> People want to be able to shut their door, and this interferes with the cross ventilation. Go back a little further (1850-1900-ish) and everyone had doors t

> People want to be able to shut their door, and this interferes with the cross ventilation. Go back a little further (1850-1900-ish) and everyone had doors that look like http://makingitlovely.com/wp-content/uploads/2013/08/MG_8405-Edit640.jpg http://makingitlovely.com/wp-content/uploads/2013/08/MG_8405... These work great with assisted convection. Open an attic window. Place a box fan in the window, blowing outwards. Everyone opens their windows and the hottest air in their room (at the ceiling) is drawn out through the door vents. It'll even work in single-floor apartments. Since getting a box fan (12 years ago) I've no longer needed AC to sleep at night.