This extra high capacity Rand Solar Fan provides up to 2200 CFM (cubic feet per minute) of ventilation, and can successfully cool an attic space up to 3440 square feet. The solar panel includes adjustable angle bracket so you can dial in the optimal panel angle relative to the sun. This way you will get maximum performance of this solar fan.
This Solar Fan automatically regulates itself. When the sun is low in the morning, the solar fan runs slowly. As the Sun gets higher in the sky, your solar fan will automatically speed up to dissipate the extra heat. So, during the hottest part of the day, your fan is running at its fastest speed. And at night, it automatically shuts off. In addition, we include an 85 degree thermostat already installed! It will turn on the fan anytime your attic is above 85 degrees and there is sun shining. This greatly increases the life of the solar fan because it will not run when it is not needed.