I swapped the $100 window unit in my 30x50 shop for a Senville Aura 24,000 BTU mini split. Here's how it handles heat, cold, humidity and a hot truck, and why I'd keep a weekend shop at 60°.
What's a PTAC? What does an infrared tube heater look like? A real example of every way to cool or heat a garage or shop, from window units to radiant floor.
I've cooled my 30x48 pole barn shop with a $100 window unit for three years. Here's how the shop is insulated, when the little unit keeps up, and when it can't.