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[EnergyPlus_Support] Re: define a basebuilding window

EnergyPlus calculates the U-values for the window assembly based on (amongst other parameters) the U-values of the individual materials, using a standard method which takes into consideration things like inside and outside environmental conditions like temperature and surface confection. The results will differ from the surface to surface U-values of the individual materials. Also, this eplus calculation will never reach 6.92 (which is completely unrealistic in anycase), trust me I've tried. I think it maxed out at 6.5. However, for code conformance the oppertunity exists to enter the SHGC and U-values (results) directly (check the input output documentation).



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Angel" <angel_p_f@...> wrote:
> Hi all, 
> Does anyone know why i define a window material:window:simpleglacingsystem whith U = 6,92 W/m2-K, i also define a frame whith the same U factor.
> and in the output (envelope summary) apears U = 5,835 W/m2-K for the window.
> 6,92 W/m2-K is the U i have to define for my ASHRAE 90.1 basebuilding
> Thank in advance.


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