DOCKETED  
Docket Number:  24-BSTD -01 
Project Title:  2025 Energy Code Rulemaking  
TN #:  255315 -1 
Document Title:  Notice of Proposed Action – 2025 Building Energy Efficiency 
Standards  
Description:  Notice that the California Energy Commission proposes to 
adopt changes to the Building Energy Efficiency Standards 
(California Code of Regulations, Title 24, Part 1, Chapter 10, 
and Part 6).  
Filer:  Javier Perez  
Organization:  California Energy Commission  
Submitt er Role:  Commission Staff   
Submission Date:  3/28/2024 12:28:36 PM  
Docketed Date:  3/28/2024  
 STATE OF CALIFORNIA — NATURAL RESOURCES AGENCY  Gavin Newsom, Governor  
CALIFORNIA ENERGY COMMISSION  
715 P Street
Sacramento, California 95814
energy.ca.gov  
CE
C-057 (Revised 1/21) 
NOTICE OF PROPOSED ACTION  
T
O THE CALIFORNIA BUILDING ENERGY EFFICIENCY STANDARDS  
2
025 CALIFORNIA ADMINISTRATIVE CODE  
2025 BUILDING ENERGY EFFICIENCY STANDARDS  
CALIFORNIA CODE OF REGULATIONS, TITLE 24,  
PART 1, CHAPTER 10,  and PART 6  
(2025 CALIFORNIA ENERGY CODE)  
D
ocket No. 24-BSTD-01 
N
otice Published on March 29, 2024  
I
NTRODUCTION  
Notice is hereby given that the California Energy Commission (CEC) proposes to adopt changes to 
the Building Energy Efficiency Standards contained in the California Code of Regulations (CCR), Title 24, Part 6 (also known as the California Energy Code) and associated administrative regulations in Title 24, Part 1, Chapter 10, after considering all recommendations, comments, and objections regarding the proposed action. A description of the proposed standards is provided in the Informative Digest below.  
P
UBLIC HEARING AND ADOPTION BY COMMISSION  
The CEC will hold a public hearing for the purpose of hearing comments on the proposed standards at the date and time listed below. Interested persons, or their authorized representative, may present oral and written statements, arguments, or contentions relevant to the proposed standards at the public hearing.  
P
ublic Hearing and Proposed Adoption Date  
August 14 , 2024 
10:00 a.m. (Pacific Time)  
RE
MOTE ATTENDANCE  
The public hearing may be accessed by clicking the Zoom link below or visiting Zoom at 
https://join.zoom.us and entering the ID and password for the workshop listed below. If you 
experience difficulties joining, you may contact Zoom at (888) 799- 9666 ext. 2, or the Office of the 
Public Advisor, Energy Equity, and Tribal Affairs at publicadvisor@energy.ca.gov or by phone at 
(916) 957- 7910.
Link: https://zoom.us/  
Meeting ID: 938 6923 0237  
Passcode: mtg@10am  
 
 To participate by telephone dial (213) 338- 8477 or 1- 888-475-4499 (toll free). When prompted, enter 
the Webinar ID and password listed above. To comment or ask a question over the telephone, dial *9 to “raise your hand” and *6 to mute/unmute your phone line.  
 PUBLIC ADVISOR  
The CEC’s Office of the Public Advisor, Energy Equity, and Tribal Affairs provides the public assistance in participating in CEC proceedings. For information on participation or to request interpreting services or reasonable accommodations, reach out via email at publicadvisor@energy.ca.gov , by phone at (916) 957- 7910. Requests for interpreting services and 
reasonable accommodations should be made at least five days in advance. The CEC will work diligently to accommodate all requests.  
 Zoom: If you experience difficulties with the Zoom platform, please contact the Public Advisor’s office via email or phone.  
 MEDIA INQUIRIES  
Direct media inquiries to the Media and Public Communications Office to (916) 654- 4989 or 
mediaoffice@energy.ca.gov .  
 WRITTEN PUBLIC COMMENT PERIOD  
The written public comment period for the 2025 Building Energy Efficiency Standards will be held from March 29, 2024, through May 13, 2024 . Any interested person, or their authorized 
representative, may submit written comments to the CEC for consideration on or prior to May 13, 2024. The CEC appreciates receiving written comments at the earliest possible date. Comments submitted outside this comment period are considered untimely. The CEC may, but is not required to, respond to untimely comments.  
 The CEC encourages use of its electronic commenting system. Visit the e- commenting page at 
https://www.energy.ca.gov/programs -and-topics/programs/building- energy -efficiency -standards/2025-
building- energy -efficiency , which links to the comment page for this docket. Enter your contact 
information and a comment title describing the subject of your comment(s). Comments may be included in the “Comment Text” box or attached as a downloadable, searchable document consistent with California Code of Regulations, Title 20, Section, 1208.1. The maximum files size allowed is 10 MB.  
 Written comments may also be submitted by email. Include docket number 24- BSTD -01 and “2025 
Energy Code” in the subject line and email to docket@energy.ca.gov .  
 A paper copy may be sent to:  
  California Energy Commission 
Docket Unit  
Docket No.24- BSTD -01 
715 P Street, MS -4 
Sacramento, CA 95814 
 
