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CRAH stands for Computer Room Air Handler, These units are designed for providing cooling in Data Halls/Server Rooms. CRAH units are precision units which control temperature and humidity in a reliable manner. The working principle is same as an ordinary Air Handling Unit in which cooling process is achieved by heat transfer from air to the chilled water flowing inside the tubes of units.
CRAH stands for Computer Room Air Handler. It is a cooling device installed in the Data Center.
A CRAH unit works exactly like a chilled water air handling unit found in almost all high rise commercial office buildings. Cooling is accomplished by blowing air over a cooling coil filled with chilled water. Typically chilled water is supplied to the CRAHs by a chilled water plant (i.e. chiller). CRAHs modulate fan speed to maintain a set static pressure either under floor or in overhead ducts.
