Major upgrade for our new shed.
The Mr. Cool DIY requires no HVAC work for installation. The lineset and compressor are pre-charged with refrigerant. Simply make the connections, and open the valves.
Much like a propane tank connection.

Wow. My Pole Barn is now very comfortable to work in, and the John Deere 1025R is always cool and comfortable.
Much like the Mitsubishi mini-split system, this unit is very quiet.

Update: The heat worked great for us all winter. Of course, our shed is very well insulated.

Buy one like mine:
24k (may be out of stock)
18k (in stock last I checked)