Free Energy Attic Vent

The attic in our rented house is not insulated, and I was amazed how hot it gets up there during the summer. Replacing the screening under the eves allowed some airflow in, but the vent just doesn’t let sufficient air exit out the top to keep things cool.
I had a spare solar panel lying around, and got the idea to use it to power a ventilation fan on the roof. The panel itself can be almost anymore, but the key thing is that it be large enough to provide a reasonable number of amps to the fan.

The key is basically to find a automobile radiator fan that’s the same diameter as your vent pipe. Four metal screws in the pipe will keep the fan in place when you slip it in. Connect the wires from the fan to a solar panel on the roof and you’re good to go.

When the sun hits the solar panel each day, the fan starts spinning, and continues ar varying RPM depending on the angle and brightness of the sun. The extra suction moves additional air through the attic space keeping things several degrees cooler.

I am hoping to do some tests to see the temperature delta thanks to this system, but I think it will require multiple days of normalizing since its not totally accurate to try to equalize for temperature and sun from one day to the next.