Written and oral comments, attachments, and associated contact information (including address, 
phone number, and email address) will become part of the public record of this proceeding with access available via any internet search engine.  
 To ensure you receive notice of any changes to the proposed regulatory changes in this proceeding, please follow the instructions provided at the end of this notice to join the proceeding email subscriber list or provide a valid email or mailing address wi th your comments.  
 
POST -HEARING MODIFICATIONS TO THE TEXT OF THE REGULATIONS  
 Pursuant to Government Code Section 11346.8, following the written public comment period and the 
public hearing, the CEC may adopt the proposed building standards substantially as proposed in this notice or with modifications that are sufficiently related to the original proposed text and notice of proposed changes. If modifications are made, the full text of the proposed modifications, clearly indicated, will be made available to the public for at least 15 days prior to the date on which CEC adopts, amends, or repeals the regulation(s). The CEC will accept written comments on the modified building standards during the 15- day period.  
 AUTHORITY AND REFERENCE  The CEC proposes to adopt the regulations under the authority granted by Public Resources Code Sections 25213, 25218, 25218.5, 25402, 25402.1, and 25605.  
 The CEC proposes to implement, interpret, or make specific Public Resources Code Sections 21080.4, 21153, 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, 25605, 25910, 25942, and 25943, and Health and Safety Code Sections 18930, 18934, and 18935.   INFORMATIVE DIGEST  Summary of Existing Laws, Regulations and Effect  
The Warren- Alquist Act (California Pub lic Resources  Code Sections 25001 et seq.) establishes the 
CEC as California’s primary energy policy and planning agency. Public Resource Code Sections 25213, 25402, 25402.1, 25402.4, 25402.5, 25402.8, 25910, 25942, and 25943 mandate and/or authorize that the CEC adopt  rules and regulations, as necessary, to reduce the inefficient 
consumption of energy and water in newly constructed buildings and certain additions and alterations to existing buildings.  
  
One of the ways the CEC satisfies this requirement is through the California Energy Code (California Code of Regulations, Title 24, Part 6) found in the California Building Standards Code, which are 
adopted pursuant to Health and Safety Code Sections 18930, 18934, and 18935 and, where 
applicable, the California Environmental Quality Act, California Public Resources Code Sections 
21000 et seq . The Energy Code includes all the energy efficiency requirements applicable to newly 
constructed buildings and additi ons and alterations to existing buildings. As a portion of the California 
Building Code (Title 24), the Energy Code (Title 24,  Part 6) follows the same three- year update cycle.  The CEC is initiating its next triennial rulemaking proceeding for updating the Energy Code, and the 
CEC proposes to adopt amendments for publication in 2024 with an effective date of January 1, 2026.   
 The proposed amendments to the 2025 Energy Code would:  
 
• Introduce prescriptive heat pump requirements for select nonresidential existing building types.  
• Update prescriptive heat pump requirements, and associated performance baselines, for newly 
constructed single- family, multifamily, and select nonresidential building types.  
• Update solar  photovoltaic system standards for residential, nonresidential and hotel and motel 
buildings.  
• Update energy storage standards for high- rise residential, nonresidential, and hotel and motel 
buildings.  
• Increase envelope efficiency standards for residential and nonresidential buildings.  
• Increase space conditioning system efficiency and control standards for residential and nonresidential buildings.  
• Improve indoor air quality requirements for multifamily buildings by requiring balanced or supply -only ventilation systems and compartmentalization leakage testing, as well as a 
prescriptive standard for energy/heat recovery ventilation systems with a faul t indicatory 
display.  
• Introduce prescriptive heat pump requirements for individual domestic water heating systems  
serving individual dwelling units  in low rise multifamily buildings .  
• Establish electric -ready requirements for multifamily domestic water heating systems.  
• Simplify standards for multifamily buildings.  
• Introduce options for improving efficiency of pool and spa water heating systems.  
• Increase daylighting control requirements for nonresidential buildings.  
• Increase efficiency standards for laboratories.  
• Increase efficiency requirements for controlled environment horticulture buildings.  
• Increase efficiency requirements for nonresidential refrigeration systems.  
• Establish industrial pipe insulation requirements.  
• Establish electric -ready requirements for commercial kitchens.  
• Relocate portions of the Alternative Calculation Method Approval Manual pertaining to the 
application, approval, updates, expiration, and decertification of third- party compliance 
software to Title 24, Part 1.  
• Relocate field verification and diagnostic testing requirements from Title 20 to Title 24, Part 1.  
• Make general improvements to the clarity and consistency of existing provisions.  
 
