Replacing a window Do your doors or windows frost up on cold winter days? Do you feel cold drafts when the wind blows? These are signs that your doors and windows may need to be replaced with new ENERGY STAR windows and doors.

By replacing single-paned windows with double-paned ENERGY STAR windows, you can save an estimated $360 per year in heating and cooling costs in the typical Iowa home.

To qualify for Cash-Back Rewards windows and doors must be rated qualified for the Northern Climate Zone. ENERGY STAR Qualification Criteria for Residential Windows, Doors, and Skylights [PDF]

Download the 2010 Iowa ENERGY STAR Replacement Windows and Doors claim form [PDF]

Eligible equipment and rebate amounts:
Replacement Doors & Windows

Equipment	Rebate
Qualifying doors (5 max., min. size of 8 sq. ft. each)
Solid door ENERGY STAR rated (0.20 to 0.11 U-Factor)	$25 each
Solid door ENERGY STAR rated (≤ 0.10 U-Factor)	$50 each
Glass entry door ENERGY STAR rated (at least 50 percent glass and ≤ 0.30 U-factor)	$25 each
Qualifying replacement windows (min. size of 8 sq. ft. each)
ENERGY STAR rated (U-Factor 0.30 or less, min. size of 8 sq. ft. each)	$25 each

How do I qualify?

You must be a residential electric or natural gas customer of IPL in Iowa.
Replacement doors and windows must be installed in a conditioned space where IPL supplies the primary heating or cooling energy.
Replacement doors and windows must be:
- Energy Star rated for the Northern climate zone;
- Certified by the National Fenestration Rating Council (NFRC)
One opening = one window.

How do I apply?

Professionally installed equipment and measures: Have your dealer send a completed reward form, copy of the ENERGY STAR label or window specs and invoice to IPL within 90 days of installation.
Self-installed equipment and measures: Complete the appropriate reward form, attach the UPC code, copy of the ENERGY STAR label or window specs and a copy of the itemized, dated receipt and send to IPL within 90 days of installation.

2010 Iowa ENERGY STAR Replacement Windows and Doors claim form [PDF]

Alliant Energy-IPL does not guarantee that the installation of high-efficiency equipment will result in reduced usage or demand or in cost savings. Alliant Energy-IPL makes no warranties, expressed or implied, with respect to any equipment purchased and/or installed, including, but not limited to, any warranty of merchantability or fitness for a particular purpose. In no event shall Alliant Energy-IPL be liable for any incidental or consequential damage.

Products and services from Alliant Energy-IPL detailed here are offered to customers of Alliant Energy-Interstate Power and Light Co.

View additional application and qualification information.

View a list of 2010 Cash Reward Forms.