When the vent is withdrawing air from the house it expels the gas outside through the vent.
Furnace vent into attic.
Type b vents are a standard design that most modern gas furnaces use.
Attic hvac systems save space.
Before you can insulate your attic you need to properly seal the chase for the furnace vent pipe.
Unless your furnace is older than the 1980s you are probably dealing with double walled vent piping.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
Or you may have a distance issue.
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 roof is a t shaped gable roof.
Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys.
The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.
A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace.
It has started to leak water back through the exhaust fan into the bathroom.
Well mainly it s a way to save space.
I have a bathroom exhaust fan that is vented directly into the attic.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
The stem of the t has soffit vents and no vent at the top.
The furnace is located in the stem.
A furnace in the attic is a design that works for all homes.
So why put an hvac system up in the attic at all.
Step by step guide to sealing furnace vent pipe.
It operates on natural air convection and is also known as the type b vent.
Also known as the type b this vent is operating on the natural air convection.
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.
If you are unsure what vent pipe your furnace uses check the manufacturer s specs.
See comment 3 above.
Joe downs december 31 2017 at 1 47 pm.
One of the furnaces is in the attic.
Recently moved into home in eastern ma zone 5 and have a 2 story 3k sqft home.
Below are three types of venting for gas furnaces.
The top of the t has soffit vents and a ridge vent.
If the waste gases come into contact with other combustibles a fire can easily break out.
You might not receive the same air movement benefits if the unit is in a garage either.
You may have a bad boot around the roof vent that is leaking into the attic.
