Mixing of hot and cold air streams in the data center lowers availability of IT equipment. Returning the warmest possible air to the computer room air conditioners increases the efficiency and capacity of the system. The hot aisle containment system ensures proper air distribution by completely separating supply and return air paths. The hot aisle is sealed off using doors and transparent ceiling tiles that extend the width of the hot aisle. Ceiling tiles are available for 300mm, 600mm, and 750mm wide NetShelter Racks, UPS/PDU, and InRow Cooling products.