[labnetwork] Question about cleanroom mask policies

[Gregory Cibuzar]

Hi Shimon,
Thanks for the insightful study.  A couple of clarification questions that
would help me understand how this data might apply to our cleanroom.
1.  What is the height of your ceiling in the cleanroom?
2.  What is the air velocity leaving the filters?
3.  What is the level of filter coverage?
4.  Air exchange rate (fresh vs. recirculated)
5.  What is the air recirculation path from the bay (raised floor, sidewall
return, etc.)

Thanks.
Regards,
Greg

Greg Cibuzar
Manager, Minnesota Nano Center
www.mnc.umn.edu
University of Minnesota
612-625-8079


On Wed, Dec 16, 2020 at 7:19 AM Shimon Eliav <shimonel at savion.huji.ac.il>
wrote:

> Hi Robert,
>
>
>
> When we returned to work after the first lock-down, we asked ourselves
> what to do regarding masks/face covers.
>
> Then I did a very simple experiment to check by myself how effective is a
> face-cover to contain the particles we generate during normal respiration
> or talking. See attached summary.
>
>
>
> Today our policy is: every user comes with his/her own mask and must put
> the face cover over it. This “two layers” solution is more than enough
> inside the clean room (plus as much distancing is possible).
>
>
>
> Regards,
>
>
>
> Shimon
>
> The Hebrew University of Jerusalem
>
> The Unit for Nano Fabrication
>
> Jerusalem - Israel
>
>
>
> *From:* labnetwork-bounces at mtl.mit.edu [mailto:
> labnetwork-bounces at mtl.mit.edu] *On Behalf Of *Robert Vandusen
> *Sent:* Tuesday, 15 December 2020 19:29
> *To:* labnetwork at mtl.mit.edu
> *Subject:* [labnetwork] Question about cleanroom mask policies
>
>
>
> Hi all.
>
> Hope this finds everyone safe.
>
> Now that N95s are starting to become a bit more accessible, there has been
> some recent discussion within our labs about whether to adopt an N95 mask
> policy for new users and when distancing is a challenge.
>
> So far we have just been wearing the standard cleanroom style masks.
>
> Just wondering what other labs have been using.
>
>
>
> Thanks
>
> Robert Vandusen
> Technical Officer, Microfabrication Lab
> Electronics Department
> Carleton University
> room: 4184 Mackenzie Building
> 613-520-2600 ext 5761
> Robert_vandusen at cunet.carleton.ca
>
>
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