Hi every one Thanks for this site, is very powerfull and I feel very glad for discovered ENERGY-MODELS.COM. My question is very simple cause i can´t use equest correctly if I don´t have the correct extention on the weather file. I tried to install many times "eQ_WthProc" correctly to modifie the extention from .epw to .bin weather file but a error appears. I follow the instructions but nothing happens. Thanks for any advise. Best regards Ignacio Fajardo - Santiago CHILE