When the vent is withdrawing air from the house it expels the gas outside through the vent.
Gas furnace venting 2 roofs.
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You should know how to vent a gas furnace and get rid of the harmful gases for the health and safety of anyone living in your building.
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That depends on whether you have a standard efficiency or a high efficiency furnace.
The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.
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The vent pipe or flue is a vital component of the furnace that transmits emissions from the combustion process out of the building.
In a cold climate the primary purpose of ventilation is to maintain a cold roof temperature to avoid ice dams created by melting snow and to vent any moisture that moves from the conditioned.
Even furnaces vented through walls are routed through vertical pipes that extend above the roof.
A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace.
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So which type of venting system should your furnace have.
The vent pipe of your gas furnace plays an important role by carrying all toxic gases created during the combustion within the furnace out of the building.
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.
Also known as the type b this vent is operating on the natural air convection.
A gas vent shall terminate in accordance with one of the following.
Gas vents that are 12 inches 305 mm or less in size and located not less than 8 feet 2438 mm from a vertical wall or similar obstruction shall terminate above the roof in accordance with figure 802 6 2 and table 802 6 2.
If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.
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This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.
Most furnaces are vented directly through roofs with either a single pipe or a two pipe system.
