Davide, TRNBuild refers to all opaque surfaces as "walls" whether they are in fact floors, roofs, ceilings, or doors. I would recommend adding your doors as "resistive only" because they usually have such low mass that their transfer function coefficients cannot be resolved. If your doors have significant amounts of glass area then treat them as windows instead of treating them as doors. Best, David On 1/30/2011 09:19, davide disco wrote: Goodmorning, -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |