How To Vent A Furnace Through The Roof

A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace.

How to vent a furnace through the roof.

One of the most common methods of venting your garage heater is by running the vent through the roof. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl. With the pipe in a vertical position trace around the pipe using a pencil. Should my furnace flue pipe go through the roof or the side of the house.

What to know before you install b vent furnace pipe. That depends on whether you have a standard efficiency or a high efficiency furnace. When the vent is withdrawing air from the house it expels the gas outside through the vent. What to know before you install b vent furnace pipe.

Also known as the type b this vent is operating on the natural air convection. The vent outlet must be installed a minimum of 12 in. To do this you need a duct that is the same size diameter as the vent flange on your heater. Above the air intake inlet.

A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. 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.

Once you determine the size you need to calculate the length of duct needed. The furnace may be vented vertically through the roof. The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof. Position the vent pipe up to the bottom of the roof.

Go into your attic. 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 outlet inlet of the vent and air intake terminations shall be a minimum of 12 inches above highest anticipated snow level. 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.