Wall/stand enclosure with a depth-adjustable 19 mounting level at 25 mm intervals at the front, consisting of a wall section, two base carriers, a roof and floor plate, each with an opening for cable entry, covered with brush strips, two 19 profile rails, two lockable side panels, and a lockable viewing door. The enclosure is assembled tool-free with snap connection elements. The symmetrical basic construction allows for unambiguous assembly. Side panels, roof, and floor frame each feature two fan fields for passive ventilation; an extension for active climate control is possible with separately available fan motors. Unused fan fields can be closed with separately available cover plates. The use as a stand enclosure is possible with separately available leveling feet. An additional rear 19 mounting level is possible with a separately available profile rail set.