Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.
Furnace venting through roof.
It is easier to go through the wall next to the furnace and makes it a lot easier to deal with.
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.
Also known as the type b this vent is operating on the natural air convection.
This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.
With the pipe in a vertical position trace around the pipe using a pencil.
The master flow 4 in.
These collars consist of a metal base generally made out of aluminum and a rubber boot integrated into the top of the collar.
High efficiency furnaces take advantage of the heat in the combustion gases that are wasted in natural ventilation systems.
Piping can be set horizontally to allow venting through a sidewall or vertical installation can also be undertaken to allow venting through the roof.
That depends on whether you have a standard efficiency or a high efficiency furnace.
Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation.
When the vent is withdrawing air from the house it expels the gas outside through the vent.
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 or lower it probably exhausts the gases though the flue pipe on your roof.
The collar s job is to create a tight seal keeping rainwater and debris from getting into your attic.
Also no chimney is needed regardless of whether horizontal or vertical installation is used.
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.
Installation of direct venting is fairly easy but more costly than the b vent type.
This vent is designed to be used on 4 in.
Direct vent systems have versatility to their installation that natural vents do not.
The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof.
Another problem is that flue pipes that go through the roof tend to be less efficient.
Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl.
Go into your attic.
If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.
If you are venting a high efficient furnace with the pvc piping you can go through a roof or wall.
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.
