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NorthWestern Energy (Gas) - Residential Energy Efficiency Rebate Program (Montana)

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 

Programmable Thermostats: $30/unit; maximum of 2 per account
Gas Heating Equipment Diagnostics, Repair, and Maintenance: $60 - $75
Boiler: $160-$200
Furnace: $108-$135
Water Heater: $80-$100
Water Tank Insulation: $7/unit
Room Heater: $120-$150/unit
Boiler Controls: $232-$290/unit
Pipe Insulation: $1.13-$1.41/ln. ft.
Building Insulation: $0.22 - $0.62 per sq. ft.
Northwest Energy Star Manufactured Home (Gas): $0.25/sq. ft.

Customer Service

NorthWestern Energy offers a variety of rebates for residential customers to make energy efficiency improvements in their existing homes. Customers who purchase an Energy Star programmable thermostat from a local retailer and install it in an eligible home can receive a $30 mail-in rebate. Details are located in the [ Programmable Thermostat Rebate Application].

The utility sponsored Insulation Rebate program is also offered for Montana's NorthWestern Energy customers. In addition, Northwestern Energy's E+ program offers rebates for a variety of gas heating equipment improvements including the installation of boilers, furnaces, and equipment insulation through the [ Natural Gas Savings for the Home Program]. There are also many rebates available for different types of water measures and insulation improvements, for both electric and natural gas space and water-heating. Customers building a new home are only eligible for boiler, furnace, boiler controls, and manufactured home incentives.

Other Information 

Gas fired technology rebates are to replace standard technologies with efficiencies specified on the program application
Diagnostics, Repair, and Maintenance rebates can only be collected once every 5 years