Having spent some time at a Physical Therapy lab I can't help but look at the Hospital curtains. Ideally I need the curtains to "breath" or at least let the air from my fans through. To hot to be cooped up. I like the way the hospital curtains work and they are vented for about 3 feet at the top. One time before I tried roll up bamboo window shades. They let air through and the shavings didn't collect on them but they blocked too much outside light. You can get them in lots of sizes and they are inexpensive.