No you cannot vent your bathroom exhaust fan into the attic.
Venting into attic space.
And many building codes require discharging exhaust to the building s exterior so it s just a good rule of thumb.
In the winter warm moist air seeps into the attic from the living space below.
A ridge vent is a ventilation strip that is placed along the ridgeline of the home.
Venting into attic in cold weather you can also add extra moisture to the attic area that could condense on the underside of the roof and cause moisture and possibly mold.
We ve also seen homeowners have to replace all their roof decking because it became rotted from the excess moisture.
Venting into the attic sends excess moisture to that space which can cause mold and other problems.
You should never exhaust the bathroom fan directly into the attic.
Intake vents located at the lowest part of the roof under the eaves allow cool.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Ideally the range hood should be vented to the outside usually through the roof.
Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent.
That cuts cooling costs and prolongs shingle life.
During winter the primary cause of attic moisture issues stem from warm moist air infiltrating into the attic space from the inhabited areas and condensing on cold surfaces.
So can you vent a bathroom exhaust fan into the attic.
Good ventilation allows the heat and moisture to escape.
The problem with attics.
Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside.
Especially possible if a front comes through changes the pressures and temperatures.
That keeps your attic dry and reduces ice dams.
The following is a list of options for installing ventilation into a residential attic space.
The attic is usually colder than the rest of the house during the winter and that can create a problem for a dryer vent.