<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif;font-size:small">Hi Shimon,</div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">Thanks for the insightful study. A couple of clarification questions that would help me understand how this data might apply to our cleanroom. <br></div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">1. What is the height of your ceiling in the cleanroom?</div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">2. What is the air velocity leaving the filters?</div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">3. What is the level of filter coverage?</div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">4. Air exchange rate (fresh vs. recirculated)</div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">5. What is the air recirculation path from the bay (raised floor, sidewall return, etc.)</div><div class="gmail_default" style="font-family:georgia,serif;font-size:small"><br></div><div class="gmail_default" style="font-family:georgia,serif;font-size:small">Thanks.<br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><font face="times new roman,serif"><span style="font-family:georgia,serif">Regards,<br>Greg<br><br>Greg Cibuzar</span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">Manager, Minnesota N<font size="2">ano</font> C<font size="2">en</font>ter</span><br><span style="font-family:georgia,serif"><a href="http://www.mnc.umn.edu" target="_blank">www.mnc.umn.edu</a></span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">University of Minnesota</span><br style="font-family:georgia,serif"><span style="font-family:georgia,serif">612-625-8079</span><br></font></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Dec 16, 2020 at 7:19 AM Shimon Eliav <<a href="mailto:shimonel@savion.huji.ac.il">shimonel@savion.huji.ac.il</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><span style="color:rgb(31,73,125)">Hi Robert,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">When we returned to work after the first lock-down, we asked ourselves what to do regarding masks/face covers.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">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.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">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).<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125)">Shimon<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:8pt;color:rgb(31,73,125)">The Hebrew University of Jerusalem<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:8pt;color:rgb(31,73,125)">The Unit for Nano Fabrication<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:8pt;color:rgb(31,73,125)">Jerusalem - Israel<u></u><u></u></span></p>
<p class="MsoNormal"><a name="m_-5102670511638975315__MailEndCompose"><span style="color:rgb(31,73,125)"><u></u> <u></u></span></a></p>
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<p class="MsoNormal"><b>From:</b> <a href="mailto:labnetwork-bounces@mtl.mit.edu" target="_blank">labnetwork-bounces@mtl.mit.edu</a> [mailto:<a href="mailto:labnetwork-bounces@mtl.mit.edu" target="_blank">labnetwork-bounces@mtl.mit.edu</a>]
<b>On Behalf Of </b>Robert Vandusen<br>
<b>Sent:</b> Tuesday, 15 December 2020 19:29<br>
<b>To:</b> <a href="mailto:labnetwork@mtl.mit.edu" target="_blank">labnetwork@mtl.mit.edu</a><br>
<b>Subject:</b> [labnetwork] Question about cleanroom mask policies<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span lang="EN-CA">Hi all.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-CA">Hope this finds everyone safe.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-CA">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.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-CA">So far we have just been wearing the standard cleanroom style masks.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-CA">Just wondering what other labs have been using.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-CA"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-CA">Thanks<u></u><u></u></span></p>
<p class="MsoNormal" style="background:white none repeat scroll 0% 0%"><span style="font-size:10pt;font-family:"Helvetica",sans-serif" lang="EN-CA">Robert Vandusen<br>
Technical Officer, Microfabrication Lab<br>
Electronics Department<br>
Carleton University<br>
room: 4184 Mackenzie Building<br>
<a href="tel:613-520-2600" target="_blank"><span style="color:blue">613-520-2600</span></a> ext 5761<br>
<a href="mailto:Robert_vandusen@cunet.carleton.ca" target="_blank"><span style="color:blue">Robert_vandusen@cunet.carleton.ca</span></a></span><span style="font-size:9pt;font-family:"Helvetica",sans-serif" lang="EN-CA"><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-CA"><u></u> <u></u></span></p>
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