Advice on new Construction HVAC
Wanting to get some thoughts on the HVAC for my new build. House is in NW Florida, 1900 sq ft downstairs, 1800 sq ft upstairs. Going to use a Nutone 13 SEER HP that I had put in our old house before we tore it down for the upstairs. I have the old air handler that was used for that unit but if upgrading it would make a big difference I will consider it.
My main question is how much a 2 stage unit will benefit me in this setup? How much more does that usually cost over a single stage? Average payback period?
Any help is greatly appreciated.