The Mini rack features a single slide-out shelf that is capable of mounting up to four Mac minis in a standard 19", 4-post rack enclosure.The design of the airflow ducting with the Mini ensures that all Mac minis are getting fresh, cool air from the front of the rack and that the exhaust is vented directly to the rear. Cool air is directed through four openings below the faceplate to the front and rear Mac minis. The cool air is separated by a base that also does double-duty as holders for the Mac minis. An additional inlet directs cool air above the Mac mins to cool the chassis and force the warmer exhaust air to the rear of the rack.