How To Vent A Furnace Through The Roof

Also known as the type b this vent is operating on the natural air convection.

How to vent a furnace through the roof. Once you determine the size you need to calculate the length of duct needed. The furnace may be vented vertically through the roof. Above the air intake inlet. 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.

With the pipe in a vertical position trace around the pipe using a pencil. To do this you need a duct that is the same size diameter as the vent flange on your heater. 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 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.

If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. One of the most common methods of venting your garage heater is by running the vent through the roof. A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.

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. That depends on whether you have a standard efficiency or a high efficiency furnace. Go into your attic.

A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace. Position the vent pipe up to the bottom of the roof. Should my furnace flue pipe go through the roof or the side of the house. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.

When the vent is withdrawing air from the house it expels the gas outside through the vent. So which type of venting system should your furnace have. The vent outlet must be installed a minimum of 12 in. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl.