AC Running Cost Calculator
ENERGY STARSEER/EERMulti-Year Analysis
ENERGY STARSEER/EER
AC Running Cost Calculator
Enter your AC unit details to calculate annual electricity costs
Frequently Asked Questions
Common questions about this calculator
Enter your AC units capacity (BTU/hr or tons), SEER/EER rating, daily usage hours, electricity rate, and cooling season length. The calculator determines power consumption using P = BTU/(SEER × 1000) and multiplies by usage time and electricity rate.
SEER (Seasonal Energy Efficiency Ratio) measures cooling output divided by electrical input over a season. Higher SEER = lower running costs. A SEER 16 unit costs about 25% less to operate than a SEER 12 unit for the same cooling.
A typical 3-ton (36,000 BTU) AC with SEER 14 uses about 2.57 kW. At $0.12/kWh, thats $0.31 per hour of operation. Use our calculator with your specific unit specs and local electricity rates for accurate estimates.
Our calculator shows upgrade ROI by comparing your current units costs to higher-efficiency alternatives. Generally, upgrading from SEER 10 to SEER 16 can save 30-40% annually, with payback periods of 3-7 years depending on usage and climate.
Electricity rates directly multiply your running costs. At $0.15/kWh vs $0.10/kWh, your costs are 50% higher. The calculator factors in your local rate and can model time-of-use pricing for more accurate seasonal estimates.
Key factors: 1) SEER rating (efficiency), 2) Proper sizing (oversized units cycle inefficiently), 3) Thermostat settings (each degree cooler adds 3-5% cost), 4) Maintenance (dirty filters increase consumption 5-15%), 5) Home insulation and duct sealing.
The calculator uses standard HVAC engineering formulas and provides estimates based on your inputs. Actual costs vary with weather patterns, thermostat behavior, and unit condition. Results are typically within 10-15% of actual costs for well-maintained systems.
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