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<div class="moz-cite-prefix">Hi Cindy,</div>
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<div class="moz-cite-prefix">invertebrate colleagues used a ductless fume in Munich for sorting mainly formalin specimen that we returned from field work; there we not many pros, mostly cons: depending on the design (how open or closed the hood actually is),
you have (or don't have) a sufficient and direct air flow (the latter being more important for the hood to work efficiently). The other main problem was the weak filter/air flow: because it was a small transportable hood, the filter and thus the surface of
the filter was small as well, which limited capacity of the possible air flow.</div>
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<div class="moz-cite-prefix">I would assume that if you work with materials that are really smelly and oozing, it is worth keeping a keeping a close eye on the air flow and if the fume hood is capable to cover a volume of roughly 1 cubic meter.
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<div class="moz-cite-prefix"><a href="https://www.denios.de/lager-und-prozesstechnik/containment/laminar-air-flow-kabine/">The German manufacturer Denios</a> provides good guidance on air flow etc.<br>
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<p>Hope this is useful<br>
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<p>Dirk<br>
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<div class="moz-cite-prefix">Am 06.08.2024 um 20:01 schrieb Opitz, Cindy E:</div>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Hello! We are planning some lab renovations and are considering a ductless (filter-based) fume hood. A ducted chemical fume hood in this lab would require the addition of an industrial air handler,
which makes the project cost-prohibitive. Our activities include animal maceration and pickling/tanning, so they are more smelly and less chemical in nature. We occasionally use ethanol under the hood, for rehousing or topping off jars in the wet collection.
Our campus EHS staff have suggested a ducted fume hood would not be necessary for these kinds of activities. I’d like to hear from anyone about their recommendations or experiences (good or bad) with ductless, filter-based fume hoods in animal prep labs<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-ligatures:none"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-family:"Arial",sans-serif;color:#151515;mso-ligatures:none">Cindy Opitz </span></b><span style="font-family:"Arial",sans-serif;color:#151515;mso-ligatures:none">(she/her)<br>
Director of Research Collections<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-family:"Arial",sans-serif;color:#151515;mso-ligatures:none">Museum of Natural History and Old Capitol Museum<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-family:"Arial",sans-serif;color:#151515;mso-ligatures:none">Instructor, Museum Studies Certificate Program<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-family:"Arial",sans-serif;color:#151515;mso-ligatures:none">The University of Iowa<br>
11 Macbride Hall, Iowa City, Iowa 52242<br>
Office: 319.335.0481</span><span style="font-size:12.0pt;font-family:"Calibri",sans-serif;color:#201F1E;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-family:"Arial",sans-serif;color:#201F1E;mso-ligatures:none"><a href="mailto:cindy-opitz@uiowa.edu" moz-do-not-send="true" class="moz-txt-link-freetext">cindy-opitz@uiowa.edu</a></span><span style="font-family:"Arial",sans-serif;color:#151515;mso-ligatures:none"><br>
</span><b><span style="font-family:"Arial",sans-serif;color:black;mso-ligatures:none"><a href="https://mnh.uiowa.edu/" target="_blank" moz-do-not-send="true">mnh.uiowa.edu,</a>
<a href="https://oldcap.uiowa.edu/" moz-do-not-send="true">oldcap.uiowa.edu</a> </span>
</b><span style="font-size:12.0pt;font-family:"Calibri",sans-serif;color:#201F1E;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-family:Roboto;color:#201F1E"><img style="width:1.7in;height:.8166in" id="Picture_x0020_2" src="cid:part1.oBkEtnJS.TEFPX97a@leibniz-lib.de" class="" width="163" height="78" border="0"></span><span style="font-size:12.0pt;font-family:"Calibri",sans-serif;color:#201F1E;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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-- <br>
Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels<br>
Postanschrift: Adenauerallee 127, 53113 Bonn, Germany<br>
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Stiftung des öffentlichen Rechts;<br>
Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)<br>
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