Abstract: An airflow apparatus includes an air tunnel, a fan motor, a fan blade, a box housing and a slider lock. The fan blade is driven by the fan motor for moving air moving in the air tunnel. The box housing encloses the fan motor, the fan motor and the fan blade. The slider lock is attached to the box housing. The slider lock has a slider part movable from a first position to a second position. When the box housing is placed upon the bracket in a first installation mode, the slider part is moved from the first position to the second position, a fastener of the slider lock is operated to engage the bracket for fastening the box housing to the bracket.

Abstract: An airflow apparatus includes an air tunnel, a fan motor, a fan blade, a box housing and two expandable side units. The fan blade is driven by the fan motor for moving air moving in the air tunnel. The box housing encloses the fan motor, the fan motor and the fan blade. The box housing has multiple fixing units for fixing to a bracket when the box housing is place upon the bracket for limiting movement of the box housing in a first installation mode. The two expandable side units are attached to a lateral side of the box housing. The expandable side units have extending portions extending respectively from two opposite peripheral edges of the box housing. There is an ear hole for each expandable side unit for inserting a fixing hook placed on an installation wall surface in a second installation mode.