Kiki, The Type67 data file surface angles for which obstruction heights are provided correspond to absolute azimuths. They are not specified relative to the azimuth of the opening. If you want to turn your building, you need apply the same turn in the Type67 data file. The "turn" equation only turns the building itself, not its surroundings. Kind regards, David kiki siouna wrote: Thank you. -- *********************************************************************** Thermal Energy System Specialists (TESS), LLC David BRADLEY 22 N. Carroll Street - Suite 370 Partner Madison, WI 53703 USA P: +1.608.274.2577 F: +1.608.278.1475 E-mail: bradley@tess-inc.com Web Pages: http://www.tess-inc.com and http://www.trnsys.com *********************************************************************** |