Residential Energy Efficiency Rebates

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.

Attic Insulation R-value of Materials and Depths: $1 per square foot/$3,000 maximum rebate

Material

R-value per inch

R-value at 15”

Fiberglass (batt)

3.1-3.4

46.5-51.0

Fiberglass (blown)

2.2-4.3

33.0-64.5

Mineral Wool (batt)

3.1-3.4

46.5-51.0

Mineral Wool (blown)

3.1-4.0

46.5-60.0

Cellulose (blown)

3.2-3.7

48.0-55.5

For attic insulation, the final level of insulation (preexisting and new) must have a minimum R-Value of R49. 

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%–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, contact Bernie Saban at sabanb@naperville.il.us  or (630) 420-6135.