Furnace Vent Into Attic

Below are three types of venting for gas furnaces.

Furnace vent into attic.

Step by step guide to sealing furnace vent pipe. Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys. So why put an hvac system up in the attic at all. Also known as the type b this vent is operating on the natural air convection.

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 stem of the t has soffit vents and no vent at the top. See comment 3 above. A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace.

An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan. You may have a bad boot around the roof vent that is leaking into the attic. It operates on natural air convection and is also known as the type b vent. Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.

It has started to leak water back through the exhaust fan into the bathroom. The top of the t has soffit vents and a ridge vent. The furnace is located in the stem. Joe downs december 31 2017 at 1 47 pm.

Well mainly it s a way to save space. Or you may have a distance issue. Before you can insulate your attic you need to properly seal the chase for the furnace vent pipe. Recently moved into home in eastern ma zone 5 and have a 2 story 3k sqft home.

A furnace in the attic is a design that works for all homes. Unless your furnace is older than the 1980s you are probably dealing with double walled vent piping. If you are unsure what vent pipe your furnace uses check the manufacturer s specs. When the vent is withdrawing air from the house it expels the gas outside through the vent.

If you don t have a crawl space or a basement then it can be a challenge to place a furnace on the ground floor of the structure. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. It draws air from within the house for. The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.

One of the furnaces is in the attic. If the waste gases come into contact with other combustibles a fire can easily break out. The roof is a t shaped gable roof. I have a bathroom exhaust fan that is vented directly into the attic.

You might not receive the same air movement benefits if the unit is in a garage either.