DIY a mini split in your garage? See how to size it, check a 15A breaker, seal...
https://fun-wiki.win/index.php/SEER2_vs_HSPF2:_Which_One_Matters_More_for_My_Garage_Workshop%3F
DIY a mini split in your garage? See how to size it, check a 15A breaker, seal the line-set hole, and plan for cold snaps