m0useanswered grow question 2 years ago The style of AC unit you are speaking of increase humidity in the air.They are only effective in cooling when RH is below a specific threshold. In essence its blowing room temp air over ice blocks and lowering its temp, in the process the ice melts and some evaporates as moisture, in a dryer environments it evaporates faster, and in humid ones it does jack all. Your better off not using it if you cant keep your RH in check, but if you can keep RH stable, then go nuts.
Good Luck!