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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’ve been modeling in IES and it was brought to my
attention that CIBSE/EN-ISO/ASHRAE have different testing standards for determining
U-values and SHGC (or shading coefficient or g-value).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>IES provides the derived parameters of “CIBSE U-values”
or “EN-ISO U-values” and their respective g-values. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Living in the <st1:country-region w:st="on">US</st1:country-region>
and building in the <st1:place w:st="on"><st1:country-region w:st="on">US</st1:country-region></st1:place>,
I am particularly interested in what those numbers mean to me. Namely, what is
the difference between CIBSE and ASHRAE u-values and shading coefficients? Is
it just that the boundary conditions upon initial testing is different? Are they
exactly the same but with different metrics? How have you accounted for this
difference?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Please, any advice would be much much appreciated.<strong><b><font
color=gray face=Arial><span style='font-family:Arial;color:gray'><o:p></o:p></span></font></b></strong></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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