Window Shade Coefficient
Window Shade Coefficient
(OP)
I'm running a cooling load on a south exposed office area w/ all glass (1" tinted, low e w/ thermal break) walls. There is a 14' outside overhang. I'm using a current default shade coefficient of 0.811 in HAP. I believe I need to tweak this coefficient to reduce the grossly oversized load. Does anyone know the proper way to determine an accurate shading coefficient?
thanks
Nick





RE: Window Shade Coefficient
RE: Window Shade Coefficient
To model your window in HAP, click on the "detail" box which will allow you to build your window. If you know the window properties from the manufacturer then you can input the window properties directly into the shade coefficient. Most manufacturers give the SHGC (Solar Heat Gain Coefficient) which can be used to calculate the Shading Coefficient. I can't find the formula at the moment.