These amendments are significant to the State of California in that they support State clean energy goals, policies, and legislation. These amendments will increase the deployment and grid benefits of on-site renewable energy generation, increase flexibili ty of energy demand, reduce carbon emissions 
from new buildings (building decarbonization), reduce growth in energy demand, and ensure that California buildings are as energy efficient as possible while also being technically feasible and cost -
effective.  
  Comparable Federal Statute or Regulations  
The CEC has determined that there are no existing comparable federal regulations or statutes.  
 
Policy Statement Overview  
The Energy Code helps create long- term economic growth and stability by increasing the disposable 
income of Californians and California businesses in the longer term.  The regulations will increase 
energy efficiency savings in the state by carrying out the CEC’s statutory mandate to provide energy efficiency and conservation standards for newly constructed buildings and certain alterations and additions to existing buildings. By saving large amounts of energy, the standards will make a major contribution in meeting the state’s goals for reductions in greenhouse gas emissions.  
 The CEC estimates  that the implementation of the 2025 Energy Code will reduce anticipated 
statewide electricity  demand . This will, in turn, result in a net reduction in the emissions of 
greenhouse gases, nitrous oxide, sulfur oxides, carbon monoxide, and particulate matter attributable 
to electricity generation and on- site combustion .  Improved air quality as a result of reduced 
emissions will result in health benefits to Californians and help mitigate costs related to health and 
other issues associated wit h climate change . The reduction in statewide electricity demand will also 
marginally decrease water consumption in the electricity generation sector.  
 
EVALUATION OF INCONSISTENCY OR INCOMPATIBILITY WITH EXISTING STATE 
REGULATIONS  
The CEC has conducted an evaluation for other state regulations in this area and has determined that the proposed standards are neither inconsistent nor incompatible with existing state regulations.  
 OTHER MATTERS PRESCRIBED BY STATUTE APPLICABLE TO THE AGENCY OR TO ANY 
SPECIFIC REGULATION OR CLASS OF REGULATIONS  
None  
 MANDATE ON LOCAL AGENCIES OR SCHOOL DISTRICTS  
The CEC has determined that the proposed regulatory action would not impose a new mandate on local agencies or school districts.  
 ESTIMATE OF COST OR SAVINGS  
The CEC has prepared an estimate in accordance with instructions adopted by Department of Finance, of cost or savings to any state agency, local agency, or school district . 
 
A. Cost or savings to any state agency: Yes. Buildings owned and occupied by state agencies are required to comply with the standards.  
 B. Cost to any local agency required to be reimbursed under Part 7 (commencing with 
Section 17500) of Division 4:  Buildings owned or operated by local agencies are required to 
comply with the standards. However, costs of complying with the standards are not required to 
be reimbursed.  
 C. Cost to any school district required to be reimbursed under Part 7 (commencing with 
Section 17500) of Division 4:  School buildings are covered by the standards, and the 
administrative regulations of the Division of State Architect require public school buildings to 
comply with the standards. However, costs of complying with the standards are not required to be reimbursed.   
D. Other nondiscretionary cost or savings imposed on local agencies: None.  
 E. Cost or savings in federal funding to the state:  While the CEC receives federal State 
Energy Program funding for the building standards program, the updates proposed to the standards do not alter or affect the state’s ongoing participation in federal State Energy Program.  
 INITIAL DETERMINIATION OF NO SIGNIFICANT STATEWIDE ADVERSE ECONOMIC IMPACT ON BUSINESSES, INCLUDING ABILITY OF CALIFORNIA BUSINESSES TO COMPETE WITH BUSINESSES IN OTHER STATES  
 The CEC has made an initial determination that the proposed regulations are unlikely to have a 
statewide adverse economic impact directly affecting business, including the ability of California businesses to compete with businesses in other states. Despite minor competitive impacts to 
California businesses in the short term, the long- term benefits of the proposed regulations will not 
disadvantage California businesses from competing with businesses in other states.  
 
On the contrary, California's Energy Code is part of the California Building Standards Code and 
therefore, impact nearly all newly constructed buildings, as well as to specific additions and alterations to nearly all existing buildings. Therefore, the Ener gy Code may eventually impact all 
business in the state that own buildings. While there are initial up- front costs imposed by the Energy 
Code, there are significantly more lifetime savings to residents and businesses across the state who will experience lo wer energy costs and lower overall costs of ownership.  
 
