The furnace uses an exhaust vent motor that pushes the exhaust gas through the vent pipe creating a positive static pressure in the vent.
Furnace vent pipe through wall.
When the vent is withdrawing air from the house it expels the gas outside through the vent.
The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.
The outer pipe draws air for combustion from outside and the smaller pipe occupies the inner position and is used to vent the exhaust fumes.
Also known as the type b this vent is operating on the natural air convection.
If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.
Basic instructions on how to run pvc flue venting on high efficiency furnaces.
The condensing furnace produces condensed exhaust gases that contain water and carbon dioxide which together form carbonic acid that results in a corrosive condensate.
Gas appliance direct vent clearances distances from direct gas vent to building features sidewall vent direct vent direct exhaust systems for gas fired heaters water heaters other appliances.
What to know before you install b vent furnace pipe.
So which type of venting system should your furnace have.
This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.
Each of these ameri vent gas pipes features rugged double wall construction with aluminum alloy 1100 3003 or 3105 inner pipe and corrosion resistant galvanized steel outer pipe.
Direct venting uses a power ventilating blower or fan and in some models a heat exchanger plenum to cool outgoing gases passing through the building wall sidewall direct exhaust or roof or through an existing unused chimney through which a vent pipe is passed vertical direct exhaust.
That depends on whether you have a standard efficiency or a high efficiency furnace.
A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace.
What to know before you install b vent furnace pipe.