Yeah Ken, I learned in my years working commercial GHs that good air uses the heat better and prevents disease and pest. I run 3 fans, 2- 4" computer cooling fans, mounted along the peak pointed down the side roof slope to sort of tumble the air around like a big drier. They only use 1/4 amp, so they're probably pennies a week or month. They also prevent things from overheating on that south side. I also run an 8" box fan corner to corner about 4' up.
Since I did my floor to tilt in with a brick center I can and do wet it on warm days and not worry about ice build-up under the sill plates and breaking the concrete.
