20260924Final Approved Tariffs.pdf

Fourth Revision Sheet 190 IDAHO PUBLIC UTILITIES COMMISSION
Canceling Approved Effective
I.P.U.C. No.27 Third Revision Sheet 190 September 24,2026 October 1,2026
Per ON 37181
AVISTA CORPORATION Commission Secretary
dba Avista Utilities
SCHEDULE 190
NATURAL GAS EFFICIENCY PROGRAMS
IDAHO
1. AVAILABILITY
The services described herein are available to qualifying residential, commercial, and
industrial, retail natural gas distribution customers of Avista Corporation for the purpose
of promoting the efficient use of natural gas. Customers receiving natural gas distribution
service provided under special contract and/or customers receiving natural gas services
not specified under Tariff Schedule 191 (Natural Gas Efficiency Rider Adjustment)are not
eligible for services contained in this schedule unless specifically stated in such contract
or other service agreement. The Company may provide partial funding for the installation
of natural gas efficiency measures and may provide other services to customers for the
purpose of identification and implementation of cost effective natural gas efficiency
measures as described in this schedule. Facilities-based services are available to owners
of facilities and also may be provided to tenants who have obtained appropriate owner
consent.
Assistance provided under this schedule is limited to end uses where natural gas is or
would be the energy source and to measures which increase the efficient use of natural
gas. Assistance may take the form of monetary incentives or non-monetary incentives, as
further defined within this tariff. The acquisition of resources is cost-effective as defined
by a Utility Cost Test (UCT) as a portfolio. Customer participation under this schedule
shall be based on eligibility requirements contained herein.
Effective December 31, 2026, natural gas efficiency programs, incentives and rebates
are available only for projects that meet the following conditions:
A. Site Specific Programs
1) The Company will honor all terms and conditions of contracts and
agreements that are fully executed prior to December 31, 2026. Such
contracts and agreements must be signed by both the Company and the
Customer.
2) Natural gas energy efficiency projects, proposed by the customer to Avista
prior to December 31, 2026, but without fully executed contracts, will be
honored by the Company under the following conditions:
i. The Company has already conducted an analysis of a proposed
natural gas energy efficiency measure. If the Company has not
already conducted an analysis of a proposed natural gas energy
efficiency measure, customers seeking incentive funding will
submit on overview of their proposed natural gas energy efficiency
project to the Company in writing or via email by December 31,
2026.
Issued June 12, 2026 Effective September 1, 2026
Issued by Avista Corporation
By Patrick Ehrbar, Director of Regulatory Affairs
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Seventh Revision Sheet 190A IDAHO PUBLIC UTILITIES COMMISSION
Canceling Approved Effective
I.P.U.C. No.27 Sixth Revision Sheet 190A September 24,2026 October 1,2026
Per ON 37181
AVISTA CORPORATION Commission Secretary
dba Avista Utilities
SCHEDULE 190 — continued
NATURAL GAS EFFICIENCY PROGRAMS - IDAHO
ii. All material documentation required for Avista to conduct an
analysis to determine energy efficiency savings and potential
incentive funding must be received by the Company by January 15,
2027. The Company has the sole discretion to determine if such
documentation is sufficient for analysis, and if the documentation is
not sufficient, will reject the project from incentive funding
consideration.
iii. Customers who wish to proceed with any natural gas energy
efficiency measure which has been evaluated by the Company
subject to the terms and conditions of this tariff must sign an energy
efficiency agreement with the Company by January 15, 2027.
iv. Customers must complete any contracted projects by January 15,
2028, unless otherwise agreed to in certain contracts executed
prior to December 31, 2026.
B. Residential and Non-Residential Prescriptive Rebate or Bid Programs
1) Customers seeking a rebate for qualified residential and nonresidential
equipment may submit rebate applications for equipment purchased on or
before December 31, 2026. Customers must send to Avista all required
rebate forms and other required documentation for qualifying projects
postmarked by January 15, 2027 to be eligible for payment; any requests
postmarked after January 15, 2027 will not be eligible for payment.
2) The business partner program will end on December 31. 2026. Customers
will no longer be able to schedule appointments nor receive bids from
contractors after that date.
C. Midstream Rebate Program
1) Participating distributors may submit invoices to the program implementer
for natural gas equipment purchased on or before December 31, 2026.
Final payment to the midstream vendor for any Idaho gas equipment with
a 2026 distributor invoice will be made on or before May 15, 2027.
