High Efficiency Furnace Venting Through Roof

The two systems use different venting systems.

High efficiency furnace venting through roof.

If your furnace has an afue rating of 90 percent or above it will have a flue pipe that goes out of the side of your house. A high efficiency condensing furnace can achieve efficiency ratings of 90 or above. What is vented is a residual corrosive condensate of water and carbon dioxide. This residual liquid is highly acidic.

It is easier to go through the wall next to the furnace and makes it a lot easier to deal with. In newly built homes these vents will usually exit thru the roof. 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. That depends on whether you have a standard efficiency or a high efficiency furnace.

If you notice water on the floor around your high efficiency furnace or water or rust stains within the cabinet your furnace is not draining properly. Example of high efficiency furnace venting on a roof 2. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. Depending on the installation a high efficiency furnace will have at least one and sometimes two pvc pipes exiting the home.

If you are venting a high efficient furnace with the pvc piping you can go through a roof or wall. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. It uses a venting system to extract that heat before venting. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl.

Since it takes less energy to move the cooled exhaust horizontally he furnaces typically exhaust to the side of a building rather than the top. 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. As the gases are cooler pvc cpvc or abs piping can be used to carry the exhaust to the outside. Also known as the type b this vent is operating on the natural air convection.