I have a Lasko fan that I bought around 1989 which still runs and I live in an apartment on the second floor that gets very hot in the summer so I decided to get another fan to have cross ventilation. I am really pleased with my purchase, this fan is lighter and easier to place in the window and you don't need to screw it in the window for it to stay in. It is much quieter than the older fan even on high speed and doesn't shake in the window like the older model does. I like the fan so much that I plan on purchasing another one next month and give the older model to a friend.