It's really amazing how often I hear that same story: poor choices by the installer left the home owner in a bind with a poorly functioning system. The industry (certainly the residential side) really does need better educated installers/planners.

Even as a homeowner who's a bit of an energy geek, it's entirely too challenging to understand the entire space and what options fit one's needs. LLM's help a lot here (if you can trust them!), but it's a funny situation where there's silos of knowledge that are hard to connect.