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<p class=MsoNormal><span style='color:black'>Vikram, you should follow the
exception (c) if you have a few zones in a larger building that have special
requirements, different from the bulk of the System 7. This I think would
be intended for cold rooms, server rooms, etc.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>For your case with roughly 50%
labs and 50% other, you may instead want to use the exception (a) to add a
second system type in order to account for differences in space requirements between
labs and other spaces.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>The design building is probably a
good guide – if you are accomplishing your proposed design with one
system, then you might find some way to use one system 7. If you have
separate lab/office AHUs in the proposed design, then two systems under
exception (a) may be called for.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>Depending on the size of the lab,
you may end up with several System type 3 or 4 in the baseline, but for larger
labs I think the intention would be to make two System 7’s.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>You may also want to look for the
Labs21 guide to Appendix G which includes some other unrelated suggestions.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'>David<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Tahoma","sans-serif";
color:black'>____________________________________________________________________________________________________________________<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:gray'>David Eldridge, PE<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:gray'>LEED® AP, HBDP<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Tahoma","sans-serif";
color:black'><br>
</span><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:#365F91'>Grumman/Butkus Associates</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif";color:gray'> | </span><span style='font-size:
10.0pt;font-family:"Tahoma","sans-serif";color:#8DB3E2'>820 Davis Street, STE
300 | Evanston, IL 60201 | Ph: (847) 328-3555, ext 224 | Fax: (847) 328-4550</span><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:gray'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:gray'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:gray'>Energy Consultants and Design Engineers</span><span
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</span><span style='font-size:11.0pt;font-family:"Tahoma","sans-serif";
color:black'>____________________________________________________________________________________________________________________<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Vikram Sami<br>
<b>Sent:</b> Wednesday, June 17, 2009 4:23 PM<br>
<b>To:</b> Bldg-Sim<br>
<b>Subject:</b> [Bldg-sim] Appendix G Zoning<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p><b><span style='font-family:"Arial","sans-serif"'>Exceptions to G3.1.1:</span></b><o:p></o:p></p>
<p> <span style='font-family:"Arial","sans-serif"'>(c) If the baseline
HVAC system type is 5, 6, 7, or 8, use separate</span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>single-zone systems
conforming with the requirements</span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>of System 3 or System 4
(depending on building</span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>heat source) for any zones
having special pressurization</span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>relationships,
cross-contamination requirements, or code</span> <span style='font-family:"Arial","sans-serif"'>required</span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>minimum circulation rates.</span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>I’m modeling a building
that has baseline system 7.</span> <span style='font-family:"Arial","sans-serif"'>If
I read this correctly then all lab spaces will</span> <span style='font-family:
"Arial","sans-serif"'>have their own system and that system will conform to</span>
<span style='font-family:"Arial","sans-serif"'>system 3 from table
g3.1.1A. Is that correct? If so</span> <span style='font-family:"Arial","sans-serif"'>–</span>
<span style='font-family:"Arial","sans-serif"'>are all of my lab spaces going
to be packaged single zone units? That doesn’t seem right</span> <span
style='font-family:"Arial","sans-serif"'>–</span> <span style='font-family:
"Arial","sans-serif"'>especially since lab spaces are more than 50% of the
building area in this case. </span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>I’d appreciate
anyone’s help with this.</span><o:p></o:p></p>
<p><o:p> </o:p></p>
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