I disagree. When its too hot, leaving windows and doors open just allows the super-warm air inside the house. Shut your windows and rely on fans.
I guess it depends on position and other weather conditions like wind then, because if my AC is out, I always do this and it works great. I have the fan on as well though.
But if the door is closed, it's not as cool. I'm not on ground level though, my room is upstairs, so I don't know if that changes anything.
I'm in Dubai, and it gets pretty damn hot here, so I've learned all these tips from personal experience.
