Abstract: A door system for providing a door that is easily constructed and has interchangeable panel members. The door system includes a frame assembly comprising a pair of frame portions. Each of the frame portions defines a window aperture of the frame assembly. The frame assembly is designed for being hingably coupled to a door frame of a house whereby the frame assembly is selectively pivoted adjacent a door of the house when the frame assembly is in a closed position. Each of a plurality of panel members is selectively coupled to the frame assembly whereby the panel members are selectively positioned in the window aperture of each of the frame portions. Each of the panel members is designed for controlling environmental communication between an interior of the house and an exterior of the house when the door of the house adjacent the frame assembly is open.