Living in eastern North Carolina is not fun weather wise from mid May through mid to late October. Hot, humid weather dominates the area. Whether you have your garage doors open or closed it gets brutal in there. I just installed the above mentioned 12,000 BTU unit in my garage and what a dramatic difference we are experiencing in less than a day. Much cooler, very dry (no humidity), it was very easy to install, plug in and appreciate the results.
Yes it my seem weird to put a unit in a garage but it is so very comfortable now while I am working on a car or any project.