HVAC Efficiency Calculator

Compare HVAC systems by efficiency rating (SEER, AFUE, HSPF) to estimate energy and cost savings from upgrading.

Save
USD
SEER
SEER
USD

Annual Cooling Savings

356 USD

Efficiency Improvement44.4 %
Payback Period16.9 years
New Annual Cooling Cost444 USD

Annual Cooling Savings vs Annual Cooling Cost

View formula & how it works →

How to Calculate HVAC Efficiency Savings

HVAC efficiency ratings tell you how much cooling or heating you get per unit of energy.

Key Ratings

  • SEER (cooling): Higher is better. Minimum is 14-15, high-efficiency is 18-25+
  • AFUE (gas heating): Percentage of fuel converted to heat. 80% to 98%
  • HSPF (heat pump heating): Higher is better. 8-13

    • Formula

    New Cost = Old Cost * (Old SEER / New SEER)

    Savings = Old Cost - New Cost

    Example Calculation

    Upgrade from SEER 10 to SEER 18 AC with $800/year cooling costs and $6,000 upgrade cost.

    1. 01New cooling cost: $800 * 10/18 = $444
    2. 02Annual savings: $800 - $444 = $356
    3. 03Efficiency improvement: (1 - 10/18) * 100 = 44.4%
    4. 04Payback: $6,000 / $356 = 16.9 years

    Frequently Asked Questions

    Related Calculators

    Heat Pump COP Calculator

    Calculate heat pump efficiency.

    Insulation Savings Calculator

    Reduce HVAC load with insulation.

    Energy Star Savings Calculator

    Savings from efficient systems.