2024 Edition www.amca.org THE ONLY MAGAZINE DEDICATED TO THE AIR MOVEMENT & CONTROL INDUSTRY Maintaining Optimal Data-Center Environments with Dampers and Louvers Mark of Distinction The Human Cost of Heat Stress and the Role of Large-Diameter Ceiling Fans in Mitigating Risk Direct-Drive vs. Gear-Driven: Choosing the Correct Motor for a Large-Diameter Ceiling Fan Manufacturers of Industrial-Process Equipment, Beware: Soonto-Be-Finalized Regulation Poses Signifi cant Burdens Why a product certifi ed to bear an AMCA seal deserves to be specifi ed ahead of products that are not Supplement to ASHRAE Journalhttp://www.amca.org