[MelZ]

I had "the solar guys" (they advertise here) install a solar attic fan on our house in December, so we will not know the true saving till the summer is over. They also installed a solar tube at the same time. They were very helpful and did a excellent job.

I went with solar because in our home up north I had a wired attic fan and had ongoing issues post warranty. The motor burnt out and created a short, I had to get an electrician to trouble shoot the problem. The installer had used the same line as a in house circuit, and the breaker kept tripping.

With Solar if the unit ever fails you can't effect you home wiring. I prefer the solar unit because their are less things that can go wrong in the future.