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NorthWestern Energy - Residential Energy Efficiency Rebate Program

Savings Category 
Maximum Rebate 

Lighting: Maximum of fifteen CFLs and five lighting fixtures per calendar year
Programmable Thermostat: Two units per household

Program Info
Funding Source 

Montana natural gas and electric supply rates

Start Date 


Expiration Date 


Program Type 
Utility Rebate Program
Rebate Amount 

Proper Sizing AC or Heat Pump: $10/unit
Programmable Thermostat: $0.005-$0.006/sq. ft. controlled
Light Colored Shingles: $30/home
Door Foam Core: $10-$20/door
Duct Sealing: $350
Outlet Gasket: $5/home
Canned Light Sealing: $10 - $12/can
Building Insulation: $0.32-$1/sq. ft.
Refrigerator/Freezer: $15/unit
Clothes Dryer: $30/unit
Weather Stripping and Door Sweep: $20
Pool Pump Timer: $25

NorthWestern Energy

NorthWestern Energy offers a variety of rebates for residential customers to make energy efficiency improvements in their existing homes. Customers who purchase or implement energy efficient appliances, lighting, HVAC services, insulation and programmable thermostats are eligible for prescriptive rebates from NorthWestern. There are also many rebates available for both electric and natural gas space and water-heating. Details for all rebate offerings are found on the program web site listed above.

In addition to the home improvement rebates listed above, The E+ New Homes Program offers rebates for new home construction that incorporates certain energy efficiency measures. Members can receive rebates in the new home program in three ways: By installing Energy Star® light fixtures and CFLs, by building a home that qualifies under the NorthWestern Energy Star Homes standards, or by including other specific energy efficiency measures in the new construction.

Other Information 

Much meet efficiency requirements; see incentive applications for details