misting systems/cooling gh

[Carolina girl]

I'm going into my first summer with my new 14x28' greenhouse. I live in hot, humid coastal South Carolina. Have got 70% Aluminet raised a few inches above the roof. I'm researching installing a misting system for cooling and to raise humidity.

Anyone have any info on the effectiveness of over the bench vs. under the bench misting for keeping temp down? Pros and cons either way? I'd like to keep my foliage pretty & worry about misting above causing deposits, but foremost I need maximum cooling.

How about use of a humidistat vs. setting timers to switch system off and on? I'm inclined to think the humidistat would be worth having, but are they a problem w/maintainence?

I know either way to have the system shut off a couple of hours before sundown.

What type of misters? - 2 gal/hr ??

Thanks in advance for any experiences/advice.