Central AC System GuideCentral AC tools
Central AC Tools: Tonnage, SEER2, and Operating Cost
Client-side central AC tools for estimating cooling tonnage, comparing SEER2 efficiency, and estimating operating cost.
Calculator
AC Tonnage Sizing Calculator
Estimate central AC tons and BTU/h from home square footage and a broad climate factor before getting a professional Manual J load calculation.
CalculatorAC Operating Cost Calculator
Estimate seasonal cooling electricity use and cost from your AC size, SEER2 rating, run time, season length, and electric rate.
CalculatorSEER2 Upgrade Savings Calculator
Estimate annual cooling cost savings from moving to a higher SEER2 system using your current cooling cost and both ratings.
CalculatorAC Repair or Replace Estimator
Weigh AC age, repair cost, and new system cost to see whether repair or replacement is the more sensible direction.