I have a two story townhouse of about 1300 sqft. Two bedrooms and a bathroom upstairs, kitchen, dining room, living room, and half bath downstairs.

About 10 years ago we had a 36000BTU Mitsubishi multi zone ductless unit installed with 4x 9000BTU interior wall units. One each in the dining room, living room, and the two bedrooms.

It keeps the place cool in the summer and warm in the winter unless we get below 20F, then I fire up the pellet stove.

It cost us about $11k. Our installation would have been less expensive, but I had to pay extra in labor to have them run the lines through an interior wall to the second floor instead of on the outside wall because our of our condo complex rules. Normally they’ll just run the lines on the outside wall and cover it with a line set covering that sorta resembles a gutter running on the side of the building. Faster and cheaper.