solar vents

How Many Solar Attic Fans Do I Need? Attic Size Attic Fans Needed 2,100 sf (2) 32 watt OR (1) 48 watt 2,400 sf (2) 48 watt OR (1) 65 watt Do solar powered attic fans really work? The results were just as I expected. The solar attic fans all moved less than 1,000 cubic