Estimate your savings

If you are interested in completing a custom project, use these calculators to estimate energy savings and payback

Please note: Savings figures are estimates only and are in no way guaranteed by the Nicor Gas Energy Efficiency Program. Estimated savings serve solely as an example of the therm and dollar savings that may be achieved by upgrading to high efficiency. Actual savings will vary, and depend on other factors not considered in these calculations. Rebates are available to eligible Nicor Gas customers for the purchase and installation of qualifying equipment. Additional requirements apply.

**Always consult your contractors and/or engineers for additional project-specific analysis and expected outcomes on energy efficient improvements.