Compare the approximate electricity use and annual cost of two central air-conditioning efficiency scenarios. Use ratings measured under the same standard.
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Annual cost is estimated kilowatt-hours multiplied by your electric rate. This follows the rough SEER operating-cost method published by the Air-Conditioning, Heating, and Refrigeration Institute.
Use the result to compare assumptions—not as a promise of bill savings. Ask a qualified contractor for a load calculation and a project-specific estimate.
The operating-cost formula is adapted from AHRI's homeowner guidance for Seasonal Energy Efficiency Ratio. The calculator does not retrieve or license AHRI directory data.
Use actual written quotes and editable assumptions. Age and previous repair spending are context, not a universal replacement rule. No recommendation, diagnosis, or guaranteed remaining life is produced.
Enter both quotes, comparison years and all cost assumptions (use zero explicitly where appropriate).
Scenario arithmetic: quote + future repair allowance + years × (annual operating + maintenance). Prior repair spending is already incurred and is not counted again. Financing, inflation, incentives, later replacement costs, and uncertain equipment life are excluded; record those separately before deciding. See the cooling calculator for a transparent cooling-only estimate.
Prepare questions and accessible records; let qualified professionals assess equipment sizing, electrical capacity and site suitability on site.