Fan installed easily, comes on when the sun hits the panel. Fans work nice and each move a lot of air through them. Put one toward the front of the house, the other towards the back of the house, both on a South facing slope.

Gave 4 out of 5 because I have not had the fans installed long enough and it is starting to get cooler. Next summer will be the real test of how well they work and cool the attic. So far , I see about a 5-10 degree drop in the attic temperature in November.

Great customer service from H-MAC Systems. I ordered two fans for my house, one came in damaged. They had UPS pick up the damaged fan and shipped out a new one to replace it all withing one week.

(Posted on 11/13/10)