10 gauge
This is a very good idea.
** "Looking at building a cooler ourselves. Buddy has a box off of a delivery truck about 16" long and we are thinking of framing it in, insulating it and sticking a window unit or two in it to help on warmer days".**
I may find a good used REF and put in my shop and ONLY run it Nov. - Jan ? I'll get serious about that this year.
Jerry