The master flow 4 in.
Vent furnace through roof.
A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace.
Plumbing vent pipes are connected to your drain system and are needed for water to drain properly.
The vent pipe or flue is a vital component of the furnace that transmits emissions from the combustion process out of the building.
Goose neck vent the master flow 4 in.
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.
Also known as the type b this vent is operating on the natural air convection.
A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace.
The condensing furnace produces condensed exhaust gases that contain water and carbon dioxide which together form carbonic acid that results in a corrosive condensate.
This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.
Running a vent pipe out of the roof takes some careful preparation.
If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.
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.
When water drains air must replace the space that was taken up by the water.
So which type of venting system should your furnace have.
When the vent is withdrawing air from the house it expels the gas outside through the vent.
Vent pipes provide this air by running outside the structure of the house.
For many homes a gas furnace is the preferred heating device it has proven to be an efficient and reliable way of meeting household heating needs over the years.
The furnace uses an exhaust vent motor that pushes the exhaust gas through the vent pipe creating a positive static pressure in the vent.
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.
Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.
This vent is designed to be used on 4 in.
Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation.
The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.
Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl.
