<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7226.0">
<TITLE>High Performance Glazing</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/rtf format -->
<P><FONT SIZE=2 FACE="Arial">I am modeling high performance glazing with U=0.14, SC=0.35 and comparing to typical 1" thick insulating low-e glass with U=0.33, SC=0.76. Climate is midwest US and 86% of the glass is facing north. The north wall is basically all glass and spandrel. Heating is suppied from district steam supply.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Results show increased steam energy consumption from February through September with high performance glazing and less for remaining winter months. HVAC system is VAV with hot water reheat coils.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Overall annual steam energy consumption reduction is very small. I expected to see significant heating energy savings due to increased perimeter R-value. Has anyone modeled high performance glazing and seen similar results? </FONT></P>
<BR>
<P><FONT SIZE=2 FACE="Arial">Mark Zoeteman</FONT>
<BR><FONT SIZE=2 FACE="Arial">FTC&H, Inc.</FONT>
<BR><FONT SIZE=2 FACE="Arial">(616) 464-3739</FONT>
<BR><U><FONT SIZE=2 FACE="Arial">mrzoeteman@ftch.com</FONT></U>
</P>
<BR>
<PRE>
===========================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE></BODY>
</HTML>