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and energy efficient future

At NorthWestern Energy, we are dedicated to helping you save energy and money through Efficiency Plus (E+).  One of the easiest ways to get started is with a FREE home energy audit.

Our trained specialists come to your home and analyze your home’s energy usage.  You’ll receive tips to manage your energy usage more effectively, a customized report with recommendations of cost-effective energy improvements, and information on E+ rebates which may help you make appropriate investments.

Your home likely qualifies if you are:

  • A NorthWestern Energy residential natural gas or electric space- or water-heating customer in Montana.   
  • Your home is at least five years old
  • Your home has not received an E+ Audit since September 25, 1994

Your free home energy audit may include:

  • Blower door test to detect areas of leakage
  • Water heater temperature check
  • Refrigerator/freezer temperature check
  • Gas equipment safety check
  • Insulation evaluation
  • Free water heater tank wrap
  • Free hot water pipe insulation
  • Free low-flow faucet aerators and showerhead

A limited number of audits are available.   To request your free home energy audit, please fill out this form, or you may call the NorthWestern Energy Efficiency Program Hotline at 800-823-5995

Please complete this form and you will be contacted to schedule an audit at a time that’s most convenient for you.

My home is heated primarily with:



My hot water is heated with:



The age of my home is:

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Please provide the number where we may reach you between 7:00 AM and 5:00 PM (Mountain Time) Monday through Friday.
The information you provide is sent directly to the NorthWestern Energy E+ Audit Team and will only be used to schedule a home energy audit. You can be assured all contact information is private.
Thank you for your interest in the E+ Audit for the home program. We will contact you soon!
This program is limited to NorthWestern Energy residential natural gas or electric space- or water-heating customers in Montana or South Dakota. It does not appear that this home qualifies. If you have questions, please call 800-823-5995.