Recessed unit requires rough wall opening 11-3/8"W x 15-11/16"H x 4"D (Semirecessed unit only 2" deep). Top of wall opening 5'-7" above finished floor. For Barrier-Free applications, top of wall opening 4’3" above finished floor. Secure to framing with mounting screws (included) at holes provided. Shim at screw points as required.