I can’t speak from a ton of experience but I did go through this once. We are fortunate that we have a HVAC company that is locally owned/small and they don’t bullshit you. They told us that yes you’ll save a little money if you go up to the high end options they have, but even if it lasted us 30 years it probably would not pay for itself. They said the efficiency gains have diminishing returns past a certain % (I don’t remember the % they gave) but they recommended to just go with the middle of the road option because it was still above that diminishing return %. They had three options, we went with the middle one, so I’d just see what they have available and go with one or two steps below the most expensive.
No idea about the variable thing. The “paying for itself” part of your question doesn’t really come into play until decades down the road. Do you really care about saving a few hundred 20 years from now? Go with what’s going to be affordable, the least amount of maintenance, and works well for the size of your house.
Yeah that is the main reason that the 14 vs 16 thing isn't as relevant to me as the overall comfort of the house and family. Even running calculations on the efficiency gains put the break even out to 15 years, and that is just spreadsheet math. Real world it would probably be less. So I'm on board with the middle option for sure.
But like has been mentioned I just didn't know what the variable option brough to the table. It 90% isn't something we'll go with because of cost, but I asked them the question anyways.
Thanks for the inputs from everyone.
- 1