{"id":7969,"date":"2026-10-26T15:13:56","date_gmt":"2026-10-26T19:13:56","guid":{"rendered":"https:\/\/cbhcc-cchcc.ca\/?page_id=7969"},"modified":"2026-10-26T15:13:58","modified_gmt":"2026-10-26T19:13:58","slug":"public-review-of-proposed-changes-to-the-2025-national-model-codes","status":"publish","type":"page","link":"https:\/\/cbhcc-cchcc.ca\/en\/public-review-of-proposed-changes-to-the-2025-national-model-codes\/","title":{"rendered":"Public review of proposed changes to the 2025 National Model Codes"},"content":{"rendered":"<p>This national public review runs from <strong>October 26 to December 21, 2026<\/strong>.<\/p>\n<p>The Canadian Board for Harmonized Construction Codes (CBHCC) invites code users, the Codes community, and the public to participate in the fall 2026 public review of proposed changes to the 2025 editions of the National Model Codes. The proposed changes included in this public review address the following topics:<\/p>\n<h2>National Building Code of Canada<\/h2>\n<ul>\n<li>Accessibility<\/li>\n<li>Building fire safety<\/li>\n<li>Conformity assessment<\/li>\n<li>Defined terms<\/li>\n<li>Energy efficiency for houses<\/li>\n<li>Environmental separation<\/li>\n<li>Fire alarm and detection systems<\/li>\n<li>Greenhouse gas emissions<\/li>\n<li>Heating, ventilating and air-conditioning systems<\/li>\n<li>Performance compliance<\/li>\n<li>Piping and duct insulation<\/li>\n<li>Radon and soil gas mitigation<\/li>\n<li>Structural design (Part 9)<\/li>\n<li>Updates to referenced documents<\/li>\n<\/ul>\n<h2>National Fire Code of Canada<\/h2>\n<ul>\n<li>Flammable and combustible liquids<\/li>\n<li>Hazardous processes and operations<\/li>\n<li>Piping and transfer systems<\/li>\n<li>Storage of combustible products and dangerous goods<\/li>\n<li>Updates to referenced documents<\/li>\n<\/ul>\n<h2>National Energy Code of Canada for Buildings<\/h2>\n<ul>\n<li>Conformity assessment<\/li>\n<li>Defined terms<\/li>\n<li>Service water heating<\/li>\n<li>Updates to referenced documents<\/li>\n<\/ul>\n<h2>National Plumbing Code of Canada<\/h2>\n<ul>\n<li>Conformity assessment<\/li>\n<li>Drainage systems<\/li>\n<li>Plumbing<\/li>\n<li>Potable water systems<\/li>\n<li>Updates to referenced documents<\/li>\n<\/ul>\n<p>See the <strong>summary of key proposed changes<\/strong> below for more details.<\/p>\n<p>The purpose of this public review is to:<\/p>\n<ul>\n<li>provide code users, the Codes community, and the public with a detailed look at proposed technical changes, and\n<li>seek comment on each proposed technical change as to whether it should be approved, altered or withdrawn.<\/ul>\n<p>The public review will close at <strong>11:59 pm PT on December 21, 2026, after which comments will no longer be accepted<\/strong>.<\/p>\n<p>The result of the public review process is a collection of comments on proposed code changes. The comments are sorted and analyzed by Codes Canada staff who are familiar with the development of the proposed changes, and who develop a draft resolution to each comment. The draft resolutions are validated by the responsible code development committees, which form the recommendations to the CBHCC.<\/p>\n<p>The recommendations could be one of the following:<\/p>\n<ul>\n<li>approve for publication,\n<li>revise for publication,\n<li>defer publication pending further development \u2013 subject to subsequent public review, or\n<li>withdraw proposed code change.<\/ul>\n<p>The CBHCC decides which changes will be published in the next edition of the National Model Codes based on the recommendations of the code development committees.<\/p>\n\n<section class=\"alert alert-success\">\r\n<h3>Steps for submitting comments on proposed changes<\/h3>\r\n<p><strong>Step 1<\/strong>: Read the <a href=\"\/en\/guidelines-for-comments\/\">guidelines<\/a> for writing comments.<br \/><strong>Step 2<\/strong>: Read the <a href=\"\/en\/instructions-for-submitting-a-comment\/\">instructions<\/a> for submitting comments.<br \/><strong>Step 3<\/strong>: Read the <a href=\"\/en\/public-review-fall-2026\/\">proposed changes<\/a>.