1. Click on the "Heating" or "Cooling" arrow.
2. Use the drop-down menu next to the arrows to select the area where you live. This helps determine fuel and electricity rates, which vary by region.
3. Click on a number on the blue screen to select an AFUE or SEER rating. The efficiency rating you select will be compared to a base heating or cooling system.

** Potential dollar savings are shown at the top-right portion of the screen, and the percent of annual savings is displayed at left.