Evaporative air cooler

I can’t get temps down low enough with an exhaust fan so my last option is a evaporative air cooler. Anyone use these and have a recommendation on a good one that’s not expensive for a 3x3 tent? I’d really appreciate it!!
I don’t know if there is anything else I can do to get temps down at this point.

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Where is your temp at?

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90, I could deal with that in veg but I’m not loosing all my terps in flower