Venting Gas Furnace Through Roof

The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.

Venting gas furnace through roof. A furnace that uses natural gas to heat your home produces byproducts as part of this process. A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace. When the vent is withdrawing air from the house it expels the gas outside through the vent. That depends on whether you have a standard efficiency or a high efficiency furnace.

This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. These byproducts in the form of combustion gases must be removed from your home via a venting system. Push the male end of a new vent pipe up through the bottom of the roof flashing and set its female end on the male end of the vent pipe that connects to the gas furnace. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.

So which type of venting system should your furnace have. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl. Twist the roof s vent pipe clockwise one half turn with one hand while holding the gas furnace s vent pipe still with the other hand. Also known as the type b this vent is operating on the natural air convection.