When the vent is withdrawing air from the house it expels the gas outside through the vent.
Furnace vent into attic.
A furnace in the attic is a design that works for all homes.
Recently moved into home in eastern ma zone 5 and have a 2 story 3k sqft home.
Also known as the type b this vent is operating on the natural air convection.
Unless your furnace is older than the 1980s you are probably dealing with double walled vent piping.
A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace.
If the waste gases come into contact with other combustibles a fire can easily break out.
Well mainly it s a way to save space.
This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.
The furnace is located in the stem.
You might not receive the same air movement benefits if the unit is in a garage either.
See comment 3 above.
One of the furnaces is in the attic.
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.
The roof is a t shaped gable roof.
There are 3 gas furnaces and ac units.
I have a bathroom exhaust fan that is vented directly into the attic.
Before you can insulate your attic you need to properly seal the chase for the furnace vent pipe.
Joe downs december 31 2017 at 1 47 pm.
The top of the t has soffit vents and a ridge vent.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
You may have a bad boot around the roof vent that is leaking into the attic.
Type b vents are a standard design that most modern gas furnaces use.
Attic hvac systems save space.
The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber.
Or you may have a distance issue.
Below are three types of venting for gas furnaces.
It operates on natural air convection and is also known as the type b vent.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
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.
So why put an hvac system up in the attic at all.
If you are unsure what vent pipe your furnace uses check the manufacturer s specs.
Step by step guide to sealing furnace vent pipe.
It has started to leak water back through the exhaust fan into the bathroom.
