Hot Aisle/Cold Aisle (from ASHRAE, industry)

* A common arrangement for the perforated tiles and the data communications equipment. Supply air is introduced into a region called the cold aisle * On each side of the cold aisle, equipment racks are placed with their intake sides facing the cold aisle. A hot aisle is the region between the backs of two rows of racks * The cooling air delivered is drawn into the intake side of the racks. This air heats up inside the racks and is exhausted from the back of the racks into the hot aisle
Glossary Category