Seminar 52 -- Without Ventilation Effectiveness, Air Change per Hour Is Just a Number

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.

For a long time, air change per hour numbers have been used by designers of different types of buildings, labs, healthcare, cleanrooms, etc. Recent CFD analysis and tests showed that ACR does not guarantee the quality of the interior environments. The effectiveness of the ventilation in the room should be the main concern, but how to evaluate this ventilation effectiveness? The three speakers present their perspective related to the evaluation of the ventilation effectiveness.

1. A Computational Fluid Dynamics Approach for Evaluation of Ventilation Effectiveness< /br> Kishor Khankari, Ph.D., Fellow ASHRAE, , Ann Arbor, MI
2. Risk-Based Methods to Specify and Test Effectiveness of Air Change Rates in Labs and Critical Workspaces< /br> Thomas Smith, Member, Henderson Engineers, Lenexa, KS
3. Cleanroom Ventilation Effectiveness and Recovery Rates per ISO 14644< /br> Phil Naughton, Life Member1 and Yusuf Bhetasiwala, Member2, (1)EcoCleanroom HVAC consulting, Austin, TX, (2)Encon Expertise Pvt. Ltd., Mumbai, India