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<p class=MsoNormal>Hello,<o:p></o:p></p>
<p class=MsoNormal>I saw a thread related to this earlier, but I have another
question.<o:p></o:p></p>
<p class=MsoNormal>I’m trying to show ASHRAE 62.1 – 2004 compliance
for a LEED for Schools project that uses UFAD.<o:p></o:p></p>
<p class=MsoNormal>Table 6.2 lists the distribution effectiveness as 1.2 (Ez)
for floor supply of cool air and ceiling return. This describes our system. The
problem is that the same configuration is used for all modes (i.e. heating
also).<o:p></o:p></p>
<p class=MsoNormal>I assume, then, that Ez would have to be revised to 0.7, per
table 6.2. This would effectively penalize UFAD for minimum ventilation
compliance, because the heating mode would require the most outside air, and
therefore be the critical calculation.<o:p></o:p></p>
<p class=MsoNormal>This makes sense (sort of). However, in the LEED reference
guide and other sources, I’ve seen the calculations run with Ez of 1.2
for UFAD, presumably just considering cooling. Our project is cooling
dominated, but not totally without heating.<o:p></o:p></p>
<p class=MsoNormal>Anyway, can anyone help me make sense of this? Does LEED (and
ASHRAE) actually penalize UFAD for EQ prerequisite 1? <o:p></o:p></p>
<p class=MsoNormal>Incidentally, if you try the example in the LEED reference
guide (p. 297), substituting 0.7 for 1.2 for Ez to account for heating,
the provided example would not comply.<o:p></o:p></p>
<p class=MsoNormal>Did I just get the wrong reviewer at the wrong time, or do I
need to get (a bunch) more OSA to my spaces to accommodate the rare heating
modes?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any insight would help. I’m pulling my hair out over
this.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><img width=50 height=70 id="Picture_x0020_1"
src="cid:image002.jpg@01C986E5.C35C2B00" alt="Gaia New 4-29-08"><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Duke Graham, PE, LEED<i>® </i>AP<o:p></o:p></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;color:#76923C'>Gaia
Development LLC<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:10.0pt'>4040 Del Rey Ave., Suite 12<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'>Marina del Rey, CA 90292<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'>p. 310.591.8172<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'>f. 310.827.1702<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'><a
href="../../Local%20Settings/Temporary%20Internet%20Files/Content.Outlook/WUXQZ3ZP/www.gaiadevelopment.com"><span
style='color:blue'>www.gaiadevelopment.com</span></a></span><span
style='font-size:10.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;font-family:Webdings;
color:green'>P </span><span style='font-size:8.5pt;font-family:"Arial","sans-serif";
color:green'>Please consider the trees before printing this email</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
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