I was thinking this morning that a simpler way of achieving what I would like to do is with a small solar panel? When the sun is out enough to heat up the window then it would create enough power to turn on the fan. The fan that I remembered I have is this one
Cooler Master Any thoughts? Is it beneficial? I know that if the sun is coming in the window then it is already heating the room, but my thought is that you can capture the heat off the window before it dissipates through the window and back outside.