<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>Ben - dumb question.</DIV>
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<DIV>How is internal load figuring into this equation? And solar gain from the sun?</DIV>
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<DIV>I NEVER get an exact U x A x dT savings, as eQuest takes ALL factors into consideration.</DIV>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Ben Pressman <bpressman@practicalenergy.net><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> equest-users@lists.onebuilding.org<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Wed, August 25, 2010 1:32:04 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Equest-users] BEPU space heating calculation<BR></FONT><BR>I have a Window Glass EEM run that upgrades the windows in a 1970s school building from single-paned to double-paned, tinted, and argon-filled; a decrease in U-factor from 1.04 to 0.35. The LV-D report shows a decrease in building U-factor from 0.176 to 0.142 which, based on an HDD calculation:<BR><BR>(0.176-0.142)*24hrs*(estimated HDD for my area)*A/eff = 1217 therms<BR><BR>of savings, or 24.7% of the overall energy usage of my baseline model. The BEPU report, however, shows almost no energy savings. How can this be? Is there some way to see what schedule, or
number of degree days the calculation in the BEPU is using? Has anyone had this sort of problem?<BR><BR>Thanks,<BR>Ben<BR><BR>-- Ben Pressman<BR>Project Engineer<BR>Practical Energy Solutions<BR>770 E. Market Street, Suite 250<BR>West Chester, PA 19382<BR>ph 610.430.1382<BR>cell 610.733.9518<BR>web <A href="http://www.practicalenergy.net/" target=_blank>www.practicalenergy.net</A><BR><BR><BR>_______________________________________________<BR>Equest-users mailing list<BR>http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org<BR>To unsubscribe from this mailing list send a blank message to <A href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" ymailto="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</A><BR></DIV></DIV></div><br>
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