I'm not sure an AC unit will get things cool enough for aging
Evidently they will. I always thought you needed something special, but it looks like they just use a window unit. Check out the specs they recommend. This thread is pretty interesting. I might have to consider building one some time. Like most of us, the early season is too hot to let it hang, and late season it's cold enough to freeze it. Nothing worse than trying to cut up a frozen deer.
https://www.storeitcold.com/build-it/ac-selection/