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Existing Buildings (Washington)

No matter the size or type of your business, Energy Trust offers a variety of incentives for qualifying natural gas upgrades. Incentives may help lower your upfront costs and make energy-efficient improvements more affordable. These upgrades can deliver long-term energy savings, lower operating costs and improve employee and customer comfort. Energy savings often pay for improvements in just a few years, helping you achieve a faster return on your investment.

Incentives are available for commercial firm and interruptible sales customers served on rate schedules 1, 3, 41 and 42.

Project Examples

Existing Buildings (Washington)


Project Type: Roof insulation
Project Cost: $67,200
Standard Incentive: $17,500
Bonus Incentive: $17,500
Annual Savings: 9,000 therms

Existing Buildings (Washington)


Project Type: Modulating Boiler Burner
Project Cost: $28,500
Incentive: $3,800
Annual Savings: 1,500 therms

  1. Check your eligibility.

    Read More >

    Energy Trust provides cash incentives to businesses for energy-efficiency and renewable energy projects. To qualify, you must:

    • Have a commercial, industrial or institutional facility project site in Washington served by
      NW Natural. Washington customers are eligible for gas incentives only. Additional requirements may apply.
  2. Find a trade ally contractor.

    We can help you get started.

  3. Install equipment that meets the requirements listed in the Washington Existing Buildings Application.

    Confirm equipment requirements here.

  4. Submit documentation.

  5. Get your incentive.

    Note: A post-installation verification may apply.

See incentives available for Washington existing buildings equipment outlined in the table below. Review the incentive application for equipment specifications and requirements before starting your project.

Equipment Incentive
New Rooftop Unit with Demand Controlled Ventilation (DCV) $29/ton
Advanced Rooftop Controls (ARC) – Full Retrofit $300/ton
Infrared Radiant Heaters $1.25-$2.25/kBtu/h input
Commercial Smart Thermostat $500 each
Commercial Condensing Gas Furnace $8.25/kBtu
Commercial Condensing Gas Tank Water Heater $3.50/kBtu/h input
Commercial Condensing Gas Tankless Water Heater under 200 kBtu/h $140 each
Commercial Condensing Gas Tankless Water Heater/Boiler at least 200 kBtu/h $1.40/kBtu/h input
Commercial Condensing Gas HVAC Boiler $6.50/kBtu/h input
Modulating Boiler Burner $10/kBtu/h of burner rated capacity
Steam Traps $400 per repaired steam trap
$500 per replaced steam trap
Swimming Pool Heater $0.90-$5/sq ft of pool surface area served by heater
Commercial Pool Cover $6/sq ft of pool surface area
Commercial Clothes Washer, Common Areas $100 each
Ozone Laundry System $5,000-$30,000 per system
Two-stage Gas Valves on Clothes Dryers $400-$700 per valve
Gas-fired Automatic Conveyor Broiler $2,500-$3,500 each
Gas Convection Oven $315 each
Gas Combination Oven $750 each
Gas Single Rack Oven $1,500 each
Gas Double Rack Oven $2,000 each
Gas Steam Cooker $3,400 each
Commercial Vent Hood Retrofit with Demand Controlled Ventilation $1,500/controlled motor hp
Retrofit Doors on Freezers or Refrigerated Cases $200-$350/linear ft of door
New Cooler Cases with Doors $150/linear ft of door
Attic Insulation $0.90/sq ft
Roof Insulation $1.00-$2.85/sq ft
Wall Insulation $1.30/sq ft
Commercial Pipe Insulation $18-$25/linear ft

Ready to apply for standard incentives? Download  application forms. If you need guidance, just ask your trade ally contractor for assistance.

Custom Incentives

Energy Trust offers custom incentives for larger, more complex projects. Learn more about custom incentives >

Incentives are subject to funding availability and may change.

Incentives also available for businesses located in Southwest Washington.

Need Help? Contact Us.


Success Stories

Camas School District, Camas, Washington

Camas School District, Camas, Washington

Estimated Annual Savings: $39,300

Cash Incentives: $165,900