Originally Posted by Phoenix
The motor is quiet, but the fan noise can be a little annoying, expecially on HIGH. However, if you want to move a lot of air, there really isn't any way to avoid the noise, expecially with this compact design. The best way to reduce the noise is to install two (or more) fans, and run the one farthest away from where you are on OUT. That way the cool air is drawn in through the FF that is OFF. For example, in our 19-foot Bambi, we run the FF over the dinette table at night, and the cool air is drawn in through the FF over the bed (that is OFF) and though the side window. That way most of the fan blade noise is in the far end of the trailer.
If you have the windows open, you could just run both fans on the exhaust setting, but at a lower speed. You'd get the same or more air movement (net) but the fans could run slow enough that their noise was inobtrusive. Alternately, you could run the far one full tilt on exhaust and the near one on a low setting blowing air in.
Of course, I don't have a Fantastic Fan yet, and the OEM fan in my '75 is plenty noisy. Glancing over at the 100.9F indicated on my outdoor thermometer, I can't imagine wanting to open a window or vent right now anyway though.