There are long- term savings that typically more than compensate for initial upfront costs by a 
significantly positive ratio. Past changes to the Energy Code continue to generate benefits. More 
simply, the Energy Code helps create long- term economic growth and stability by increasing the 
disposable income of Californians and California businesses in the longer term. These long- term 
benefits far outweigh the initial upfront costs and, therefore, California businesses are not disadvantaged in competing with businesses from other states by these regulations. Since the 1970s, California has maintained a deep history of progressive environmental and energy regulations that also save consumers money.  Additional facts, data, and evidence supporting this initial determination 
are included in the CEC’s Economic and Fiscal Analysis (STD. 399) and in the rulemaking docket .  
 DECLARATION OF EVIDENCE  
The basis for the CEC’s findings on economic impacts is that the standards are cost -effective, and 
therefore will have a beneficial economic impact on the owners and occupants of buildings built to comply with the standards. Evidence for the cost -effective ness of the standards requirements is 
contained in the formal rulemaking docket.  
 DOCUMENTS INCORPORATED BY REFERENCE  
The existing Energy Code incorporates a number of industry test standards by reference. The amendments proposed for the 2025 Energy Code include updates to these standards as needed to maintain currency. The following documents are being incorporated by reference into the Energy Code:  
   AIR-CONDITIONING, HEATING AND REFRIGERATION INSTITUTE  
AHRI Standard 210/240 -  2023 (2020) Performance Rating of Unitary Air -Conditioning & Air -Source 
Heat Pump Equipment 2023  
AHRI Standard 340/360 -2022 (1- P) Performance Rating of Commercial and Industrial Unitary Air -
Conditioning and Heat Pump Equipment 2022  
AHRI Standard 420- 2023 (I -P) Performance Rating of Forced- circulation Free- delivery Unit Coolers 
2023  
ANSI/AHRI Standard 550/590- 2023 (I -P) 
Performance Rating of Water -Chilling Packages and Heat Pump Water -heating Packages Using the 
Vapor Compression Cycle 2023  
AHRI Standard 560- 2023 (I -P) Performance Rating of Water -cooled Lithium Bromide Absorption 
Water -chilling and Water -heating Packages 2023  
AHRI Standard 1060- 2023 (I -P) Performance Rating of Air -to-Air Exchangers for Energy Recovery 
Ventilation Equipment 2023  
AHRI Standard 1240- 2017 (R2023) (I -P) Performance Rating of Active Chilled Beams 2017 
AHRI Standard 1360- 2022 (I -P) Performance Rating of Computer and Data Processing Room Air 
Conditioners 2022  
  
AIR-CONDITIONING CONTRACTORS OF AMERICA  
ANSI/ACCA 2 Manual S - 2023 2023  
Manual S - Residential Equipment Selection, Third Edition 2023  
  
AAMA/WDMA/CSA  
AAMA/WDMA/CSA 101/I.S.2/A440:22 North American Fenestration Standard/Specification for 
Windows, Doors, and Skylights 2023  
  
AMERICAN CONFERENCE OF GOVERNMENTAL INDUSTRIAL HYGENISTS  
2023 TLVs and BEIs Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices 2023  
  
AMERICAN NATIONAL STANDARDS INSTITUTE  
ANSI/AMCA Standard 220- 21 Laboratory Methods of Testing Air Curtain Units for Aerodynamic 
Performance Rating 2021  
ANSI/ASSP Z9.5 -2022 Laboratory Ventilation 2022  
ANSI/NEMA WD 6 -2021 Wiring Devices - Dimensional Specifications 2021  
  
AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR- CONDITIONING ENGINEERS 
(NATIONAL PUBLICATIONS)  
ASHRAE GUIDELINE 36 -2021 High- Performance Sequences of Operation for HVAC Systems 2021  
ANSI/ASHRAE Standard 55 -2023 Thermal Environment Conditions for Human Occupancy 2023  
ANSI/ASHRAE Standard 62.1 -2022 Ventilation and Acceptable Indoor Air Quality 2022  
ANSI/ASHRAE Standard 62.2 -2022 Ventilation and Acceptable Indoor Air Quality in Residential 
Buildings 2022  
ANSI/ASHRAE 84 -2020 Method of Testing Air -to-Air Heat/Energy Exchanger 2020  
ANSI -ASHRAE 90.1 -2022 Energy Standard for Buildings Except Low -Rise Residential Buildings 2022  
ANSI/ASHRAE Standard 154 -2022 Ventilation f or Commercial Cooking Operations 2022  
  
ASHRAE Handbooks  
2023 ASHRAE Handbook -  HVAC Applications (I -P) 2023  2020 ASHRAE Handbook -  HVAC Systems and Equipment (I -P) 2020 
2021 ASHRAE Handbook -  Fundamentals (I -P) Fundamentals (I -P) 2021  
  
