[widebody911]

My shop is 25x25 with 10' walls and a peaked ceiling. Right now I have a 10k BTU window-mount A/C unit that just really isn't up to the task. If it's 100° outside, it will bring the shop temp down to ~80°; if it's 105° outside, it's 85° inside. The shop is fully-insulated - even the door.

The A/C unit is mounted in a custom-made opening rather than a window.

I bought a 15k BTU unit, and I'm torn between just replacing the existing unit or adding a 2nd one. The existing one will be a PITA to get out and to mod the hole, but at the end of the day, I just have one hole. If I add a 2nd hole, I can just run one or the other, but I think both running at the same time might be overkill.

Both units are 110v; it would be an even bigger PITA to get 220v to where it needs to be.

Thoughts?