Concealed Door Closers Concealed Door Closers provide a solution for applications where door control must be provided without disturbing the appearance of the door. Lockwood 8014 Concealed Door CloserEN power adjustable 1-4. Lockwood 8015 Concealed Door CloserEN power adjustable 1-5. Lockwood 9800 Series Concealed Overhead Transom Door ClosersEN power 2, 3 and 4 models available.