This is a good summary but I would expand the "replaces exhaust air with outside air" bullet to read: replaces exhaust air with return air using a heat exchanger to pre-treat the outside air prior to mixing it with the return air. Maybe this is obvious to everyone but it never hurts to be specific. And speaking of specific, as Larry said, Stanley Mumma is a great resource for information related to DOAS. He may or may not have even coined the term here in the US but I kind of think of him as the father of DOAS. Lastly, and by way of apology, while it may seem to some that we here in the US think we've discovered something new that others didn't already know about, many of us realize that's not true<br>
<br>Carol<br><br><br><div class="gmail_quote">On Sun, Mar 28, 2010 at 12:01 PM, Enrique Chavez-Castro <span dir="ltr"><<a href="mailto:echc@att.net">echc@att.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Sambhav,</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Please see the below summarized
information on DOAS:</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><b><font face="Times New Roman" size="3"><span style="font-size: 12pt; font-weight: bold;">100% OA Units / Make-Up Air Units /
DOAS</span></font></b></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><b><font face="Times New Roman" size="3"><span style="font-size: 12pt; font-weight: bold;">Make Up Air Unit Applications:</span></font></b></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Hospitals</p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Schools</p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Commercial Building/Stores</p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Auditoriums</p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Kitchens</p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Corridors</p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 0.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Make-up air</p>
<p class="MsoNormal" style="margin-left: 1in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Operates <u>continually</u> during
occupied mode</p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 1in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>ASHRAE 62.1 Ventilation Code</p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 1in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Replaces exhaust air with fresh
air</p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 1in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>No mixture with return air</p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 1in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Totally changing load:</p>
<p class="MsoNormal" style="margin-left: 1.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Summer design conditions: High
temperature and high humidity level</p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-left: 1.5in;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><span>•<font face="Times New Roman" size="1"><span style="font: 7pt "Times New Roman";">
</span></font></span></span></font>Winter design conditions: Cold
temperature</p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;">
<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b><span style="font-weight: bold;">On Behalf Of </span></b>sambhav tiwari<br>
<b><span style="font-weight: bold;">Sent:</span></b> Friday, March 26, 2010 9:43
PM<br>
<b><span style="font-weight: bold;">To:</span></b>
<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight: bold;">Subject:</span></b> [Equest-users] DOAS
system</span></font></p>
</div><div><div></div><div class="h5">
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Hi All,<br>
I
would like to know what is DOAS system for what purpose it is used .I have only
heard about it but not used in any of the projects. It wil be so nice if anyone
can tell for what applications it is used.<br>
<br>
Thanks<br>
<font color="#888888"><span style="color: rgb(136, 136, 136);">Sambhav Tiwari.</span></font>
</span></font></p>
</div></div></div>
</div>
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