Hi Friend,
You neglected to mention if you have a grow room in your garage, or if you're trying to control heat and humidity without an enclosure. If you do have a tent that you're venting to and from the garage you need a cooling air vaporizer. I have a nice little Levoit atomizer listed on Amazon that I bought before this years heat wave for $37. On the lowest setting it keeps my temperature at 77F and humidity at 60% inside a 5'x5'x7' grow tent while running 700 watts of LED lights. Hard to beat that.
Good Luck with your grow.
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