Where is the furnace flue pipe located?
The furnace flue will usually be located on the top or the rear of the furnace. It will directly connect to a chimney or to a metal flue pipe that extends vertically to the roof. Most of the remaining pipe will be hidden as it passes through your home, though it may be visible in the attic.
How high should a furnace flue be above the roof?
Table of Type B-Vent Rooftop Clearance Requirements
| Table of Rooftop Chimney Clearances for Metal B-Vent Chimneys & Flues | |
|---|---|
| 7/12 to 8/12 | 1.5 feet above the roof surface |
| 8/12 to 9/12 | 2.0 feet above the roof surface |
| 9/12 to 10/12 | 2.5 feet above the roof surface |
| 10/12 to 11/12 | 3.25 feet above the roof surface |
Can a furnace exhaust be on the roof?
Most furnaces are vented directly through roofs, with either a single pipe or a two-pipe system. A two-pipe system has a small pipe inside a larger one. Exhaust gases flow through the inner pipe while the outer pipe provides fresh air for combustion.
Where do you vent a furnace exhaust?
Sidewall Power Vent At the end of an exhaust pipe, a fan is integrated to help vent the combustion gases from the furnace to the outdoors. Sidewall vent systems are affordable options for gas furnaces, and they also have high-efficiency ratings and safety.
How far above roof does furnace vent need to be?
Gas vents that are over 12 inches (305 mm) in size or are located less than 8 feet (2438 mm) from a vertical wall or similar obstruction, shall terminate not less than 2 feet (610 mm) above the highest point where they pass through the roof and not less than 2 feet (610 mm) above a portion of a building within 10 feet …
Can a high efficiency furnace be vented through the roof?
If your furnace has an AFUE rating below 90 percent, it will most likely have a flue pipe that goes up through your roof. That’s because the combustion byproducts are in a gaseous form, so the gases can float up through the flue pipe and out of your roof.
Can I vent my furnace out the side of my house?
An 80% efficient furnace CAN be side wall vented per National Fuel as Code 7.3. 4 with the use of a “mechanical draft system of either forced or induced draft design”. So what does this mean? You CANNOT just take the vent off an 80% efficient furnace and run it out a side wall.
Can you vent a high efficiency furnace through the roof?
Depending on the installation, a high efficiency furnace will have at least one, and sometimes two, PVC pipes exiting the home. In newly built homes these vents will usually exit thru the roof.
How far above the roof should a gas vent be?
two feet
Gas vents shall extend at least two feet above the highest construction, such as a roof ridge, parapet wall, or penthouse, within ten feet of the vent outlet whether the construction is on the same building as the chimney or on another building.