AMERICAN SOCIETY OF MECHANICAL ENGINEERS  
ASME A17.1 -2019/CSA B44:22 Safety Code for Elevators and Escalators 2022  
  
AMERICAN SOCIETY FOR TESTING AND MATERIALS / ASTM INTERNATIONAL  
ASTM C55 -22 Standard Specifications for Concrete Building Brick 2022  
ASTM C335/C335M -23 Standard Test Method for Steady -State Heat Transfer Properties of 
Horizontal Pipe Insulation 2023  
ASTM C518 -21 Standard Test Method for Steady -State Thermal Transmission Properties by Means 
of the Heat Flow Meter Apparatus 2021  
ASTM C731 -15(2022) Standard Test Method for Extrudability, After Package Aging, of Latex 
Sealants 2022  
ASTM C732 -22 Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants 
2022  
ASTM C836/C836M -18(2022) Standard Specification for High Solids Content, Cold Liquid- Applied 
Elastomeric Waterproofing Membrane for Use with Separate Wearing Course 2022  
ASTM C1167 -22 Standard Specification for Clay Roof Tiles 2022  
ASTM C1492 -22 Standard Specification for Concrete Roof Tile 2022  
ASTM C1549 -16(2022) Standard Test Method for Determination of Solar Reflectance Near Ambient 
Temperature Using a Portable Solar Reflectometer 2022  
ASTM C1583/C1583M -20 Standard Test Method for Tensile Strength of Concrete Surfaces and the 
Bond Strength or Tensile Strength of Concrete Repair and Overlay Materials by Direct Tension (Pull -
off Method)  
ASTM D448 -12(2022) Standard Classification for Sizes of Aggregate for Road and Bridge 
Construction 2022  
ASTM D522/D522M -17(2022) Standard Test Methods for Mandrel Bend Test of Attached Organic 
Coatings 2022  
ASTM D822/D822M -13(2018) Standard Practice for Filtered Open- Flame Carbon- Arc Exposures of 
Paint and Related Coatings  
ASTM D2202 -00(2023) Standard Test Method for Slump of Sealants 2023  
ASTM D3805/D3805M -16(2023) Standard Guide for Application of Aluminum -Pigmented Asphalt 
Roof Coatings 2023  
ASTM D5870 -22 Standard Practice for Calculating Property Retention Index of Plastics (2016) 2022  
ASTM D6694/D6694M -15(2023) Standard Specification for Liquid-  Applied Silicone Coating Used in 
Spray Polyurethane Foam Roofing 2023  
ASTM E96/E96M -22ae1 Standard Test Methods for Water Vapor Transmission of Materials 2022  
ASTM E1175 -87(2022) Standard Test Method for Determining Solar or Photopic Reflectance, 
Transmittance, and Absorptance of Materials Using a Large Diameter Integrating Sphere 2022  
ASTM E1677 -23 Standard Specification for Air Barrier (AB) Material or Assemblies for Low -Rise 
Framed Building Walls 2023  
ASTM E1680 -16(2022) Standard Test Method for Rate of Air Leakage through Exterior Metal Roof 
Panel Systems 2022  
ASTM E1918 -21 Standard Test Method for Measuring Solar Reflectance of Horizontal and Low -
Sloped Surfaces in the Field 2021  
ASTM E2178 -21a Standard Test Method for Determining Air Leakage Rate and Calculation of Air 
Permeance of Building Materials 2021  
ASTM E2357 -23a Standard Test Method for Determining Air Leakage of Air Barrier Assemblies 2023    
CALIFORNIA BUILDING CODE  
2025 California Building Code 2025  
2025 California Electrical Code 2025  
2025 California Fire Code 2025  
2025 California Historical Building Code 2025 
2025 California Mechanical Code 2025  
2025 California Plumbing Code 2025  
  
CALIFORNIA ENERGY COMMISSION  
Appliance Efficiency Regulations 2025  
Alternative Calculation Method (ACM) Manual 2025  
  
CALIFORNIA DEPARTMENT OF CONSUMER AFFAIRS  
Standards for Insulating Material  
  
COOL ROOF RATING COUNCIL  
CRRC- 1 (2023) Product Rating Program Manual 2023  
  
ILLUMINATING ENGINEERING SOCIETY  
IES LM -51-20 Approved Method: Electrical and Photometric Measurement of High Intensity 
Discharge Lamps 2020   
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ISO 7574 -4: 1985 Statistical methods for determining and verifying stated noise emission values of 
machinery and equipment 1985  
ANSI/ASA S12.55 -2012/ISO 3745:2012 Acoustics -  determination of sound power levels and sound 
energy levels of noise sources using sound pressure -  precision methods for anechoic rooms and 
hemi -anechoic rooms 2012  
  
