Cities / Washington / Rebates
Cascade Natural Gas Washington Energy Efficiency Program: Open
Enrollment for 2026 is open. Open. Rebates are effective for installs on or after March 15th, 2026.
Serves: Bellingham, Mt. Vernon, Oak Harbor/Anacortes, Kitsap Peninsula, Grays Harbor, Kelso/Longview, Sunnyside, Wenatchee/Moses Lake, Tri-Cities, Walla Walla and Yakima areas.
Do I Qualify
- Be a Washington residential customer on rate schedule 503.
- Heat the home primarily with Cascade natural gas.
- A multi-zone ductless electric heat pump cannot be present.
How Much Comes Off
| Equipment | Requirement | Amount |
|---|---|---|
| Natural gas furnace | 95% AFUE minimum or higher. | $1,600 per furnace |
| Natural gas furnace | 98% AFUE minimum or higher. | $2,400 per furnace |
| Efficient thermostat | Programmable weekday/weekend or 5+1+1 schedule, or Wi-Fi enabled. | $150 per household |
Valid from March 15, 2026.
Who Files It
The customer applies. Payment may go to the customer or an authorized representative.
The provider pays either the contractor or the homeowner.
The Steps to Apply
- Use a licensed Washington contractor for the furnace.
- Submit the application and invoices within 90 days of installation. Program page.
Read on October 22, 2026 from the Cascade Natural Gas page. A change to this program is a dated line in the changelog.