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     Salma,    If your building is physically attached to neighboring
      buildings then you'd want to define those adjoining walls as
      BOUNDARY walls. In TRNBuild, you can then specify what the
      boundary condition on the other side of those adjoining walls is.
      Your options are to assume that the temperature on the other side
      of those walls is identical to the temperature in your building,
      or you can assume a constant or a scheduled temperature profile.  kind regards, David 
 On 12/09/2019 12:25, SALMA LAHMAR via
      TRNSYS-users wrote: 
    
 -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 3 North Pinckney Street - suite 202 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  |