Data Center Handbook: Plan, Design, Build, and Operations of a Smart Data Center, Second Edition. Edited by Hwaiyu Geng. 2021 John Wiley & Sons, Inc. Published 2021 by John Wiley & Sons, Inc. 687. air management, metrics (cont’d) supply performance, 649–650, 650, 652, 655 strategies, 7, 44. PUE, 108, 109, 654.