10 or 12 years ago, I saw a guy who built a hay bale structure with an evaporative cooler at Burning Man. It was the first time I'd seen one in real life, and i

10 or 12 years ago, I saw a guy who built a hay bale structure with an evaporative cooler at Burning Man. It was the first time I'd seen one in real life, and it worked really well (it was a hot, dry year...not all of them are).