Proper attic ventilation is important. How important? We should have between 10 and 12 fresh air exchanges per HOUR in our attic space! So what can we do to acheive this; Solar Attic Fan. With the proper installation, and the right amount of NET FREE Ventable Area, a solar attic fan can and will do the job. However, BE AWARE OF JUST ANYONE INSTALLING THESE. I go into homes where the roof has been replaced and fans were sold. The installations end up costing you more money though when a roofer or any other non-qualified individuals install them and then do not air seal or duct seal your home. Add a fan without doing this helps air you are losing to escape faster!