SEER2 and HSPF2 replaced SEER and HSPF in 2023. What each rating measures, how to convert old ratings, the current federal minimums, and which numbers are worth paying for.
Air Conditioning
Air conditioner sizing, efficiency and replacement guides.
A single-zone ductless mini split costs about $2,500 to $6,000 installed; a whole-house multi-zone system $6,500 to $20,000. How that compares with central air, and which to choose.
A heat pump is an air conditioner that can also heat. Cooling performance and efficiency are the same; the heat pump costs a little more and can replace your furnace. Here is how to decide.
Replacing central air costs about $5,000 to $10,500 in 2026, or $9,000 to $16,000 with new ductwork. Prices by tonnage and efficiency, plus when to choose a heat pump instead.