Ceiling mounted fans typically use ducts hidden in the walls ceiling or attic to reach a safe exit point on the roof or a wall.
Wall exhaust ventilation fans.
Panasonic whisperthin pick a flow 80 or 100 cfm exhaust fan with led light low profile ceiling or wall and 4 in.
Centrifugal wall exhaust fans.
Exhaust fans mounted on an exterior wall vent directly outside without any ductwork.
While most fans create airflow that is parallel to the motor shaft a centrifugal wall exhaust fan spins the air at right angles to the motor using centrifugal force.
Cabinet mounted wall exhaust fans unlike most of the shutter mounted fans are exhaust fans that are encased within a box type cabinet for deeper or thicker thru wall applications.
Wall mount exhaust fans better suited for dirty dusty and damp environments than standard belt drive fans these have a totally enclosed motor enclosure.
Exhaust fan installation installing an exhaust fan requires electrical connections and ventilation to the exterior of your home.
Because of this misdirection of the air a centrifugal exhaust fan is able to create a nearly unimpeded flow of air.