I recently purchased an older home. Built partially below ground level is a
room, approximately 14 x 10 x 7, with concrete ceiling, walls and floor.
There are no windows only a small door to the outside and two small vent
openings typically found on homes in this area to provide air circulation in
crawl spaces.

I'm considering installing my wine racks in this area and cool using a
portable air conditioner, vented through one of the existing vent openings
and closing off the other. I found a 7,500 BTU portable cooler with an EER
of 14 for $319. It has a thermostat setting range that goes down to 58
degrees. My thinking is that I can use this set up rather than walling off
an area and putting in a wine chiller at a much greater cost.

Am I crazy?