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Alliant Energy Interstate Power and Light (Gas) - Business Energy Efficiency Rebate Programs

Local Government
State Government
Federal Government
Multifamily Residential
Savings Category 
Water Heaters
Steam-system upgrades
Programmable Thermostats
Duct/Air sealing
Building Insulation
Comprehensive Measures/Whole Building
Custom/Others pending approval
Food Service Equipment
Tankless Water Heater
Maximum Rebate 

Insulation: $5,000 (each type)
Sealing: $1,500
Multi-Family Insulation/Sealing: $5,000

Program Info
Sector Name 
Interstate Light and Power (Alliant Energy)
Program Type 
Rebate Program
Rebate Amount 

Custom: Based on Annual Dollar Energy Savings
New Construction: $0.60 - $1.90/Therm, plus modeling and design assistance

Insulation: 70% of cost up to $5,000
Sealing: 70% of cost up to $1,500
Multifamily Incentives: Varies
Doors (Replacement): $25 - $200/unit
Boiler: $300-$800
Furnace: $500-$700
Boiler Vent Damper: $150
Programmable Thermostats: up to $50
Water Heaters (Tankless): $200
Water Heaters (Condensing): $300
Water Heaters (Tank-type): $70
Commercial Food Service Equipment: Varies widely
Drain water heat transfer system: $400
Outdoor Swimming Pool Cover: $0.50/sq.ft.
Outdoor Spa/Hot Tub Cover: $7/sq.ft.
Steam Trap: $100
Duct Repair and Sealing: $0.15/linear foot
Duct Insulation: $0.3/linear foot


Interstate Power and Light (IPL) offers a wide variety of incentives for commercial customers to save energy in eligible facilities, whether they are upgrading existing facilities or building new ones. IPL also offers a free business energy audit program. Landlords and renters of multi-family homes can also take advantage of various cash-back rewards for energy-efficient equipment in the residential and commercial programs.

Existing Facilities

IPL offers standard rebates for a variety of appliances; heating, cooling and hot water equipment; building shell improvements; lighting and ceiling fans; commercial food service equipment; premium efficiency motors and variable speed drives; and vending machine controllers. A Cash Rewards Booklet can be found on the program web site outlining incentive amounts and program guidelines. This booklet details which incentives are specifically available to gas and electric customers.

Commercial New Construction

IPL's Commercial New Construction program offers commercial customers incentives for both the design of high efficiency buildings as well as the construction. Design team incentives are based on the square footage of the building. Construction incentives are per kilowatt-hour plus an additional per therm rebate. Further information on incentive amounts, construction specifications, and how to apply are located on the program web site.