2021 Edition www.amca.org THE ONLY MAGAZINE DEDICATED TO THE AIR MOVEMENT & CONTROL INDUSTRY AMCA COVID-19 Guidance for Large-Diameter Ceiling Fans Introducing Ceiling Fan Energy Index (CFEI) Control Dampers in Ventilation Strategies for Data Centers Design of Parking-Garage Ventilation for Pollutant and Smoke Control Your Questions About Severe-Duty Louvers Answered Inside the AMCA Laboratory and Certifi ed Ratings Program Supplement to ASHRAE Journalhttp://www.amca.org