Residential Energy Efficiency Rebates

The City of Naperville Electric Utility is offering rebates for homeowners who install energy-efficient attic insulation and windows.

• To qualify for the rebate, applicants must be residential Naperville Electric Utility customers who own or rent their residence.
• Improvements must be purchased and installed after March 18, 2020.
• The rebates are limited to 50% of the project, including material and installation, with a $3,000 maximum rebate for each energy-efficient improvement.
• Customers could qualify for a maximum rebate of $6,000 if they installed both attic insulation and energy-efficient windows.
• Rebates will end when all funding is allocated.
• Applicants must provide a copy of their current utility bill showing they are a contributor to the Renewable Energy Program at the $5 per month level or above. Renewable Energy Program contributions are the source of funding for these rebates. For more information and to sign up for the program, visit www.naperville.il.us/renewable.

Attic Insulation

For attic insulation, the final level of insulation (preexisting and new) must have a minimum R-Value of R49. A final depth of at least 15” is generally sufficient to reach the required R49 value.

Window Replacement

Windows must have a U-Factor of 0.30 or lower.

• The grant amount is $300 per window with a $3,000 maximum award.
• The window must separate a heated space from an unheated space and must replace a single-pane window with a double- or triple-pane window.

According to the Department of Energy, heat gain and heat loss through windows are responsible for 25% to 30% of residential heating and cooling energy use. For windows, the rate of heat loss is indicated in terms of the U-factor. The lower the U-factor, the greater a window’s resistance to heat flow and the better its insulating value.

For more information, please contact Bernie Saban at sabanb@naperville.il.us or (630) 420-6135.