Either way the vent will have to go directly to the outside and installed with a vent hood cover.
Bathroom fan ventilation to attic.
Ventilation fans in the bathroom quickly clear steamy mirrors and create a comfortable environment for starting and ending the day.
The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.
Look for the special fans starting at 160 at heating cooling equipment.
We explain how to install bathroom exhaust fans or vents the vent ducting.
To determine which size fan to buy for your bath multiply the room s square footage by 1 1.
Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot.
The vent hood will have a little flap that opens when air is blowing through the vent but at other times it will remain closed.
Vent your bath and kitchen exhaust fans through the roof through a special roof hood.
Options for venting a bathroom exhaust fan include best to worst.
When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form.
All municipalities have different requirements but some do not draw a hard line on requiring exhaust fans.
How to install a bathroom vent fan.
Bath vent fan installation building codes bath vent fan troubleshooting bath vent fan repair.
Bathroom vent fans are rated by how many cubic feet of air they can move in one minute known as the cfm rating.
If you vent through the roof condensation will drip back into the interior.
The bathroom here is below an accessible attic so tom ran the exhaust duct across the attic and out a gable end.
I recommend that my clients vent their bath fans out a gable wall if at all possible when not using an hrv or erv that is.
Bathroom exhaust fans perform an important function by removing excess moisture from your home.
Because the fan is in the attic you ll hardly hear it.
You should never exhaust the bathroom fan directly into the attic.
This article series explains why bathroom vent fans are needed and describes good bath vent fan choices necessary fan capacity and good bath vent fan and vent duct installation details.
Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside.
The correct way to vent a bathroom fan through an attic is to terminate the vent either to the roof or to the gable wall.
This system is quiet too.
If you vent through a soffit where attic vents are often located the moisture will get sucked back up into the attic or roof venting.
Surprisingly bathroom fans are not required by some building codes.
A single exhaust exits through the roof figure a.
A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan.
Without properly installed ventilation rooms with high humidity can experience paint or wallpaper peeling or costly damage to drywall and wood structures.
