Abstract: A door system includes a door body and panel inserts. A first side edge of the door body includes door hinges and a second side edge is provided with one or more slots. The door body includes one or more windows, each communicating with a slot. A channel is provided on the inner aspect of each window. Each of the panel inserts includes a frame defining a central opening. The frame may be received into the slot and rest in snug fitting engagement in the channel, disposing the central opening within the window. A mesh screen is mounted on the frame of one or more panel inserts and occupies the central opening. An air impervious pane is likewise mounted on the frame of other panel inserts. The panel inserts may be interchangeably installed and are retained in place by a slidable bolt mounted on the second side edge.