The DC11 Air Cleaner is designed to drop into a suspended ceiling. In order to install the DC11 easily the clearance above the suspended ceiling needs to be at least 13" and it is recommended that the air cleaner be installed in areas that do not exceed a 13' ceiling height. The weight of the system does not rest on the ceiling grids but is secured above the suspended ceiling to a permanent structure such as a joist or beam. All filters on the DC11 are accessible from the louvered door and hinge on the face of the unit. The DC11 covers upto 1100 square feet.