Holmes HAWF2043 Twin Window Fan  Product Reviews

"I ordered two of these and they work very well. They fit in the window perfectly, and the cord is long enough to reach the outlet. You don't have to turn the fan off to go from blowing in to blowing out, which is a plus. The thermostat is a mixed blessing. It actually works, which means that while you are trying to sleep, you can hear the fan cycling. So instead of a constant hum, it's up and down and fast and slow. I recommend using the thermostat when the noise doesn't matter, but just leaving it ON when you're trying to sleep."

"I purchased this fan a few years back. It is quiet enough to sleep with it on on hot nights. The exhaust option is a +. When I get home I close the bedroom and turn it on and it gets the heat concentrated in the room out and then at night I have one side in and the other out, It cools the room like an air conditioner. If it is hot out at night I just have it in exhaust and it does a desent job on keeping the temperature down inside. I went ahead an ordered 2 more last year for a second room and the living room. The temperature controls work great and it is a great option. They fit great in the windows. I love them."