My garage had the vents in the garage doors, door insulation, and the fan in the attic which pulled air thru the vent in the garage ceiling. I thought the system was a complete waste of money. All it did was pull hot/humid air from the outside. It is a west facing garage. If you want the garage at a comfortable temperature to be able to spend time in it the only good solution is to insulate the attic and garage doors, then add a mini split.
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