- Click on the “Heating” or “Cooling” button on the calculator.
- Select your desired AFUE (for Heating) or SEER (for Cooling) efficiency rating on the slide. The efficiency rating you select will be compared to a base heating or cooling system in your area of residence.**
- Lastly, use the drop-down menu to select the area where you live. This helps determine fuel and electricity rates, which vary by region. (Canadian provinces are listed at the bottom of the menu).
Potential dollar savings are shown in the bottom half of the calculator.
*Energy Efficiency and Renewable Energy Network, U.S. Department of Energy
**Air conditioner calculations are based on every $100 spent to cool a home using a 3-ton, 13-SEER unit. The criteria base for furnaces is a 60% AFUE unit, with a 50,000-Btuh heating load. Fuel rates and heating hours are factored into the calculation upon selection of a state or region. If a state is not selected, the calculator defaults to the U.S. national average for fuel and electricity consumption. Actual costs and savings will vary depending on weather conditions, usage, location and local utility rates. This information is intended as an example for comparison purposes only.