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<DIV>I certainly do NOT think the 2007 PRM requires that the baseline glazing "North" SHGCs be "moved" as the "North" exposures change in each of the simulations that generates the "baseline building performance." I could see how one might think that, but say it ain't so. I assume the baseline "North" SHGC is applied to what would be "North" glazing in the proposed and unrotated baseline models, and those glazing parameters are left in place for that facade as the baseline model is rotated. I don't think this has been fodder for a USGBC CIR or ASHRAE interpretation yet, but maybe I'm out of touch. Addendum A to 2004, which removed the glazing redistribution requirement, still used SHGC_all for all baseline glazing. I thought this had been incorporated verbatim in the 2007 edits but noooooo. Time to get out the magnifier and channel my inner attorney.</DIV>
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<DIV>Fred<BR><BR>>>> "Bill Talbert" <btalbert@aeieng.com> 12/1/2008 8:00 AM >>><BR></DIV>
<DIV>A90.1-2007 removed the reference to SHGC_All and refers to the Chapter 5 tables. You should be able to use the SHGC_north in the baseline if you follow 2007.</DIV>
<DIV>Regards,</DIV>
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<P style="MARGIN-LEFT: 0.5in"><B><SPAN style="FONT-SIZE: 10pt">From:</SPAN></B><SPAN style="FONT-SIZE: 10pt"> <A href="mailto:bldg-sim-bounces@lists.onebuilding.org" target=_blank>bldg-sim-bounces@lists.onebuilding.org</A> [mailto:<A href="mailto:bldg-sim-bounces@lists.onebuilding.org" target=_blank>bldg-sim-bounces@lists.onebuilding.org</A>] <B>On Behalf Of </B>James V. Dirkes II P.E.<BR><B>Sent:</B> Monday, December 01, 2008 8:09 AM<BR><B>To:</B> 'Ulrik Welle-Strand Horn'; <A href="mailto:bldg-sim@lists.onebuilding.org" target=_blank>bldg-sim@lists.onebuilding.org</A><BR><B>Subject:</B> Re: [Bldg-sim] Appendix G - Base Case Orientations and Glazing</SPAN></P></DIV></DIV>
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<P style="MARGIN-LEFT: 0.5in"><SPAN style="FONT-SIZE: 10pt; COLOR: blue">Dear Ulrik,</SPAN></P>
<P style="MARGIN-LEFT: 0.5in"><SPAN style="FONT-SIZE: 10pt; COLOR: blue">Since the intent of the Standard is to assign the better glazing performance to non-North walls, I always rotate the glazing characteristics with the building. (e.g., I assign the "North" glazing characteristics to the elevation that, after rotating, faces North)</SPAN></P>
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<P style="MARGIN-BOTTOM: 12pt; MARGIN-LEFT: 0.5in; MARGIN-RIGHT: 0in"><B><SPAN style="FONT-SIZE: 10pt">From:</SPAN></B><SPAN style="FONT-SIZE: 10pt"> <A href="mailto:bldg-sim-bounces@lists.onebuilding.org" target=_blank>bldg-sim-bounces@lists.onebuilding.org</A> [mailto:<A href="mailto:bldg-sim-bounces@lists.onebuilding.org" target=_blank>bldg-sim-bounces@lists.onebuilding.org</A>] <B>On Behalf Of </B>Ulrik Welle-Strand Horn<BR><B>Sent:</B> Monday, December 01, 2008 7:30 AM<BR><B>To:</B> <A href="mailto:bldg-sim@lists.onebuilding.org" target=_blank>bldg-sim@lists.onebuilding.org</A><BR><B>Subject:</B> [Bldg-sim] Appendix G - Base Case Orientations and Glazing</SPAN></P>
<P style="MARGIN-LEFT: 0.5in">Dear all,<BR><BR>When you are rotating the building through 4 different orientations, do you change the glazing so that the glazing with the highest SHGC is always faces north, or do you put the glazing with high SHGC on the original north facade, and then rotate the building so that the high SHGC glazing faces the east, south and west orientations in subsequent simulations?<BR><BR>Yours faithfully,<BR><BR><BR><B>Ulrik Welle-Strand Horn </B><BR>Sustainability Engineer</P>
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