There are really only three venting options.
Vent basement bathroom through wall.
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We ran vent lines under the floor joists photo 6 and framed in a lower ceiling later.
There are ductless vent fans that use a charcoal filter to remove odors but they do not remove excess moisture which is the main purpose of a bathroom vent fan.
When a vent that connects one.
The location of the bathroom will determine how extensive the ductwork will be.
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Thus the discharge of a bath fan through a soffit is sucked back into the attic.
The duct should be run in an inside wall so as not to disturb insulation.
In the last article you suggested that because the party lived in a ranch house they vent downward through the basement and outside through the band joist.
Glue it to the vent line with a long sweep elbow making sure that the pipe maintains the minimum.
No matter the location of the bathroom you can vent the exhaust fan through the wall.
The vent system is a lot simpler than the drain system.
Extend a length of pipe through the hole that extends at least 12 inches from the outside wall.
4 6 out of 5 stars 261.
You may be able to configure a short route.
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After framing the bathroom walls assemble the vent lines.
Because a standard sink drain exits through the wall behind the sink it sits higher than the tub shower and commode drains making it an optimal spot for a vent.
Wall mounted vent fans are available though they re not as common as ceiling mounted models and may be more difficult to install especially if you have a brick veneer house.
Ask your hvac contractor about fabricating a duct run that extends from a fan mounted in a bathroom wall down through the floor and between floor joists out to an exterior wall.
Ductwork is what will connect the fan to the outside.
We live in a ranch style house.