INTERNATIONAL ASSOCIATION OF PLUMBING AND MECHANICAL OFFICIALS  
California Mechanical Code  
  
INTERNATIONAL CODE COUNCIL  
California Building Code (2025) 2025  
  
INTERNATIONAL WINDOW FILM ASSOCIATION  
Architectural Visual Inspection Standard Window Film (reindorsed 2018) 2018  
  
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION  
NEMA LSD 57 -2023 Polyurethane Foam Application: Lighting Equipment 2023  
  
NATIONAL FENESTRATION RATING COUNCIL  
ANSI/NFRC 100 -2023 Procedure for Determining Fenestration Product U -factors 2023  
ANSI/NFRC 200 -2023 Procedure for Determining Fenestration Product Solar Heat Gain Coefficients 
and Visible Transmittance at Normal Incidence 2023  
ANSI/NFRC 202 -2023 Procedure for Determining Translucent Fenestration Product Visible 
Transmittance at Normal Incidence 2023  ANSI/NFRC 203 -2020 (R2023) Procedure for Determining Visible Transmittance of Tubular 
Daylighting Devices 2020  
ANSI/NFRC 400 -2023 Procedure for Determining Fenestration Product Air Leakage 2023  
  
NSF INTERNATIONAL (FORMERLY NATIONAL SANITATION FOUNDATION)  
NSF/ANSI/CAN 50 -2023e Equipment and Chemicals for Swimming Pools, Spas, Hot Tubs, and 
Other Recreational Water Facilities 2023  
  
SHEET METAL AND AIR- CONDITIONING CONTRACTORS’ NATIONAL ASSOCIATION 
ANSI/SMACNA 006 -2020 HVAC Duct Construction Standards -  Metal and Flexible 2020  
  
UNDERWRITERS LABORATORIES / UL  
UL 1598- 2021 Standard for Luminaires 2021  
UL 1741- 2021 Standard for Inverters, Converters, Controllers and Interconnection System Equipment 
for Use with Distributed Energy Resources 2021  
UL 1973- 2022 Standard for Batteries for Use in Stationary, Vehicle Auxiliary Power and Light Electric 
Rail (LER) Applications 2022  
UL 2108- 2015 (R2023) Low Voltage Lighting Systems 2015  
UL 9540- 2023 Standard for Energy Storage Systems and Equipment 2023  
 
Upon request, all documents are available for review at the CEC located at 715 P Street, Sacramento, California 95814.  
  FINDING OF NECESSITY FOR THE PUBLIC'S HEALTH, SAFETY, OR WELFARE BUSINESS 
REPORT:  
The proposed regulations of Part 1,  Chapter 10, sections 10- 103.3 would impose new reporting 
requirements on Energy Code Compliance (ECC) providers and ECC independent raters and rater companies.   
 ECC- Provider:  
1. Reporting to the Commission Compliance Document Repository (CCDR)  
The proposed regulations will require the ECC -Providers to transmit compliance 
documentation registered in its data registry no less than once per calendar year to the 
Commission Compliance Document Repository (CCDR). This reporting requirement will reliev e 
existing annual reporting requirements concerning these registered compliance documents.  
 
2. Quality Assurance Reporting:  
a. Quarterly Reporting. The proposed regulations will require that the ECC -Provider report 
each quarter to the CEC a summary of all failed quality assurance audits.  
b. Annual Reporting. The proposed regulations will require that the ECC -Provider report 
each year to the CEC.  
3. Response to data requests from the CEC: At any time, the Executive Director may request 
access to or a digital copy of one or more registered compliance documents, associated Compliance Registration Packages, and quality assurance records that an ECC -Provi der is 
required to maintain.  4. Immediate Reporting of Disciplinary Actions. The ECC -Provider will be required to provide 
written notification of any ECC -Rater or ECC -Rater Company decertification to the 
Commission within 24 hours of decertification.  
5. Summary of ECC -Rater Company and Independent Rater annual reports (see below). This 
summary will include an aggregation of the total and average costs of services for each type of 
field verifications and diagnostic tests reported by all ECC -Rater Companies  and independent 
ECC- Raters without any associated identification.  
ECC- Rater Company and Independent Rater:  
Under the proposed requirements, beginning in June of 2027, the ECC -Provider will submit to 
the CEC a summary of the annual reports from each ECC -Rater Companies and Independent 
Raters under its certification. The ECC -Rater Companies and Independent Raters must submit 
a detailed report annually to the ECC -Provider. These annual reports must include the ECC -
Rater Company or independent Rater’s continued licensure compliance, employed ECC -Rater 
certificate status, field verification and diagnostic testing activities, and averag e cost of 
services provided.  
 
