This system we installed is called a ductless, mini-split, heat pump. I have never seen one before because we have always installed systems in houses with many rooms, and these are not made for that application. The indoor unit just mounts to the wall and supplies heated or cooled air from that one point, although, you can buy these systems with up to four indoor units. Since our shop is basically one large room, this system works perfectly.
These are easy to install and come from the factory pre-charged with enough freon for up to 25 feet of tubing (we only used 8 feet since the outdoor unit is directly outside the wall from the indoor unit). You do have to have a vacuum pump and gauges to hook up to the service port to evacuate the tubing and indoor unit prior to opening the freon valve. That, and a flare tool are the only special tools you need. By-the-way, I set a new personal lifetime record on this install. Made six flare connections in a row without forgetting to put the nut on before flaring. Didn't have to cut off a single flare. Here is what the indoor unit looks like:
This 12,000 Btu system is very quite and cools this shop nicely. I don't really try and cool my tool room or the upstairs area of the shop but, the main work area and office is about 1500 square feet, and this is doing just fine on that. Today it is 103 degrees outside so, it is a pretty good test.
If you have the right type of space to heat and cool (not chopped up into a lot of rooms) this is the way to go. Plus, it was fun doing the install.