20251210Final Approved Tariffs.pdf

I.P.U.C. Gas Tariff
Rate Schedules IDAHO PUBLIC UTILITIES COMMISSION
Third Revised Sheet No. 16 (Page 1 of 2 Approved Effective
Name December 10,2025 January 1,2026
of Utility Intermountain Gas Company Per ON 36866
Commission Secretary
Rate Schedule EE-RS
RESIDENTIAL ENERGY EFFICIENCY REBATE PROGRAM
AVAILABILITY:
The Intermountain Gas Company Energy Efficiency Rebate Program (EE Program) is available
throughout Intermountain's service territory to eligible residential account holders served under the
Company's Rate Schedule RS.
PROGRAM DESCRIPTION:
The purpose of the program is to encourage upgrades to, or use of, high-efficiency natural gas
equipment. This will be achieved through the use of rebates offered towards the purchase and installation
of qualified energy efficient natural gas equipment and construction of energy efficient new homes.
ELIGIBILITY:
To qualify for rebates, customers must meet the end-use qualifications identified in the Rebates Table
below. All equipment must use natural gas as the fuel source. The customer must also comply with the
current program Terms and Conditions.
To qualify for Space Heating rebates, a dwelling must use natural gas as the sole heat source upon
installation of rebate-qualified equipment.
To qualify for Water Heating rebates, a dwelling must utilize natural gas for water heating upon
installation of rebate-qualified equipment.
Space Heating rebates may not be combined with New Construction rebates. Water Heating rebates may
be combined with New Construction rebates.
Issued by: Intermountain Gas Company
By: Michael Parvinen Title: Director— Regulatory Affairs

I.P.U.C. Gas Tariff
Rate Schedules IDAHO PUBLIC UTILITIES COMMISSION
Fifth Revised Sheet No. 16 (Page 2 of 2 Approved Effective
Name December 10,2025 January 1,2026
of Utility Intermountain Gas Company Per ON 36866
Commission Secretary
Rate Schedule EE-RS
RESIDENTIAL ENERGY EFFICIENCY REBATE PROGRAM
(Continued)
REBATES:
Rebate Rebate Type Minimum Efficiency Rating Rebate
Amount
Whole Home Tier I New Tier I Requirements: $900
Construction 0 HERS rated
• Air sealing at or below 3 ACH at 50 Pa
• Ceiling insulation at or above R-49
• Ducts and air handler located inside
conditioned space or duct leakage to
outside of less than 4 CFM25/100 ft2 CFA
• Furnace efficiency at or above 97% AFUE
Combination Boiler for Space Heating 95%AFUE $800
Space and Water Heat
Furnace Space Heating 95%AFUE $275
Boiler Space Heating 95%AFUE $800
Tankless Water Water Heating .91 UEF $325
Heater Tier I
GENERAL PROVISIONS:
All installations of equipment must comply with all codes and permit requirements applicable in the state
of Idaho and must be properly inspected, if required, by appropriate agencies. Customers must submit
required documentation of purchase and installation to the Company under the Terms and Conditions of
the current rebate program. The Company reserves the right to verify installation prior to the payment of
any rebates.
Issued by: Intermountain Gas Company
By: Michael Parvinen Title: Director— Regulatory Affairs