It is necessary for the health, safety, or welfare of the people of the state, that these regulations, which require a report, apply to businesses.  
 COST IMPACT ON REPRESENTATIVE PRIVATE PERSON OR BUSINESS  
The CEC has determined that there may be additional  incremental costs to an individual homeowner 
imposed by the Energy Code, however, there are long- term savings that typically repay those costs 
by a significantly positive ratio making the initial costs for a new single family home buyer to be   statistica lly insignificant.  
 California's Energy Code is part of the California Building Standards Code and therefore impacts nearly all newly constructed buildings, as well as to certain additions and alterations to existing buildings. As a result, the Energy Code may eventually impact all businesses in the state that own buildings because California’s Energy Code applies to buildings built in the state of California. While the increased energy efficiency measures in California's buildings may have short term initial costs, there are long-term benefits from reduced utility costs. For individuals this will result in increased 
disposable income and for businesses lower costs and potentially additional profit. The proposed standards are cost -effective over the life of the building.  
 In addition, the CEC estimates that the implementation of the proposed standards will reduce anticipated increases in statewide annual electricity demand and natural gas consumption. This will, in turn, result in a net reduction in the emissions of greenho use gases, nitrous oxide, sulfur oxides, 
carbon monoxide, and particulate matter attributable to electricity generation and on- site combustion 
(compared to the current Energy Code requirements). Reduced air pollution and reductions in greenhouse gases will  result in health benefits to Californians and help mitigate health and other 
costs associated with climate change. The reduction in statewide electricity demand will also marginally decrease water consumption in the electricity generation sector.  
 SMALL BUSINESS  
The proposed standards will affect small businesses. The Energy Code does not differentiate between a small business and a typical business but rather impact construction that may occur in nearly all public and private buildings in California.   
ASSESSMENT OF EFFECT OF REGULATIONS UPON JOBS AND BUSINESS EXPANSION, ELIMINATION OR CREATION  The CEC has assessed whether and to what extent this proposal will affect the following:  
 A. The creation or elimination of jobs within the State of California  
The CEC has made the initial determination that the proposed regulations for the 2025 Energy Code 
will result in an estimated 6,215 jobs created and 18 jobs eliminated. Jobs created and eliminated 
estimates were developed with support from Evergreen Econom ics using IMPLAN modeling software.  
The IMPLAN model provides a relatively simple representation of the California economy’ however, it is important to understand that the IMPLAN model simplifies the extremely complex actions and interactions of individual, businesses, and other organizations as they respond to changes in energy 
efficiency codes. The estimated jobs eliminated are the result of a proposed measure that will 
increase central water heating pipe efficiency requirements in newly constructed mult ifamily buildings, 
which will result in increased costs for builders. This measure results in incremental costs and thereby decreases discretionary income. Therefore, the CEC concludes that the proposal may result in both jobs created and eliminated in Cal ifornia.  
 
B. The creation of new businesses or the elimination of existing businesses within the State of California.  
California's Energy Code is part of the California Building Standards Code and therefore impacts 
nearly all newly constructed buildings, as well as specific additions and alterations to existing buildings. As a result, the 2025 Energy Code is expected to eventually impact all businesses in the state that own buildings. While there are initial up- front costs imposed by the Energy Code, there are 
significantly more lifetime savings to residents and businesses across the state who will experience lower energy costs and lower overall costs of ownership. The Energy Code helps create long- term 
economic growth and stability by increasing the disposable income of Californians and California businesses in the longer term making it possible that new businesses may be created to provide compliance services and to supply energy efficient products. Therefore, the CEC concludes that the proposal may create some additional business and is unlikely to eliminate existing businesses within 
the state of California. Given the uncertainty, and the many unknown variables in making these 
projections, the CEC is conservatively assuming there will be no additional businesses created.  
 
