High Efficiency Furnace Venting Through Roof

One pipe brings combustion air directly into the furnace and mixes it with fuel.

High efficiency furnace venting through roof. The other pipe exhausts the combustion gases directly to the outdoors. Due to the condensing nature of a high efficiency furnace its venting must be made of a material that is resistant to corrosion. 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. Should my furnace flue pipe go through the roof or the side of the house.

High efficiency furnaces come with two pipes. In a great majority of cases plastic piping is used to vent high efficiency equipment. However these combustion gases contain residual heat that is lost through the ventilation. 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. Read rest of the answer likewise people ask can a high efficiency furnace vent through a chimney. That depends on whether you have a standard efficiency or a high efficiency furnace. Both of these pipes are directed to the outdoors at about 95 of the furnaces that i inspect in minnesota.

Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl. So which type of venting system should your furnace have. Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys. Venting for high efficiency gas furnaces materials.

You can capture that heat with a high efficiency condensing furnace. A high efficiency condensing furnace can achieve efficiency ratings of 90 or above. It is classified as type bh venting. A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace.

Also known as the type b this vent is operating on the natural air convection. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. In contrast modern high efficiency condensing furnaces exhaust much cooler gasses and need only plastic pipe materials such as pvc cpvc or abs for their exhaust vents some high efficiency furnaces also include a plastic pipe for intake area and all types.

The condition of the chimney is a factor because new super efficient gas furnaces do not vent up the chimney they are vented outdoors horizontally through a wall by a small plastic pipe.