Compare HVAC Energy Efficiency

HVAC Efficiency Comparison Calculator

Compare an existing HVAC system with a more efficient option. Estimate the change in annual electricity or natural gas use, yearly operating cost and long-term energy savings.

Compare HVAC Efficiency

Old vs New HVAC Efficiency

Compare two systems using the same heating or cooling load.

For cooling-only comparisons, you can also use our SEER2 savings calculator . If you want to include installation cost and calculate break-even time, continue to the HVAC payback calculator .

Compare Current vs Proposed HVAC Efficiency

Select the equipment type, then enter its efficiency ratings and annual energy use.

HVAC Equipment Type

Current SEER2 Rating

Proposed SEER2 Rating

Current Annual Cooling Electricity Use (kWh) Enter the electricity used for the cooling system if known.

Electricity Rate ($ / kWh) Replace the example rate with your actual utility rate.

Comparison Period

Estimated Annual Operating Cost Savings - -

This comparison assumes both systems serve the same annual heating or cooling load. Actual savings can differ because of weather, equipment sizing, installation quality, ducts, thermostat settings, cycling and real-world operating conditions.

- Estimated Energy Change

Current Annual Cost -

Proposed Annual Cost -

Current Energy Use -

Proposed Energy Use -

Current System -

Proposed System -

Comparing an HVAC efficiency upgrade?

Request HVAC help below if you want to provide your location and details about the current system.

Comparison method: for the same useful heating or cooling load, required energy is estimated as inversely proportional to the efficiency rating. SEER2, HSPF2 and AFUE are different metrics and should only be compared within their own equipment category. This calculator does not compare SEER2 directly against AFUE or HSPF2.