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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> 		Next by Date:
Subject: Re: [DCHAS-L] Sars-CoV2 infectivity
Date: Fri, 26 Jun 2020 15:39:06 +0000
Author: "Backus, Bruce"

From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Sars-CoV2 infectivity
Date: Fri, 26 Jun 2020 15:21:18 +0000
Reply-To: Monona Rossol <actsnyc**At_Symbol_Here**CS.COM>
Message-ID: 221123158.189855.1593184878133**At_Symbol_Here**mail.yahoo.com
In-Reply-To <31500AAC-1FC7-4E8B-A454-955074FECE79**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

ralph.stuart**At_Symbol_Here**keene.edu

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