The most common question @comfortguyjerry gets regarding ductless heating and cooling is: "Will that one unit take care of my whole house?" The answer is, no. They are designed to provide comfort for a single space. That single space can be a 'great room', a bonus room or upstairs family room, room addition to a house, or a shop. It is also very effective for mobile or manufactured homes. I think you get the idea. To do an entire home would require additional outdoor units, and multiple indoor 'heads', depending on your needs and size of your home.
You say, 'that sounds expnsive', and it can be, depending on what your needs are. The economy comes in during the monthly operation. They are so, so much more efficient, than traditional heating and cooling systems, and super high efficient central heating and cooling is expensive also. Ductless units are super quiet as well, being rated at just below a human whisper for many brands.
Think of it this way. Why turn on every light in the house when you need to use the bathroom? That's what you do every time your furnace or A/C come on. With ductless you only heat or cool the rooms that you need to, or use. I am also convinced that Mitsubishi makes one of the best ductless units on the market today. So the next time you hear the word "mini-split", don't start to salivate for ice cream and banana's.
For more information go to my website at www.greensheating.com.