Any thoughts on which is better given roughly the same cost of installing one 24,000 btu mini split vs two 12,000. We are replacing a PTAC unit (HVAC like in hotels) with a mini-split for our sunroom. I was planning to build a woodshop (2 or 3 car garage), but the cost is more than I want to pay right now. In the interim, I'm using part of our attached 4-car garage for woodworking. My plan is to put up a wall in the middle and use one side for my shop. I want to put a mini-split in so I can work there year-round. The "new" 2-car garage and sunroom are almost identical in size.
The only difference in installation is the single unit would require a longer run for the lines to the sunroom as opposed to placing a second unit in the optimal location. The distance is still well within limits.
My HVAC guy says it's a wash. He installed two in his house, but said it was really only for ease of installation. I'm thinking the same. If I install two, the second one would be in the best location and require the shortest run for the lines. I already have 220v in both locations. Ideally I would put the garage unit at that other end of the garage. Unfortunately I don't have a good (inexpensive) way to get 220v there.