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Originally Posted by gmblack3a  I have a 420sq ft garage and my portable unit is "rated" for 400sq ft. It will drop the humidity 10-15% (from 80% to 65-70%) but will only drop the temp a few degrees. I would think that my un-insulated garage door has alot to do with this. I even place a fan in front of the AC unit to spread out the cool air. |
Your garage is the same size as mine. Mine has a really high ceiling. About 18 feet if I were to guess. Insulating the garage door last summer really helped with the heat.
Now I'm wondering if I shoulda gone with the 12,000 btu unit.