Draw a mark on the bathroom ceiling where you d like to install the vent fan.
Vent shower into attic.
It eliminates the need for routing ductwork through the house and these fans usually dry the bathroom more quickly.
Bathroom exhaust fans perform an important function by removing excess moisture from your home.
First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic.
No you cannot vent the bathroom exhaust fan into the soffit vents.
It cannot move air to a crawlspace or attic.
Our article bathroom ventilation codes specs cites the importance of venting bath vent fans to the outdoors not into an attic or crawl space.
This section notes that air exhausted from the bathroom must be sent outdoors not indoors to the same residence or indoors to any other dwelling unit.
Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.
Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood.
Climb into the attic and clear away any insulation from around the hole.
If you re tempted to vent your exhaust fan through an existing roof vent or even vent it into the attic don t do it.
Can you vent a bathroom exhaust fan into the soffit vents.
Bathroom fan vent code requirements include no venting to attic areas to help reduce mold or structural problems.
Bathroom ventilation codes require a bathroom exhaust fan to vent to the exterior not the attic for health and structural reasons.
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.
The question about moist air reentering an attic through soffit vents after it has been blown out of an exhaust vent opening is a fair one but i don t think that s likely to be a significant building moisture source.
So you do need to get that vented outside whether it s through the siding with one of those trap doors that sort of opens out every time you ve got it on or through the soffit.
If you vent the bathroom exhaust fan to close to the soffit vents which are vented plates under your homes outer edge and roof your home the air can be sucked right back into the attic from the soffit.
The lowdown on venting your bath fan into an attic is that it can be done but it should terminate on the outside.
The truth about attic bathroom venting.
This involves running ductwork from the fan usually though an attic and out through the roof.
In fact i have seen numerous houses that haven t yet had signs of mold with the bath fan venting incorrectly.
For optimum performance locate it between the shower and the toilet.
I would by lying if i told you that it will cause problems it may be totally fine.
