Will minisplits work in all floor plans?
I’m researching the details of building a new house in central KY, zone 4a. This will be the house that lasts for the rest of our lives (hopefully 50+ more years). I had assumed that GSHP were the “no-brainer” HVAC choice, but from the looks of things, it isn’t that simple. I’ve been reading some amazing things about the potential of mini split systems.
My question is this: Aside from getting your house as well insulated and tight as possible, do you need a certain floor plan or construction feature to make mini-splits work? Does the foorplan need to be open without many walls and closed rooms? Will this only work with smaller square footages? In other words, can I take a traditional, 2-story, “normal” house plan (3k-4k sq. ft.), wrap it up with R30 walls and R60 attic, and get good results with some mini split units, or do I need to build a house with a specific floor plan?
Also, what is the contingency plan if the mini splits weren’t getting the job done? What if the bedrooms were too hot and humid in the summers? Or what if parts of the house were too hot or cold? It would be a major pain at that point to try and go back in and install ductwork.