Previous by Date: Subject: Re: [DCHAS-L] Sars-CoV2 infectivity Date: Friday, June 26, 2020 at 10:54:42 AM Author: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
The references I have are to CO2 in room air. I actually don't know the significance of higher CO2 in exhaled air, but I know I can't climb stairs in an N95 without what is clearly a CO2 problem for me that is relieved by removing the mask. But I'm a doddering old asthmatic. You kids should be skipping around like lambs let out to pasture.
If you want 8 references to data on CO2's effects on people in ASHRAE-vented rooms, let me know off line so we won't overwhelm members.
Monona
-----Original Message-----
From: Stuart, Ralph <Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Fri, Jun 26, 2020 10:54 am
Subject: Re: [DCHAS-L] Sars-CoV2 infectivity
> 900 to 1000 ppm CO2 is also where documented effects on mental acuity can be shown. It's a nice number.
Is there a reference for this? I just had one of our librarians who had been wearing a cloth mask for an hour exhale into a CO2 meter and he hit 3500 ppm. After wearing a cloth mask for 20 minutes, I max out around 1500, so I suspect that the longer wearing periods could become productivty problem.
- Ralph
Ralph Stuart, CIH, CCHO Environmental Safety Manager Keene State College 603 358-2859
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