It draws air from within the house for combustion.
Furnace vent pipe through roof.
Also known as the induced draft fan this one has a fan that is located on the end of the pipe.
Horizontally through the sidewall or vertically through the roof.
Go into your attic.
This vent features a heavy duty screen which helps protect against small animals from entering your home through the vent.
When compared to the natural vent this one is more flexible although it is also costlier.
The air rises enough to get expelled through your roof.
It s made of zinc coated galvanized steel for durability and reliability.
Match the vent pipe to the.
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.
One common problem with natural ventilation however is the risk of back drafting.
This vent is designed to be used on 6 in.
These systems are very common and if you take a look at the roofs of your neighbors you will see that most of them have a furnace flue ventilation pipe sticking up.
What to know before you install b vent furnace pipe.
Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.
Position the vent pipe up to the bottom of the roof.
The black finish helps this vent blend into your home s rooftop.
Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation.
Put a cover on the vent.
The pipes can be set in two ways.
How to vent a furnace in a roof 1.
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 6 in.
The vents consist of circular or oblong pipe that attaches to a flange on the furnace and extends.
The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof.
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.
The air is then vented outside through a b vent pipe which is set vertically to expel combustion air through the roof.
Type b vents are a standard design that most modern gas furnaces use.
What to know before you install b vent furnace pipe.
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.
Locate the spot to install the vent pipe using a tape measure to determine distance from a wall or other.
Since the exhaust pipe is running on a sidewall the fan works together with the furnace.
Gases produced during combustion are very hot and as such easily rise through the flue.
With the pipe in a vertical position trace around the pipe using a pencil.
