While we're on the subject...


My shop is a 4000 square foot metal building with just a little insulation.
I've got 2 residential air conditioning units that keeps it bearable, but
not comfortable in our Missouri summers. I've heard that our humidity is too
high to use an evaporitve cooler in this area effectively, but I've always
wondered how one of those would do in a shop that has two central air units
running non stop. Would it actually add any cooling? Would it cause my
equipment to rust? It would sure be cheaper to operate than a 3rd AC unit.