Hot & cold / Data Center aisle containment is a layout design for server racks and other computing equipment in a data center. A containment system can be used to isolate hot aisles and cold aisles from each other and prevent hot and cold air from mixing. It
conserves energy and lowers cooling costs by managing air flow.
Cold aisles face the air conditioner output ducts. Hot aisles face the air conditioner return ducts.