Abstract: The sapce over a shower or tub enclosure, of the type made in one piece of fiber-reinforced plastic, is closed with a dome and a vertical wall extending from the rail, supporting sliding doors, to the ceiling. No finish is required in the end of the bathroom in which the bathing facility is installed and warm and moisture laden air is generally confined to the bathing facility. A bathroom exhaust air housing, connected to a fan and to a conduit to the outside of the building, is installed in the bathing facility above the rail and has grilles in said vertical wall and in the adjacent dome wall. Controls in the housing selectively exhaust air through the grilles directly from the bathroom or from the bathing facility.

Abstract: Two sliding doors are supported to hang vertically, without floor guides for their lower edges, by offsetting the planes of the doors relative to the planes of the supporting tracks in directions so that the lower portions of the doors press towards each other. Intermediate doors, in three or more door assemblies, may be supported to hang vertically. Arms, attached to doors and supporting rollers bearing on the tracks, are interfingered, thereby avoiding general arm interference and maintaining lapping of doors.