energy efficiency | illinois

Building Shellarrows

Keep conditioned air inside your business where it belongs by upgrading your building shell. View our building shell tables.

Qualifications – Windows
  • Customer must submit a National Fenestration Rating Council label for each style of window with the rebate application.
  • The U-factor must be better (more efficient) than Illinois Energy Code to qualify for a rebate.
  • The SHGC must be equal to or lower than Illinois Energy Code to qualify for a rebate
  • Rebate will be prorated based on the type of energy purchased from MidAmerican Energy Company. Both fuels 100 percent; the split is 65 percent natural gas; 35 percent electric.
Note: For existing building only, does not include new construction. Rebate applications must be submitted within six months of dealer invoice for the equipment/material purchased.

How to apply for rebates
Download the windows application and include product specifications, dated invoices and installation date(s) and submit to MidAmerican Energy. Also include the NFRC labels for windows.

Once the equipment is installed and your application is reviewed and approved by MidAmerican Energy, your incentive check will be issued. Allow 4-6 weeks for processing.

Call 800-894-9599 with questions.

Nonresidential Equipment Custom Systems
Technology is always changing with new and innovative high-efficiency products. MidAmerican Energy encourages these innovations and if specific equipment you intend to purchase and install is not listed, it may qualify under Nonresidential Equipment Custom Systems.

  • All custom systems must have a less-efficient alternative available for baseline comparison purposes.
  • Preapproval is required prior to purchase or installation. Projects must be completed within 12 months of preapproval. Complete this preapproval form.
  • Eligibility is based on the qualifying equipment or system’s energy savings, peak demand savings, usage profile and incremental cost.
  • Equipment must be new.
View the Custom Project Calculation and Industrial Partners bonus incentive calculation.

Did you receive preapproval and need a self-verification form? Download Custom Systems Rebate Self-Verification Form.

Call MidAmerican Energy at 800-318-8915 with questions about application procedures, qualifying projects, incentives or verification procedures.


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New and Replacement Fireplaces Double Black Arrow
When building a traditional fireplace, install ducts around it so cool room air is drawn in and circulated around the firebox. Warmed air is ducted back into the room by convection. Learn More