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<div>John,</div>
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<div>I too will echo everyone else’s comments. In our case we came to what we deemed to be a reasonable compromise with RO water rather than full DI. Something else to consider with the approach your designers have proposed is the risk to your humidification
system should you be in an area of very hard water (as is our case) and should the water softening system fail. The attached photo shows the mineral deposits that were noted on stainless steal steam distribution coils when such a failure occurred in one of
our non-cleanroom systems.</div>
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<div>Good luck</div>
<div>Vito</div>
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<div><font class="Apple-style-span" color="#000000">--</font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri" style="font-size: 14px;"><font face="Calibri,sans-serif">Vito Logiudice MASc, </font>P<font face="Calibri,sans-serif">Eng</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px;">Director of Operations, Quantum NanoFab</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px;">University of Waterloo</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px;">Lazaridis QNC 1207</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px;">200 University Avenue West</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px;">Waterloo, ON Canada N2L 3G1</font></font></font></div>
<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif" style="font-size: 14px;">Tel.: (519) 888-4567 ext. 38703</font></font></font></div>
<div><span style="font-size: 14px;">Email: vito.logiudice@uwaterloo.ca</span></div>
<div><span style="font-size: 14px;"><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri"><font face="Calibri,sans-serif">Website: </font></font></font><a href="https://qncfab.uwaterloo.ca">Quantum NanoFab</a></span></div>
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<span style="font-weight:bold">From: </span>John Nicholson <<a href="mailto:thejohnnicholson@gmail.com">thejohnnicholson@gmail.com</a>><br>
<span style="font-weight:bold">Date: </span>Wednesday, February 4, 2015 at 5:22 PM<br>
<span style="font-weight:bold">To: </span>Labnetwork <<a href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a>><br>
<span style="font-weight:bold">Subject: </span>[labnetwork] Humidification System Design<br>
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<div>Hello all,<br>
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We are currently in a design review process for a new class 1000 clean room on campus and the design architects have come up with a scheme that mixes RO steam with the existing building steam (containing softeners and whatever minerals the local city
water has) to humidify the clean room. I am of the opinion this is a bad idea. Your opinions would be greatly appreciated as well as references to any design standards (ASHRAE?) you may know of for this type of humidification system.<br>
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Regards,<br>
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John<br>
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<div><span style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(247,247,247);display:inline!important;float:none">--<span class=""> </span></span><br style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
<span style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(247,247,247);display:inline!important;float:none">John
Nicholson</span><br style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
<span style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(247,247,247);display:inline!important;float:none">Nanofabrication
Laboratories Manager</span><br style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
<span style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(247,247,247);display:inline!important;float:none">MassNanoTech
Nanofabrication Facility</span><br style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
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of Massachusetts Amherst</span><br style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
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01003-9305</span><br style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
<span style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(247,247,247);display:inline!important;float:none">Phone:
413-545-2772</span><br style="color:rgb(33,33,33);font-family:monospace;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
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413-577-0165</span><br>
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