Hi, i have a problem about surface Outside Boundary Condition when i use energyplus and openstudio .

the question is that: * Severe * BuildingSurface:Detailed="SURFACE 18", invalid Outside Boundary Condition Object=. * ~~~ * ..Outside Boundary Condition="Surface" must be non-blank. * ~~~ * ..This surface will become an adiabatic surface - no doors/windows allowed.

In my case, there are two matched surfaces in two different spaces and two different thermal zones. So which Outside Boudary Condition should we choose, surface(which i chose and caused this error), or Adiabatic etc?

In addition, if the two matched surfaces are in two different spaces but one same thermal zone, which Boundary Condition?

Thanks!