We tried a Porta Cool a few years back, with not much luck. Turned in to a nice big fan. I know it's hard to justify, but we are air conditioned. We truly believe we will have more consistent production through the long hot weather if the folks working for us are reasonably comfortable. It doesn't stay cool, but it's not miserable either. I remember what it's like working in 110 degrees for twelve hours, and I don't want my employees to have to do that. In my mind A/C= Higher production and sustained quality ALL DAY