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<div><font color="#1F497D">Dear users,</font></div>
<div><font size="2" color="#1F497D"><span style="font-size:11pt;"> </span></font></div>
<div><font color="#1F497D">I am using TRNSYS version 16 for buildings.</font></div>
<div><font color="#1F497D">I compare the QTSPAS output of TRNBuild for the building when I change the double-glazing window type.</font></div>
<div><font size="2"><span style="font-size:11pt;">“ntype74 QTSPAS total solar radiation passing (trans+abs) the glass surface of external windows of zone”</span></font></div>
<div><font size="2" color="#1F497D"><span style="font-size:11pt;"> </span></font></div>
<div><font color="#1F497D">The 2 window types compared have the same g value (1% difference) and the same area frame/window proportion.</font></div>
<div><font color="#1F497D">They differ strongly by their Ug values</font></div>
<div><font color="#1F497D">I found that the QTPAS values related to the windows are different: ~3% .</font></div>
<div><font color="#1F497D">I wonder why, having the same g values, the solar radiation passing (trans+abs) the glass surface are different.</font></div>
<div><font color="#1F497D">I did not find in manuals the QTSPAS output calculation procedure.</font></div>
<div><font size="2" color="#1F497D"><span style="font-size:11pt;"> </span></font></div>
<div><font color="#1F497D">Can you give me more information?</font></div>
<div><font size="2" color="#1F497D"><span style="font-size:11pt;"> </span></font></div>
<div><font color="#1F497D">Thanks a lot.</font></div>
<div><font color="#1F497D">Patricia Evrard</font></div>
<div><font size="2" color="#1F497D"><span style="font-size:11pt;"> </span></font></div>
<div><font size="2"><span style="font-size:11pt;"> </span></font></div>
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