How do I model a glass door or a wooden door with a small glass window?

Glass doors are modeled as windows (e.g. sliding glass doors are considered operable windows) 3′ × 7′ wood door with a 2′ × 3′ window is modeled as a 3′ × 5′ wood door and a separate 2′ × 3′ window. Remember, TREAT’s calculation engine is concerned with R value × surface area.  more

Glass doors are modeled as windows (e. g. sliding glass doors are considered operable windows) 3'x 7' wood door with a 2'x3' window is modeled as a 3'x5' wood door and a separate 2'x3' window. Remember, TREAT's calculation engine is concerned with R value * surface area.  more