New Update. In my non-climate controlled 2-car garage I have three S1 Antminers overclocked to 393 MHz. The temperature here in Santa Fe, New Mexico is 62F/17C, but the three miners bring the temperature up to a cozy 89F/32C inside the garage. I ran one miner for 8 hours without my custom cover, which then reported temperatures of 54C/57C in the "Miner Status" tab. After 30 minutes with the cover on the temperatures had dropped to 51C/53C, and after 45 minutes the temperatures had dropped to a stable 47C/50C. This equates to a 13 degree Fahrenheit drop on both boards.

I will be selling an improved version of the case within a week, with the price point in the .017 BTC range for quantities under 10, and ~.0155 BTC for 10+ units (based on the current exchange rate). The price will include UPS ground shipping with tracking inside the USA for orders of 10+, while smaller orders will be at a flat rate of .009 BTC for UPS shipping.