NorthWestern Energy (Gas) - Commercial Energy Efficiency Rebate Program

July 26, 2023


NorthWestern Energy offers multiple rebate programs for commercial and industrial customers to make energy efficient improvements to their businesses. Incentives are available for heating, insulation, water heating, appliances, and electronics.  The E+ Commercial Natural Gas Savings Program offers incentives on a variety of equipment designed to improve energy efficiency. Prior to rebate payment, NorthWestern Energy representatives may inspect completed jobs.

Rebates are available to commercial natural gas customers in existing commercial facilities. New construction does not qualify. The detailed E+ Commercial Natural Gas Savings Program Application can be found here.

Program Overview

Implementing Sector: Utility
Category: Financial Incentive
State: Montana
Incentive Type: Rebate Program
Web Site:
Administrator: NorthWestern Energy
Start Date:
Eligible Renewable/Other Technologies:
  • Equipment Insulation
  • Water Heaters
  • Heat recovery
  • Building Insulation
  • Other EE
  • Food Service Equipment
  • Commercial Cooking Equipment
Incentive Amount: Insulation:
Basement Side Wall - $0.50/sq. ft
Attic - $0.40/sq. ft
Water Heater - $7.50/unit
Hot Water Pipe - $0.75/linear foot
Exterior Wall - $0.35/sq.ft.
Duct Sealing/Insulation - $1.50/sq.ft.

Modulating Gas Valve (Furnace or Boiler):

Hot Water Temperature Setback:
$0.15/Gallon to 110 deg. F

Kitchen Faucet Aerator:

Energy Star Convection Oven:
Boiler Stack Economizer - $2.00/Kbtu/unit
Motion Faucet Controls - $2.00/unit
Recirculation Controls - $190/unit
Equipment Requirements: Varies by product, see application forms


This program has 3 incentives
Technologies: Building Insulation
Sectors: Commercial, Industrial
Parameters: The incentive has a minimum of 0.50 $/square foot
Technologies: Commercial Cooking Equipment
Sectors: Commercial, Industrial
Parameters: The incentive is 40.00 $/Unit
Technologies: Equipment Insulation
Parameters: The incentive is 7.50 $/Unit, The incentive is 0.75 $/linear foot


Name: Customer Service Commercial Rebate Program
Address: PO Box 1167
Helena MT 59624
Phone: (800) 823-5995

This information is sourced from DSIRE; the most comprehensive source of information on incentives and policies that support renewables and energy efficiency in the United States. Established in 1995, DSIRE is operated by the N.C. Clean Energy Technology Center at N.C. State University.