Furnace Vent Pipe Through Roof

Running a vent pipe out of the roof takes some careful preparation.

Furnace vent pipe through roof.

Piping can be set horizontally to allow venting through a sidewall or vertical installation can also be undertaken to allow venting through the roof. Locate the vertical section of furnace vent pipe that passes through the attic. 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. If your furnace has an afue rating of 90 percent or above it will have a flue pipe that.

When water drains air must replace the space that was taken up by the water. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl. The furnace uses an exhaust vent motor that pushes the exhaust gas through the vent pipe creating a positive static pressure in the vent. Plumbing vent pipes are connected to your drain system and are needed for water to drain properly.

The outer pipe draws air for combustion from outside and the smaller pipe occupies the inner position and is used to vent the exhaust fumes. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. The condensing furnace produces condensed exhaust gases that contain water and carbon dioxide which together form carbonic acid that results in a corrosive condensate. Vent pipes provide this air by running outside the structure of the house.

Also known as the type b this vent is operating on the natural air convection. A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace. The master flow 4 in. 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.

If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. Goose neck vent the master flow 4 in. When the vent is withdrawing air from the house it expels the gas outside through the vent. The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.

4 remove the metal straps that secure the upper and lower portions of the vent pipe to the roof and ceiling framing. 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 structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.