The master flow 4 in.
Furnace vent thru roof.
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.
This vent is designed to be used on 4 in.
A high efficiency furnace uses a different type of venting system because it extracts the heat that remains in those combustion gases before venting the resultant mixture of water and carbon dioxide.
A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the 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.
So which type of venting system should your furnace have.
Should my furnace flue pipe go through the roof or the side of the house.
When water drains air must replace the space that was taken up by the water.
Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation.
It s made of zinc coated galvanized steel for durability and reliability.
Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.
Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys.
This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.
The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.
A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace.
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.
That depends on whether you have a standard efficiency or a high efficiency furnace.
Running a vent pipe out of the roof takes some careful preparation.
In contrast modern high efficiency condensing furnaces exhaust much cooler gasses and need only plastic pipe materials such as pvc cpvc or abs for their exhaust vents some high efficiency furnaces also include a plastic pipe for intake area and all types.
Vent pipes provide this air by running outside the structure of the house.
When the vent is withdrawing air from the house it expels the gas outside through the vent.
Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl.
