Cascade Natural Gas - Commercial Efficiency Rebate Program

January 16, 2023


Cascade Natural Gas Corporation's conservation program provides cash incentives for the installation of energy efficiency technologies. Customers can download an incentive request form from the utility's website and send it to the email address or fax number listed below. Incentives not included in the standard list may still be eligible for an incentive reward through the custom program if the project is determined to be cost-effective. Standard incentives are available to commercial and industrial customers on Rate Schedules 504, 505, 511, 570, and 577.

Incentives are only valid if the new equipment provides a significant efficiency increase over existing equipment. Customers requesting site-specific energy efficiency measures must submit estimated costs and natural gas savings associated with the project. To receive a conservation incentive, customers should provide an incentive request form, W9 Form, copy of a recent gas bill, quote for proposed equipment, final invoice marked “Paid,” and a manufacturer’s specifications sheet.

Program Overview

Implementing Sector: Utility
Category: Financial Incentive
State: Washington
Incentive Type: Rebate Program
Web Site:
Administrator: Lockheed Martin Energy and Environmental Services
Start Date:
Eligible Renewable/Other Technologies:
  • Clothes Washers
  • Equipment Insulation
  • Water Heaters
  • Furnaces
  • Boilers
  • Building Insulation
  • Windows
  • Insulation
  • Food Service Equipment
  • Commercial Cooking Equipment
  • HVAC
Incentive Amount: Heating
Warm Air Furnaces: $5.00/kBtu/hr
HVAC Unit Heater: $5.00/kBtu/hr
Radiant Heating: $15.00/kBtu/hr
Boiler Steam Trap: $125
Demand Control Ventilation: $60/nominal ton
High-Efficiency Condensing Boiler: $10.00/kBtu/hr
Mid-Efficiency Boiler: $6.00/kBtu/hr

Food Service and Kitchen Equipment
Gas Griddle: $600
Double Rack Oven: $2,500
Gas Convection Oven: $800
Gas Conveyor Oven: $700

Windows: $7.50 - $9.00/sq. ft.
Floor Insulation: $1.25/sq ft
Hot Fluid Pipe Insulation: $15.00 - $25.00/linear foot
Attic Insulation: $2.00 - $2.50/sq ft
Roof Insulation: $2.00/sq ft
Wall Insulation: $2.00/sq ft

Water Heating
Domestic Hot Water Tankless Water Heater: $120 - $150/gpm
Domestic Hot Water Recirculation Controls: $200
Domestic Hot Water Tanks: $3.00/kBtu/hr
Ozone Injection Laundry: $9,000

Equipment Requirements: Heating
Warm Air Furnaces: Min 91% AFUE
HVAC Unit Heater: Min—91% AFUE
Radiant Heating: Direct-fired radiant heating
Boiler Steam Trap: Min 300 kBtu in; steam pressure at 7psig or greater than, Retrofit Only
Demand Control Ventilation: 5 tons ≥, Unit Cooling Capacity ≥, 20 tons.
High-Efficiency Condensing Boiler: Min 90% Thermal Eff
Mid-Efficiency Boiler: Min 85% Thermal Eff

Food Service and Kitchen Equipment
Gas Griddle: ENERGY STAR > 38% Cooking Eff
Double Rack Oven: FSTC Qualified > 50% Cooking Eff
Gas Convection Oven: ENERGY STAR > 42% Cooking Eff
Gas Conveyor Oven: > 42% tested baking efficiency

Windows: U-Factor ≤ 0.30 to U-Factor ≤ 0.22
Floor Insulation: Min R-30
Hot Fluid Pipe Insulation: between 140F, < 200F, 1.5” insulation and ≥ 200F, 2.5” insulation
Attic Insulation: Min R-30 and Min R-45
Roof Insulation: Min R-30
Wall Insulation: Min R-19

Water Heating
Domestic Hot Water Tankless Water Heater: .87 UEF to .93 UEF/Thermal Efficiency
Domestic Hot Water Recirculation Controls: Continuous Operation DHW Pump. Retrofit Only. Pre-approval required.
Domestic Hot Water Tanks: Condensing tank, Min 91% Thermal Eff
Ozone Injection Laundry: Venturi injection or bubble diffusion – Min 125 lb. total washer/extractor capacity. Pre-approval required.


Name: Cascade Natural Gas Corporation
Address: 1180 NW Maple Street, Suite 310
Issaquah WA 98027
Phone: (866) 450-0005

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.