I have installed two of these gable exhaust vents in my attic and they are a great product. One has been running for over a year with no problem. The second I installed a few weeks ago and a third (and final) is going in asap. I have a 100+ year old home with a new asphalt shingle roof. The roof was thrown on by a fly-by-night contractor in the weeks following Hurricane Katrina and lacks any kind of venting. As a result, the attic was blazing hot in the summer months. These fans have made a VAST difference in attic temperature and in the amount of time my air conditioner runs on hot days. The fans are well built, run quietly, were easy to install, and with a 20 watt solar panel they move a lot of air. They are the best purchases I've made in quite some time.