Furnace Venting Through Roof

With the pipe in a vertical position trace around the pipe using a pencil.

Furnace venting through roof. Also no chimney is needed regardless of whether horizontal or vertical installation is used. 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 below 90 percent it will most likely have a flue pipe that goes up through your roof. 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.

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. Goose neck vent 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.

Installation of direct venting is fairly easy but more costly than the b vent type. Position the vent pipe up to the bottom of the roof. When the vent is withdrawing air from the house it expels the gas outside through the vent. Direct vent systems have versatility to their installation that natural vents do not.

Typically vent pipe leaks occur at the collar surrounding the base of the vent pipe where it breaks through the surface of the roofing material. If your furnace has an afue rating of 90 or lower it probably exhausts the gases though the flue pipe on your roof. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. High efficiency furnaces take advantage of the heat in the combustion gases that are wasted in natural ventilation systems.

That depends on whether you have a standard efficiency or a high efficiency furnace. The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof. This vent is designed to be used on 4 in. Also known as the type b this vent is operating on the natural air convection.

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. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl. If you are venting a high efficient furnace with the pvc piping you can go through a roof or wall. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.

The collar s job is to create a tight seal keeping rainwater and debris from getting into your attic. Piping can be set horizontally to allow venting through a sidewall or vertical installation can also be undertaken to allow venting through the roof. Go into your attic.