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This product is a zip file that contains files that consist of PowerPoint slides synchronized with the audio-recording of the speaker, PDF files of the slides, and audio only (mp3 format) as noted.
 
Many codes, standards and guidelines specify ventilation requirements in terms of air changes per hour, but where did they originate and when? How have prescribed ventilation requirements changed through history as research and industry preferences have changed? This thought-provoking journey from Florence Nightingale through clean manufacturing, from sick buildings through healthy spaces, and from air movement to ventilation effectiveness will challenge your preconceived notions and explore future opportunities to improve our indoor environments.
 
1. The History of Health Care Ventilation
Travis English, P.E., Member, Kaiser Permanente, Anaheim, CA
2. The History of Cleanroom Air Change Rates
Phil Naughton, Member, Applied Materials Inc, Austin, TX
3. Ventilation Metrics in Standard 62 over the Years
Andrew Persily, Ph.D., Fellow Life Member, National Institute of Standards and Technology, Gaithersburg, MD
4. The History of Ventilation Terminology
Clifford Cooper, Member, Cooper Associates, Kingston, NY

Citation: ASHRAE Seminar Recordings, 2020 ASHRAE Winter Conference, Orlando, FL