I bought an Air King 20" (same manufacturer of the Lasko) whole house fan a couple of years ago and it proved to be too much fan for my < 2000 sq. ft. condo. I went for this 16" and it does the job just as quietly as the 20". Very easy to install within the window frame and no vibration. I only wish that the side extenders were metal like they are on the Air King. The grill on the front of the fan is metal. I am very happy with this purchase and that's why it gets FIVE STARS. These are both excellent, high quality fans and I would not hesitate to purchase again.