D. Limited Income Program
1) All existing 2026 Community Action Partnership contracts with natural gas
incentives will be honored. The program will be suspended on December
31, 2026, and all invoices for work completed on or before December 31,
2026 shall be submitted to the Company by January 31, 2027.
E. Market Transformation
1) The Company will continue to fund programs or services supporting or
enhancing local, regional or national natural gas efficiency market
transformation efforts, as described within this tariff.
Issued June 12, 2026 Effective September 1, 2026
Issued by Avista Corporation
By Patrick Ehrbar, Director of Regulatory Affairs
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Fifth Revision Sheet 190B IDAHO PUBLIC UTILITIES COMMISSION
Canceling Approved Effective
I.P.U.C. No.27 Fourth Revision Sheet 190B September 24,2026 October 1,2026
Per ON 37181
AVISTA CORPORATION Commission Secretary
d/b/a Avista Utilities
SCHEDULE 190 — continued
NATURAL GAS EFFICIENCY PROGRAMS — IDAHO
2. ELIGIBLE CUSTOMER SEGMENTS
All customers in all customer segments to whom this tariff is available are eligible for
participation in natural gas efficiency programs developed in compliance with this tariff.
3. MEASURES
Only natural gas efficiency measures with verifiable energy savings are eligible for
assistance. Measure eligibility may not necessarily apply to all customer segments. Final
determination of applicable measures will be made by the Company
4. FUNDING AND NONMONETARY ASSISTANCE
4.1 Funding
The Company shall offer incentives for projects based upon the incremental capital
cost associated with the energy efficiency of the project. Energy savings are calculated
using the current energy rates.
The Company shall pay an incentive up to a maximum of the incremental measure
cost. The Company shall make adjustments to the percent of incremental cost paid to
attempt to obtain the greatest energy savings at the lowest cost.
Low income measures that have a Total Resource Cost (TRC) of 1.0 or higher are
incentivized at 100% of the project cost. For measures that have a TRC of less than 1,
the project is incentivized at an amount equal to the present value of avoided cost.
Incentives for efficiency measures within the following categories shall not exceed
100% of the project cost:
4.1.1 Energy efficiency programs delivered by community action agencies
contracted by the Company to serve Low Income or vulnerable
customer segments including agency administrative fees and health
and human safety measures;
4.1.2 Low-cost natural gas efficiency measures with demonstrable energy
savings (e.g. rooftop unit service);
4.1.3 Programs or services supporting or enhancing local, regional or
national natural gas efficiency market transformation efforts.
4.1.4 Prescriptive programs are guided by the typical application of that
measure in accordance with the previously defined incentive structure.
Incentive levels for these programs are based on market conditions at
the time of the program design and are not dependent on actual project
cost relative to incentive caps. Incentives shall not exceed project costs.
Issued June 12, 2026 Effective September 1, 2026
Issued by Avista Corporation
By Patrick Ehrbar, Director of Regulatory Affairs
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IDAHO PUBLIC UTILITIES COMMISSION
Approved Effective
I.P.U.C. No.27 Original Sheet 190C September 24,2026 October 1,2026
Per ON 37181
AVISTA CORPORATION Commission Secretary
d/b/a Avista Utilities
SCHEDULE 190 — continued
NATURAL GAS EFFICIENCY PROGRAMS — IDAHO
Avista Corporation will actively pursue natural gas efficiency opportunities that may
not fit within the prescribed services and simple pay-back periods described in this tariff.
In these circumstances the customer and Avista Corporation will enter into a site specific
services agreement.
5. BUDGET & REPORTING
The natural gas efficiency programs defined within this tariff will be funded by
surcharges levied within Schedule 191. The Company will manage these programs to
obtain resources that are cost-effective and achievable through utility intervention.
Schedule 191 will be reviewed annually and revised as necessary to provide adequate
funding for natural gas efficiency efforts.
6. GENERAL RULES AND PROVISIONS
Service under this schedule is subject to the General Rules and Provisions contained
in this tariff and is limited to facilities receiving natural gas service from the Company.
All installations and equipment must comply with all local code and permit
requirements applicable and be properly inspected, if required, by appropriate agencies.
The Company may establish specifications regarding any natural gas efficiency
measures and modifications to be effected under this schedule and may conduct
inspections to insure that such specifications are met.
Issued June 12, 2026 Effective September 1, 2026
Issued by Avista Corporation
By Patrick Ehrbar, Director of Regulatory Affairs
�J) -U4 -