<br \/><strong>Step 4<\/strong>: If you have a comment, click the \u201cSubmit a comment\u201d link located at the beginning of each proposed change, which will take you to the <a href=\"\/en\/comment-on-a-proposed-change-public-review\/\">online comment form<\/a>. Only comment forms that are submitted online will be accepted.<\/p>\r\n<p style=\"margin-top: -30px !important; padding: 15px !important;\">You may submit other related documents, such as reports, by email or mail.<\/p>\r\n<p style=\"margin-top: -30px !important; padding: 15px !important;\"><strong>Important:<\/strong> Submit one comment form per proposed change. If you are commenting on more than one proposed change, use a separate form for each one.<\/p>\r\n<p style=\"margin-top: -30px !important; padding: 15px !important;\">Thank you for contributing to the development of the National Model Codes.<\/p>\r\n<\/section>\n\n\n<p>Important links:<\/p>\n<ul>\n<li><a href=\"\/en\/frequently-asked-questions-about-public-review\/\">Frequently asked questions<\/a><\/li>\n<li><a href=\"\/en\/official-languages-notice\/\">Official languages notice<\/a><\/li>\n<\/ul>\n<style id=\"ea_dynamic_css7976\">#sp-ea-7976 .spcollapsing{height: 0; overflow: hidden; transition-property: height; transition-duration: 300ms;}#sp-ea-7976.sp-easy-accordion>.sp-ea-single.eap_inactive>.ea-header a {background-color: #bb0000 !important; color: #fff !important;}#sp-ea-7976.sp-easy-accordion>.sp-ea-single{ margin-bottom: 10px; border: 1px solid #e2e2e2; border-radius: 3px;}#sp-ea-7976.sp-easy-accordion>.sp-ea-single.ea-expand{ border-color: 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.eap-product-cart-button a.add_to_cart_button{position: relative;}<\/style><div id=\"sp-eap-accordion-section-7976\" class=\"sp-eap-container\"><div id=\"sp-ea-7976\" class=\"sp-ea-one sp-easy-accordion \" data-ex-icon=\"fa-caret-right\" data-col-icon=\"fa-caret-down\" data-ea-active=\"ea-click\" data-ea-mode=\"vertical\" data-ea-multi-column=\"\" data-ea-coll=\"\" data-keep-accordion=\"\" data-autoclose=\"\" data-preloader=\"\" data-scroll-active-item=\"\" data-offset-to-scroll=\"0\" data-autoplaytime=\"3000\" data-expand=\"\" data-post-id=\"7976\" data-accordion_mode=\"ea-all-close\">\t<div class=\"ea-card  sp-ea-single\"  data-accordion-id= \"0\">\n\n\t\t<h2 class=\"ea-header\">\n\t\t\t<a class=\"collapsed\" data-sptoggle=\"spcollapse\" rel=\"nofollow\" data-sptarget=\"#collapse79760\" href=\"#\" data-title=\"efaq-summary-of-key-proposed-changes\" aria-expanded=\"false\">\n\t\t\t\t<i class=\"ea-expand-icon fa fa-caret-down\"><\/i>  Summary of key proposed changes\t\t\t<\/a>\n\t\t<\/h2>\n\n\t\t<div class=\"sp-collapse spcollapse spcollapse\" id=\"collapse79760\" data-parent=\"#sp-ea-7976\">\n\t\t<div class=\"ea-body\"> \n<div class=\"ea-content-wrapper \"> \n\t<h3>National Building Code of Canada (NBC)<\/h3>\n<h4>Simplification of the framework for accessibility in buildings intended for public use (Part 3)<\/h4>\n<p>Simplifies the framework in NBC Subsection 3.8.3. to provide one set of minimum requirements for the design of Part 3 and Part 9 public buildings, and updates references to the latest (2023) edition of CSA\/ASC B651.<\/p>\n<h4>Active side-wall radon stack (Part 9)<\/h4>\n<p>Adds the option of an active side-wall radon stack as a means of meeting the minimum requirements for radon mitigation in dwelling units and home-type care occupancies that have a floor assembly in contact with the ground.<\/p>\n<h4>Roof load transfer to braced wall panels (Part 9)<\/h4>\n<p>Clarifies requirements regarding the transfer of loads between the roof structure and braced wall panels.<\/p>\n<h4>Energy modeling rules for heat pumps (Part 9)<\/h4>\n<p>Updates energy modeling rules for heat pumps for the reference house and Energy Performance Tier 1, and adds a percent heat loss reduction requirement for Tier 1.<\/p>\n<h4>Energy modeling software (Part 9)<\/h4>\n<p>Updates references to ANSI\/ASHRAE 140-2023, adds a new Article on the acceptance criteria for testing of energy modeling software, and harmonizes terminology.<\/p>\n<h4>Energy Performance Tier 3 of the prescriptive path (Part 9)<\/h4>\n<p>Provides simple energy-efficiency requirements for compliance with Tier 3 through the prescriptive path.