That's 80% screen used in my Den cooling screens..
http://ecorenovator.org/forum/renova...n-project.html
Here's Gary's screen testing.
New Page 1
I'm not clear on the exact air-flow of the screen-collector design.
I'm still studying it. I'm in no rush, since I have no place to install the collector.
Hot air collectors on a second floor seems crazy, unless it's your primary living space, during daylight hours..
I just want to take the freakin chill out of my basement..