This function calculates the effective opening area.
function EffectiveOpeningArea extends Modelica.Icons.Function; input Modelica.Units.SI.Area AClr(min = 0) "Window clear opening area"; input Modelica.Units.SI.Area AEqv(min = 0) "Window equivalent opening area"; input Modelica.Units.SI.Area AEqv90(min = 0) "Window equivalent opening area by 90° opening"; output Modelica.Units.SI.Area AEff(min = 0) "Effective opening area"; end EffectiveOpeningArea;