A door apparatus (10) having a door frame (12) providing a lower central opening (14) extending substantially across a lower central portion (14) of the frame (12), and an upper central opening (17) extending substantially across an upper central portion (16) of the frame (12) above the lower central portion (14). A movable window (18) is included mounted to the frame (12) for movement between a raised position and a lowered position. A guide assembly (21) is included cooperating with the movable window (18) for guidance thereof between the raised position and the lowered position, and a drive mechanism (22) coupled to the guide assembly (21) to selectively drive the movable window (18). The guide assembly (21) and the drive mechanism (22) are both adapted for operation and mounting along a portion of the periphery of the frame lower central portion (14) substantially out of visual obstruction of the lower central opening (13).