Do I Qualify
- You must be a residential natural gas supply customer upgrading an existing home.
- Former Energy West Montana and Cut Bank Gas customers are currently ineligible.
- Leased equipment, used equipment, new construction and garages do not qualify.
How Much Comes Off
| Equipment | Requirement | Amount |
|---|---|---|
| High Efficiency Furnace | AFUE ≥ 90%; replaces AFUE ≤ 80% furnace. | $425 per Unit |
| Programmable or Wi-Fi Thermostat | Minimum of 1 per home. | $70 per Unit |
Valid from August 1, 2026 to June 30, 2027.
Who Files It
The customer signs and submits the application. The check defaults to the account holder unless another payee is specified.
The money is paid to the homeowner.
The Steps to Apply
- Check both the old and replacement furnace efficiency before purchasing.
- Submit the signed form, invoices and a recent bill by June 30, 2027. Application.
Read on October 22, 2026 from the NorthWestern Energy page. The chart was printed Form 3749 MT-B 07/26. A change to this program is a dated line in the changelog.