For a window with an overhang, this model outputs the fraction of the area that is exposed to the sun. The models can also be used for doors with an overhang.

The overhang can be asymmetrical (i.e. wR ≠ wL is allowed) about the vertical centerline of the window. However, the overhang must completely cover the window, i.e., wL ≥ 0 and wR ≥ 0. wL and wR must be measured from the respective corner of the window.

The figure below shows the parameters.


The surface azimuth azi is as defined in Buildings.Types.Azimuth.


The model assumes that


The implementation is explained in Buildings.HeatTransfer.Windows.BaseClasses.Overhang.


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