnaces that vent into chimneys can be hazardous but they don t have to be. The vent pipe of your gas furnace plays an important role by carrying all toxic gases created during the combustion within the furnace out of the building. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.

A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace. So which type of venting system should your furnace have. The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber. Direct vent chimneys fireplaces.

When the furnace exhausts into the chimney the gases quickly cool off before exiting to the outdoors.