I have two 40 ton evaporative coolers sitting outside my office, they keep our condensing units cooled off here. So yes, I've run a bong. I've also built them for water cooling systems for computers, and also for thermatic setups; basically for on the fly testing of a water cooled condensing unit (for air conditioning or glycol chilling) where the radiator was off being repaired.
Not to say it won't work, but I consider high humidity 80 to 90%.
Plus, do you honestly think your load is heavy? No, your load is barely causing some of the water to evaporate. Your loads are tiny around here, you guys could be making these things from 2L bottles. If your going to make one, make it look good.
As far as my load goes, no I don't think it is 'heavy' compared to an industrial application. However that is comparing apples to oranges.
And at the end you come to your real objection. Appearance. Go figure.
Have a nice day.