Abstract: A filter screen assembly for use with an air intake unit, the air intake unit having a top, a bottom and at least one side wall. A flexible screen is provided as a roll wound onto a spindle. The spindle is held within a vertically extending container secured to the side of the unit. The container has a bottom and side walls which define an open interior for receiving the spindle and the spindle is rotatably supported at opposite ends within the container. The flexible screen is unwound from the spindle and is attached to the sides of the unit at predetermined locations around the periphery of the unit. The spindle may further be dismounted from the container and the flexible screen manually rewound onto the spindle.

Abstract: A filtering assembly for protecting an air intake of a structure. A flexible screen is mounted so as to cover an air intake opening of the structure. The screen may be selectively moved in either of opposite directions so as to be raised or lowered across the intake opening. The screen may further be stored at either or both ends of the structure.