Pick 2–4 systems to compare directly — capacity, SEER2, HSPF2, refrigerant, cold-climate rating, DIY-vs-pro install and warranty. Unpublished values show as "Not published"; nominal/line-level figures keep their caveat.
Add at least two systems to see the comparison.
Specs compiled from manufacturers / AHRI retailers; cross-check per SKU on the AHRI Directory and confirm with the dealer. Not tax advice.