The duct should vent to the outside.
Bathroom exhaust fan attic installation.
Options for venting a bathroom exhaust fan include best to worst.
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.
Cut pieces of a 2 foot x 4 foot board to fit between the joists blocking off the fan from the insulation.
Through the roof or an exterior gable wall.
Be sure to install the duct in the position specified by the instructions so the housing will line up correctly.
The next step in your bathroom fan installation is to attach the fan enclosure to the joist with screws.
Cut or push back the insulation leaving a 6 inch gap between the unit and insulation.
Attach wood pieces with screws.
Exhaust fan installation installing an exhaust fan requires electrical connections and ventilation to the exterior of your home.
Then use a screw to secure the duct connector to the edge of the hole so that it will line up with the exhaust on the fan housing.
Exhaust fans mounted on an exterior wall vent directly outside without any ductwork.