The fan array for air circulation. Each fan draws 120mA at 12V, making the entire array take 48W when all 36 fans are running. I have them connected to a breadboard (covered in electrical tape in the plastic bag) with the intent of hooking them up to some type of climate control system at some point. This magical system will then be able to control the fans in groups (possibly independently) depending on the air flow desired. The calculated output of the array should be enough to recirculate the air in the greenhouse at least once per minute if they're all on. Supposedly you want this in a greenhouse, but I'm not quite convinced.

The fans are twist-tied together at the corners (using built-in holes) then screwed into the frame and sealed around the edges.