<html><div style='background-color:'><DIV class=RTE>Dear all ,</DIV> <DIV class=RTE> </DIV> <DIV class=RTE>Is it possible to know non-obstructed irradiation values on the exterior of a window surface ?</DIV> <DIV class=RTE> </DIV> <DIV class=RTE>May I assume SW rad from the 'surface energy balance' as the total irradiation impinging that surface?</DIV> <DIV class=RTE> </DIV> <DIV class=RTE>Many thanks </DIV> <DIV class=RTE> </DIV> <DIV class=RTE>Raul</DIV> <DIV class=RTE> </DIV> <DIV class=RTE> </DIV></div><br clear=all><hr>Express yourself instantly with MSN Messenger! <a href="http://g.msn.com/8HMAEN/2734??PS=47575" target="_top">MSN Messenger</a> Download today it's FREE!</html>