This low profile window fan earned The Best rating from the Hammacher Schlemmer Institute because it produced the highest air velocity and pushed the most air volume. Anemometer readings showed that The Best model produced 522 feet-per-minute air streams from 5' away, far superior to lesser models that could only muster 189 fpm from the same distance. The Best Low Profile Window Fan generated only 58.2 decibels of noise, the volume of a normal conversation. The Best model’s dual fans are reversible and operate independently, allowing one fan to draw cool air inside while the other pushes warm air outside for optimal circulation. At only 13" high, The Best model minimizes view obstruction, its remote control enables easy adjustment of the three fan speeds, and the thermostat can be set to automatically turn the fan on or off at preset ambient temperatures. Fits windows 24" to 37" wide. 24" W x 13" H x 5" D. (8 1/2 lbs.)