<html dir="ltr"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style id="owaParaStyle" type="text/css">P {margin-top:0;margin-bottom:0;}</style> </head> <body ocsi="0" fpstyle="1"> <div style="direction: ltr; font-family: Tahoma; color: rgb(0, 0, 0); font-size: 13px;"> <div style=""> Hi, <br> very simple question im sure, but im new to ESP-r, <br> modelling an industrial units energy consumption.<br> <br> Is it possible to have a child surface in a zone which is just an open hole,<br> such as a vent hole? i have tried using the "ficticious" material, <br> but it seems to make no difference to the heat lossed from the building.<br> <br> Thanks for any help, <br> <br> Cormac Walsh, <br> University of Aberdeen<br> <br> </div> </div> </body> </html>