Hi Young-Sub, I tried to find the menu as indicated in the the attachments you sent. I could not find any menu where you can plug in different emissivity for inside and outside surface. What version of ESP-r is this? All: Is there a different menu for different install option of ESP-r? I am using the latest version of ESP-r but I could not find the menu as in Young-Sub's attachment. So far if I need to have different emissivity, I did what Achim suggested below, ie change it directly to the .con file. The only disadvantage of  this work around is that everytime you update the construction file through the menu (in the zone menu, update all construction), this file got updated, ie the emissivity will be taken from the database, which has the same value for inside and outside surface. Then you have to re-input the different emissivity value in the .con file. Ery <div>On 12/11/06, Geissler Achim <<a href="mailto:Achim.Geissler@josef-gartner.ch">Achim.Geissler@josef-gartner.ch</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div link="blue" vlink="blue" lang="EN-US"> <div> Hi Young-Sub An,   I do not quite understand what you are doing, however, here are some thoughts:     - if you are not modeling the double glass as a zone, the low-e in the glass cavity has no influence. The U-value of the glass is approximated by adapting the thermal resistance of the glazing gap air.   - the external emissivity of the double glass (pos. 1 and 4) actually used in the simulation can be checked in the construction file (.con):   # for each surface: inside face emissivity  0.22000,0.99000,0.22000,0.99000,0.90000,0.90000,0.22000 # for each surface: outside face emissivity  0.22000,0.83700,0.22000,0.99000,0.90000,0.90000,0.22000   (where "surface" actually should read "construction").   My experience is that if the correct value is set here, there are feasible differences in the calculation results.   Regards, Achim     <div>     </div> <div style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color blue; border-width: medium medium medium 1.5pt; padding: 0cm 0cm 0cm 4pt;"> <div> <div style="text-align: center;" align="center"> <hr align="center" size="2" width="100%"> </div> From: <a href="mailto:esp-r-bounces@lists.strath.ac.uk" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">esp-r-bounces@lists.strath.ac.uk</a> [mailto:<a href="mailto:esp-r-bounces@lists.strath.ac.uk" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> esp-r-bounces@lists.strath.ac.uk</a>] On Behalf Of ???? Sent: Sunday, December 10, 2006 12:12 PM To: <a href="mailto:esp-r@lists.strath.ac.uk" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">esp-r@lists.strath.ac.uk</a> Subject: [esp-r] The position of low-e coating in double glass. </div><div>   <div align="center"> <table style="width: 100%;" border="0" cellpadding="0" cellspacing="0" width="100%"> <tbody><tr> <td style="padding: 8pt;" valign="top"> <div> Dear esp-r user   I analyzed surface temperature according to position of low-e coating in double glass. But, I find out the result that can't understand. The result of surface temperature is the very same case1 and case4, case2 and case3. guess that ESP-r program appear numberЁз value of emissivity int and numberЁк value of emissivity ext  regardless of glass. Please, solve the problem. Thank you.   Sincerely Young-Sub An --------------------------------------------------------------------------------------- Case 1. -> Low-e coating is applied to number Ёк of glass surface. Case 2. -> Low-e coating is applied to number Ёй of glass surface.         To apply on numberЁй of glass surface changes the emissivity value. Case 3. -> Low-e coating is applied to number Ёз of glass surface.         To apply on numberЁз of glass surface inverts glass(dlow24) of case 1. Case 4. -> Low-e coating is applied to number Ёи of glass surface.         To apply on numberЁи of glass surface changes the emissivity value.    <img align="bottom" border="0" height="32" width="32"> <img align="bottom" border="0" height="32" width="32"> </div> </td> </tr> </tbody></table> </div> (*^^*) ---------------------------------ooO--U--Ooo----- ѕИ їµ ј· 305-719 ґлАь АЇјє±ё ґцёнµї »к 16-1№шБц ±№ёіЗС№зґлЗР±і °ЗГа°шЗР°ъ 1µї 313ИЈ °ЗГаИЇ°ж/°иИ№/јієсї¬±ёЅЗ Tel : 042 821-1636 Mobil : 010-3002-0184 E-mail : <a href="mailto:rnsqks8646@hanmail.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">rnsqks8646@hanmail.net</a> Homepage : <a href="http://hyunam.hanbat.ac.kr/%7Ejhyoon" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://hyunam.hanbat.ac.kr/~jhyoon</a> -----------------------------------ooO-Ooo------- <div style="margin-top: 15pt;"> <div> "їмё® АОЕНіЭ, Daum" <a href="http://www.daum.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> http://www.daum.net</a> ЎєЖт»эѕІґВ №«·б ЗСёЮАПіЭЎ» </div> <div style="border: 1pt solid rgb(223, 223, 223); padding: 0cm; margin-right: 9pt; margin-bottom: 7.5pt; float: left;"> <a href="http://allim.daum.net/servlet/Redirect?sid=footer060925_daumdirect" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> <img border="0" height="48" width="350"></a> </div> <div style="border: 1pt solid rgb(223, 223, 223); padding: 0cm; float: left;"> <a href="http://allim.daum.net/servlet/Redirect?sid=footer_lucky1204" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> <img border="0" height="48" width="350"></a> </div> </div> <img border="0" height="32" width="32"> </div></div> </div> </div> _______________________________________________ esp-r mailing list <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:esp-r@lists.strath.ac.uk">esp-r@lists.strath.ac.uk</a> <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://lists.strath.ac.uk/mailman/listinfo/esp-r" target="_blank"> http://lists.strath.ac.uk/mailman/listinfo/esp-r</a> </blockquote></div>