High Efficiency Furnace Venting Through Roof

It is easier to go through the wall next to the furnace and makes it a lot easier to deal with.

High efficiency furnace venting through roof.

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. Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl. As the gases are cooler pvc cpvc or abs piping can be used to carry the exhaust to the outside. A high efficiency condensing furnace can achieve efficiency ratings of 90 or above.

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. It uses a venting system to extract that heat before venting. Depending on the installation a high efficiency furnace will have at least one and sometimes two pvc pipes exiting the home. What is vented is a residual corrosive condensate of water and carbon dioxide.

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. It s a high efficiency gas furnace and that s the exhaust vent. The two systems use different venting systems. 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. Also known as the type b this vent is operating on the natural air convection. Example of high efficiency furnace venting on a roof 2. In newly built homes these vents will usually exit thru the roof.

That depends on whether you have a standard efficiency or a high efficiency furnace. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. This residual liquid is highly acidic.