What is the primary operational difference between a Computer Room Air Conditioner (CRAC) and a Computer Room Air Handler (CRAH)?
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A
CRAC uses chilled water coils while CRAH uses direct expansion refrigerant
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B
CRAC uses direct expansion refrigerant while CRAH uses chilled water coils
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C
CRAC is ceiling-mounted while CRAH is floor-mounted
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D
CRAC handles humidification while CRAH only provides cooling