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<DIV><FONT face=Arial size=2>Dear all,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have a look at the types of glass and optical
properties of the double-glazing (6-12-6mm) in ESP-r database and have a few
questions.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The absorptions at the external and internal clear
float glass layers are taken from DCF7671_06nb, which appear to
be:</FONT></DIV>
<DIV><FONT face=Arial size=2>0.157 0.172 0.185 0.201 0.202</FONT></DIV>
<DIV><FONT face=Arial size=2>0.117 0.124 0.127 0.112 0.077</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>1) Why are these values be so different, given the
internal and external have the same thickness (both are 6mm thick)?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>2) What are the type of glass used for double
glazing? In construction database, plate glass has been used for the
double-glazed windows; however, the optical properties are for clear float glass
with vis transmittance of 0.76.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Wong</FONT></DIV></BODY></HTML>