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<div class="moz-cite-prefix">Dear Lennart,</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">definitely support Paul's cautionary
remarks; we currently have professional humidifiers/dehumidifiers
installed in our collection space. The units are roughly 1 m high
and 60 wide and deep. As massive as the machine is the fan that
propels the air - leading to increased evaporation on surrounding
shelves. Even this professional device needs close monitoring to
prevent spillages in the collection space from the tank that
collects the removed water. Definitely can confirm the cooling
effect Paul mentioned, even though this device is equipped with a
heating element that should keep temperatures constant - while
"[electric] heating" surely is another element on the list of
undesired things you want to avoid in your fluid storage: a huge
potential ignition source in the middle of your alcohol
collection.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">My advice would be to keep the
situation as stable as possible. An interesting anecdote we found
during the research on our upcoming book on best practices for
fluid collections was a collection that had a minor humidity
issues because the floor in the storage space was wiped wet
regularly at least twice a week. Actually it was mildly flooded
twice a week evenly several millimetres high. The Advantage was
that the storage space was basically dust free, the disadvantage
that the concrete flooring saturated with water triggering a mould
outbreak because of high humidity inside the storage space.<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">To mitigate your situation you could
carefully try to wipe the isles in a selected storage room with
little water evenly and monitor closely how the humidity levels
behave. This is the only method to my mind where you can exactly
determine and measure the amount of water you bring actively under
controlled conditions into your storage space (with the hopefully
desired effects on the room climate). But less surely is more
here, and if you have wooden collection furniture in your storage,
you should take great care. </div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Hope this helps</div>
<div class="moz-cite-prefix">Dirk <br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Am 07.12.2020 um 16:45 schrieb
Callomon,Paul:<br>
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<p class="MsoNormal"><span style="mso-fareast-language:JA">Dear
Lennart,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:JA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:JA">Safely
adding humidity to a collection space is hard and always
expensive. The problem if you use a humidifier (such as the
home ones you mention) is that there will be a gradient of
humidity around it – damp enough to create mold near the
machine but still dry at the far end of the room. If you
have multi-outlet ducting for your building climate system,
then, at least try and rig something up that uses that
ducting to distribute the moisture as evenly as possible.
Otherwise, you could set up a system of fans to create air
circulation throughout the space and try to even out the
humidity that way – but be aware that doing that could then
drop the temperature through the evaporative cooling effect,
causing folks to turn up the heating and make the problem
worse.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:JA"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="background:white"><b><span
style="font-size:12.0pt;color:black;mso-fareast-language:JA">Paul
Callomon MSc</span></b><span
style="font-size:10.0pt;color:black;mso-fareast-language:JA"><br>
<i>Collection Manager, Malacology and General Invertebrates</i></span><span
style="color:black;mso-fareast-language:JA"><o:p></o:p></span></p>
<div class="MsoNormal"
style="text-align:center;background:white" align="center">
<span
style="font-size:10.0pt;color:black;mso-fareast-language:JA">
<hr width="100%" size="2" align="center">
</span></div>
<p class="MsoNormal" style="background:white"><b><span
style="font-size:10.0pt;color:black;mso-fareast-language:JA">Academy
of Natural Sciences of Drexel University, Philadelphia</span></b><b><span
style="font-size:10.0pt;color:black;mso-fareast-language:JA"><o:p></o:p></span></b></p>
<p class="MsoNormal" style="background:white"><span
style="font-size:10.0pt;color:black;mso-fareast-language:JA">1900
Benjamin Franklin Parkway, Philadelphia PA 19103-1195, USA<br>
<i><a href="mailto:prc44@drexel.edu" moz-do-not-send="true">prc44@drexel.edu</a>
Tel 215-405-5096 - Fax 215-299-1170</i></span><span
style="font-size:12.0pt;color:black;mso-fareast-language:JA"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:JA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:JA"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="margin-left:.5in"><b><span
style="mso-fareast-language:JA">From:</span></b><span
style="mso-fareast-language:JA"> Nhcoll-l
<a class="moz-txt-link-rfc2396E" href="mailto:nhcoll-l-bounces@mailman.yale.edu"><nhcoll-l-bounces@mailman.yale.edu></a>
<b>On Behalf Of </b>Lennart Lennuk<br>
<b>Sent:</b> Monday, December 7, 2020 10:16 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:nhcoll-l@mailman.yale.edu">nhcoll-l@mailman.yale.edu</a><br>
<b>Subject:</b> [Nhcoll-l] Alternatives for room climate<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<p><b><span
style="font-family:"Arial",sans-serif;font-variant:small-caps">External.<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="margin-left:.5in"><span
style="color:black" lang="ET">Dear curators,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span
style="color:black" lang="ET"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span
style="color:black" lang="ET">We have broken climate
system in our collections room and the main problem is too
low humidity.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span
style="color:black" lang="ET">What would you suggest for
quick alternative for rising the humidity.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span
style="color:black" lang="ET">Are the ordinary humidifiers
(meant for homes or Office) ok to use?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span
style="color:black" lang="ET"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span
style="color:black;mso-fareast-language:ET" lang="ET">Head!<br>
Lennart<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="ET"><o:p> </o:p></span></p>
</div>
</div>
<br>
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<div class="moz-signature">-- <br>
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<p><br>
Dirk Neumann<br>
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Besuchen Sie unsere Sammlung:<br>
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Tel: +49-89-8107-111<br>
Fax: +49-89-8107-300<br>
neumann(a)snsb.de<br>
<br>
postal address:<br>
<br>
Bavarian Natural History Collections<br>
The Bavarian State Collection of Zoology<br>
Dirk Neumann, Section Ichthyology / DNA-Storage<br>
Muenchhausenstr. 21<br>
81247 Munich (Germany)<br>
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Visit our section at:<br>
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