Central AC System GuideCentral AC tool
SEER2 Upgrade Savings Calculator
Estimate annual cooling cost savings from moving to a higher SEER2 system using your current cooling cost and both ratings.
Screening estimate only.A professional Manual J load calculation is authoritative for final central AC sizing and equipment selection. Confirm any decision with a licensed HVAC pro.
Screening result
Fine Print and Sources
Screening estimate only. These tools use only the values you enter and simple planning math. A professional Manual J load calculation is authoritative for equipment sizing, room loads, and final purchase decisions. Confirm with a licensed HVAC pro before you buy.
Savings scale with the ratio of the two SEER2 ratings applied to your current cooling cost. Actual savings depend on climate, setpoint, run hours, and installation quality. Payback depends on install cost, which this tool does not estimate.
- EnergySage central air conditioner sizing guide: explains square-feet-per-ton screening ranges, notes one ton equals 12,000 BTU/h, and warns that oversizing causes short cycling and poor humidity control.
- ENERGY STAR central air conditioning: describes right-sizing and efficiency selection for central AC equipment.
- ENERGY STAR central air conditioner criteria: defines SEER2 as a seasonal efficiency rating used to compare cooling systems.