C. The expansion of businesses currently doing business within the State of California.  
California businesses producing energy efficient products and technology that meet or exceed the 
proposed Standards are likely to expand their sales of those products and technologies due to the implementation of these proposed Standards. Therefore, the CE C concludes that businesses 
currently doing business in California to provide energy -efficient products and services may be 
expanded.    
 D. The benefits of the regulation to the health and welfare of California residents, worker safety, and the state’s environment.  
Beyond the monetary benefits, the CEC estimates that the implementation of the 2025 Energy Code 
updates will reduce anticipated increases in statewide annual electricity demand. This will, in turn, result in a net reduction in the emissions of greenhouse gases, nitrous oxide, sulfur oxides, carbon monoxide, and particulate matter attributable to electricity generation and on- site combustion. 
Improved air quality as a result of reduced emissions will result in health benefits to Californians and 
help mitigate costs related to health and other issues associated with climate change.  The reduction 
in statewide electricity demand will also marginally decrease water consumption in the electricity 
generation sector.  
 The proposed regulations will not adversely affect the health and welfare of California residents, 
worker safety, or the state’s environment.  
 ESTIMATED COST OF COMPLIANCE OF STANDARDS THAT WOULD IMPACT HOUSING  
The proposed regulations are required by statute (Public Resources Code § 25402 (b)(3)) to be cost -
effective when amortized over the economic life of the structure. Increasing energy efficiency in 
California’s buildings through the Energy Code often incurs  short term initial costs, largely imposed on 
California homebuilders and commercial building developers, but results in long- term benefits to large 
amounts of residents and businesses across the state. For residents and businesses alike, advancing the state’s Energy Code results in reduced energy costs, lower overall expenses for renters, lower costs of ownership and thereby lower risks of default for borrowers.  
There is significant evidence that the cost increases associated with complying with the Energy Code have no statistically significant impact on median single- family home sale prices.
5 Initial costs 
imposed on homebuilders and developers are included as initial costs in B1, but not considered significant enough to impact housing costs in the state. Currently, two identical homes in California – one that complies with the Energy Code that is currently in effect, and another that would comply with 
this proposed set of regulations – would have the same market value. Notable factors that are known 
to impact housing costs are neighborhood comparable homes (“comps”), location, home size, age, 
interest rates, and other economic indicators; the Energy Code does not impact these factors.  
 
CONSIDERATION OF ALTERNATIVES  
The CEC has determined that no reasonable alternative considered by the CEC or that has otherwise been identified and brought to the attention of the CEC would be more effective in carrying out the purpose for which the action is proposed, or would be as effective and less burdensome to affected private persons than the proposed action, or would be more cost -effective to affected private persons 
and equally effective in implementing the statutory policy or other provisions of law.  
 The CEC invites interested persons to present statements, arguments, or data concerning alternatives to the proposed standards at the scheduled hearing or during the written comment period.  
 AVAILABILITY OF RULEMAKING DOCUMENTS  The CEC maintains a website to facilitate public access to documents prepared and considered as part of this rulemaking proceeding. Documents prepared by the CEC for this rulemaking have been posted at 
https://www.energy.ca.gov/programs -and-topics/programs/building- energy -efficiency -
standards/2025- building -energy -efficiency  
 The CEC will have the entire rulemaking file available for inspection and copying throughout the rulemaking process at the address below. As of the date this notice is published in the Notice Register, the rulemaking file consists of this Notice, the Express Terms, the Initial Statement of Reasons (ISOR), the Economic and Fiscal Impact Statement (STD. 399), any documents relied upon, 
and any documents incorporated by reference. Copies may be obtained by contacting Corrine Fishman at the phone number below or accessed through the CEC website at 
https://www.energy.ca.gov/programs -and-topics/programs/building- energy -efficiency -standards/2025-
building- energy -efficiency  
 At the conclusion of the rulemaking, persons may obtain a copy of the Final Statement of Reasons (FSOR), once it has been prepared, by visiting the CEC’s website at 
https://www.energy.ca.gov/programs -and-topics/programs/building- energy -efficiency -standards/2025-
building- energy -efficiency .  
  CONTACT PERSON FOR PROCEDURAL AND ADMINISTRATIVE QUESTIONS  
Please direct general inquiries concerning aspects of the rulemaking process including requests for copies of the proposed text (Express Terms), the Initial Statement of Reasons (ISOR), any modified version of the regulations, the substance of the proposed regulations, or any other information upon 
which the rulemaking is based to:  
 
Corrine Fishman, MA  
Regulations Manager  
Efficiency Division  
corrine.fishman@energy.ca.gov
  
 PROPOSING STATE AGENCY CONTACT PERSON FOR SUBSTANTIVE AND/OR TECHNICAL QUESTIONS ON THE PROPOSED CHANGES TO BUILDING STANDARDS  
Specific questions regarding the substantive and/or technical aspects of the proposed changes to the building standards should be addressed to: 
 
Payam Bozorgchami, PE  
Senior Civil Engineer  
Building Standards  Branch 
Payam.bozorgchami@energy.ca.gov
 
  INSTRUCTIONS FOR RECEIVING NOTICES AND DOCUMENTS IN THIS PROCEEDING  To stay informed about this project and receive documents and notices of upcoming workshops and 
hearings as they are filed, please subscribe to the subscription list, which can be accessed at 
https://www.energy.ca.gov/subscriptions . 
  
The subscription list sends out email notifications and direct links when documents and notices are filed in the proceeding docket. If you are unable or do not wish to sign up for the subscription list but still would like to receive documents and notices,  please contact the contact person listed above in 
this notice .