Venting High Efficiency Furnace Through Chimney

That depends on whether you have a standard efficiency or a high efficiency furnace.

Venting high efficiency furnace through chimney.

This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. Nor as a chimney liner. High efficiency furnace venting uses two heat exchangers. The efficiency rating of a furnace is called afue annual fuel utilization efficiency.

Conventional furnaces use only one they use a two stage process. Furthermore can a high efficiency furnace vent through a chimney. In the first stage gas is burned to heat the first heat exchanger. For these reasons exhaust from a condensing furnace should never be vented through a standard chimney.

Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys. Click to read further detail. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace.

So which type of venting system should your furnace have. Your furnace won t exhaust gases into your chimney anymore. High efficiency furnace venting thru chimney pvc sch. In fact most mfrs.

In comparing the venting of exhaust gases from a high efficiency furnace boiler or water heater with the venting of exhaust gases from a conventional heating system it will be immediately obvious that the high efficiency equipment exhaust is produced at a low enough temperature that it is vented through comparably small diameter plastic piping. You cannot remove if chimney being used by furnace unless you get a high efficiency furnace. 40 pipe is not approved as a venting material for cat iii or iv by the pipe mfrs. These high efficiency units use pvc pipe to pull air in for combustion and vent the by products to the outdoors.

State not to use their pipe for combustion venting. 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. 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.

2 the structure of the brickwork does it span more than 1 level. 1 is the chimney being used to vent a furnace or does the house have a direct vent furnace vent out an exterior wall. When the vent is withdrawing air from the house it expels the gas outside through the vent.