“Theoretical Formulation for using Outside Cold Air in Removing Stored Heat in Building (Free Cooling)”, J. eng. sustain. dev., vol. 13, no. 1, pp. 209–225, Mar. 2009, Accessed: Jul. 03, 2024. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1582