Episode 667: Bradley Prezant, MBA, MSPH, CIH - Assessing Risk of Infection & Air Exchange – CO2 Pitfalls, SF6 Benefits
Posted: Fri Jun 17, 2022 6:35 pm
Show Resources:
Show Discussion:
12:03:37 From cliff zlotnik : trivia- what caused the death of 12,000 Australians in 1919?
12:03:53 From Paula Schenck : flue epidemic
12:04:50 From cliff zlotnik : Close enough Paula, (Spanish Flu) please send your contact info to czlotnik@cs.com
12:11:03 From Derrick A. Denis : We've used propylene glycol smoke with visible detection. We've used peppermint oil with olfactory detection. We've used CO2 emitted from people with meters. We've used CO2 introduced using dry ice with meters. We've never used Sulfur Hexafluoride.
12:13:39 From Host Computer : Just saw that Mike Lubliner from UW retired congrats Mike
12:19:46 From Derrick A. Denis : $65,000
12:30:51 From Paula Schenck : Practically thinking-your "far field modeling" may have the most public health value in suggesting where masks mandates are important or in extreme cases where closing indoor spaces would be reasonable until ventilation improvements are made. The "new normal" likely means we will need these tools for a very long time.
12:32:53 From Host Computer : Good point. There are a few other practical measures coming up in this interview. Particularly with respect to windows for ventilation.
12:35:42 From Host Computer : https://www.researchgate.net/publicatio ... TIMISATION
12:35:49 From Host Computer : https://www.researchgate.net/publicatio ... TIMISATION
12:36:15 From Host Computer : This is a great document. We will also have it on our website after the show
12:36:27 From Host Computer : We will talk more about it after halftime
12:41:15 From Host Computer : I should have asked more about using the flow hood and the pros and cons of that method. I will ask Brad to comment and put it in afterthoughts.iaqradio.com
12:55:20 From Paula Schenck : The problem is that "regulators" and building managers want a number to hang their hat on. I have resisted answering that question but it is difficult when so many just don't understand these nuances.
12:59:14 From Derrick A. Denis : Do you consider design occupancy? Sometimes we get the plans and see that the design occupancy is 25 people, but there are 33 people in the room. We don't need measurements at that point to suggest the system will not ventilate, cool or heat effectively.
13:01:04 From Host Computer : I found this part really interesting. Its obvious once you think about it but sometimes what's obvious to us is not obvious to those designing and maintaining buidings.
13:11:02 From Paula Schenck : Thank you. Very helpful discussion!
13:11:19 From Radio Joe : Thanks Paula
13:13:15 From Derrick A. Denis : GREAT GUEST!
13:13:52 From Brad Harr : Outstanding
12:03:37 From cliff zlotnik : trivia- what caused the death of 12,000 Australians in 1919?
12:03:53 From Paula Schenck : flue epidemic
12:04:50 From cliff zlotnik : Close enough Paula, (Spanish Flu) please send your contact info to czlotnik@cs.com
12:11:03 From Derrick A. Denis : We've used propylene glycol smoke with visible detection. We've used peppermint oil with olfactory detection. We've used CO2 emitted from people with meters. We've used CO2 introduced using dry ice with meters. We've never used Sulfur Hexafluoride.
12:13:39 From Host Computer : Just saw that Mike Lubliner from UW retired congrats Mike
12:19:46 From Derrick A. Denis : $65,000
12:30:51 From Paula Schenck : Practically thinking-your "far field modeling" may have the most public health value in suggesting where masks mandates are important or in extreme cases where closing indoor spaces would be reasonable until ventilation improvements are made. The "new normal" likely means we will need these tools for a very long time.
12:32:53 From Host Computer : Good point. There are a few other practical measures coming up in this interview. Particularly with respect to windows for ventilation.
12:35:42 From Host Computer : https://www.researchgate.net/publicatio ... TIMISATION
12:35:49 From Host Computer : https://www.researchgate.net/publicatio ... TIMISATION
12:36:15 From Host Computer : This is a great document. We will also have it on our website after the show
12:36:27 From Host Computer : We will talk more about it after halftime
12:41:15 From Host Computer : I should have asked more about using the flow hood and the pros and cons of that method. I will ask Brad to comment and put it in afterthoughts.iaqradio.com
12:55:20 From Paula Schenck : The problem is that "regulators" and building managers want a number to hang their hat on. I have resisted answering that question but it is difficult when so many just don't understand these nuances.
12:59:14 From Derrick A. Denis : Do you consider design occupancy? Sometimes we get the plans and see that the design occupancy is 25 people, but there are 33 people in the room. We don't need measurements at that point to suggest the system will not ventilate, cool or heat effectively.
13:01:04 From Host Computer : I found this part really interesting. Its obvious once you think about it but sometimes what's obvious to us is not obvious to those designing and maintaining buidings.
13:11:02 From Paula Schenck : Thank you. Very helpful discussion!
13:11:19 From Radio Joe : Thanks Paula
13:13:15 From Derrick A. Denis : GREAT GUEST!
13:13:52 From Brad Harr : Outstanding