CUBIX’s tool-less hinged and lockable access doors are very convenient, because now the maintenance technician does not need any tools to remove an access door and service the internal components of the fan. With just a quarter turn of the two aluminum heavy-duty locks, he can gain access to the inside of the fan, through an access door that swings as much as 180° downward. Once the job is finished, the technician just needs to swing the door back up, and give the locks a quarter turn to ensure a hermetic seal of the door.