<\/p>\n<h4>Minimum energy-efficiency performance level (Part 9)<\/h4>\n<p>Simplifies compliance path options and sets Energy Performance Tier 1 as the minimum energy-efficiency performance level.<\/p>\n<h4>Minimum thermal resistance value for duct insulation (Part 9)<\/h4>\n<p>Increases the minimum thermal resistance (RSI) value for duct insulation.<\/p>\n<h4>New references to standards (Parts 3, 5, 6 and 9)<\/h4>\n<p>Adds new references to the following standards:<\/p>\n<ul>\n<li>CAN\/ULC-S142:2016, \u201cStandard Method of Fire Test for Heat and Visible Smoke Release for Discrete Products\u201d (Part 3)<\/li>\n<li>ASTM C1278\/C1278M-24, \u201cStandard Specification for Fiber-Reinforced Gypsum Panel\u201d (Parts 5 and 9)<\/li>\n<li>CAN\/ULC 743.1:2020, \u201cStandard for Thermal Insulation \u2013 Low Pressure Applied Two Component Spray Polyurethane Foam, Part 1: Material Specification\u201d (Parts 5 and 9)<\/li>\n<li>CAN\/ULC 743.2:2021, \u201cStandard for Thermal Insulation \u2013 Low Pressure Applied Two Component Spray Polyurethane Foam, Part 2: Installation\u201d (Parts 5 and 9)<\/li>\n<li>CAN\/ULC 588:2024A, \u201cGas and Vapour Detectors and Sensors, Including Accessories\u201d (Parts 5, 6 and 9)<\/li>\n<li>ANSI\/AMCA 300-24, \u201cReverberation Room Methods of Sound Testing of Fans,\u201d and ANSI\/ASHRAE 51-25 (ANSI\/AMCA 210-25), \u201cLaboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating,\u201d to replace CAN\/CSA-C260-M, \u201cRating the Performance of Residential Mechanical Ventilating Equipment\u201d (Part 9)<\/li>\n<\/ul>\n<h3>National Fire Code of Canada (NFC)<\/h3>\n<h4>Classification of water-miscible liquid mixtures (Part 4)<\/h4>\n<p>Updates the test method for and subsequent fire hazard classification of water-miscible liquid mixtures, and adds classifications for four additional mixtures.<\/p>\n<h4>New references to standards (Parts 4 and 5)<\/h4>\n<p>Adds new references to the following standards:<\/p>\n<ul>\n<li>ANSI\/CAN\/UL\/ULC 1369:2020, \u201cStandard for Aboveground Piping for Flammable and Combustible Liquids\u201d (Part 4)<\/li>\n<li>ANSI\/CAN\/UL\/ULC 2152:2021, \u201cSpecial Purpose Nonmetallic Containers and Tanks for Specific Combustible or Noncombustible Liquids\u201d (Part 4)<\/li>\n<li>CAN\/CSA-B138.1-17\/CAN\/CSA-B138.2-17, \u201cPortable oil-burning equipment - Packaged equipment requirements\/Installation requirements\u201d (Part 5)<\/li>\n<\/ul>\n<h3>National Plumbing Code of Canada (NPC)<\/h3>\n<h4>IAPMO Water Demand Calculator (Part 2)<\/h4>\n<p>Adds the International Association of Plumbing and Mechanical Officials (IAPMO) Water Demand Calculator as an acceptable tool for the design of potable water systems.<\/p>\n<h4>Spacing of cleanouts in vertical drainage pipes (Part 2)<\/h4>\n<p>Introduces a requirement for the spacing of cleanouts in vertical stacks serving drainage systems, where provided.<\/p>\n<h4>New references to standards (Part 2)<\/h4>\n<p>Adds new references to the following standards:<\/p>\n<ul>\n<li>ANSI\/ISEA Z358.1-2014, \u201cAmerican National Standard for Emergency Eyewash and Shower Equipment\u201d<\/li>\n<li>ASME B16.51-2021, \u201cCopper and Copper Alloy Press-Connect Pressure Fittings\u201d<\/li>\n<li>ASTM F3226\/F3226M-19, \u201cStandard Specification for Metallic Press-Connect Fittings for Pipe and Tubing Systems\u201d<\/li>\n<li>CSA B45.8:23\/IAPMO Z403-2023, \u201cTerrazzo, concrete, composite stone, and natural stone plumbing fixtures,\u201d CSA B45.11:17\/IAPMO Z401-2017, \u201cGlass plumbing fixtures,\u201d and CSA B45.12:23\/IAPMO Z402-2023, \u201cAluminum and copper plumbing fixtures,\u201d to replace CAN\/CSA-B45 Series, \u201cPlumbing Fixtures\u201d<\/li>\n<li>IAPMO\/ANSI\/CAN Z1117-2022, \u201cStandard for Press Connections\u201d<\/li>\n<li>NSF\/ANSI\/CAN 372-2024, \u201cDrinking Water System Components \u2013 Lead Content\u201d<\/li>\n<\/ul>\n<h3>NBC, NFC and National Energy Code of Canada for Buildings (NECB)<\/h3>\n<h4>Conformity assessment (Part 1 of Division A and Part 2 of Division C)<\/h4>\n<p>Introduces provisions in Divisions A and C for the acceptance of Code conformity assessments issued by the Canadian Construction Materials Centre.<\/p>\n<h3>All National Model Codes<\/h3>\n<h4>Updates to referenced documents<\/h4>\n<p><a href=\"\/en\/updates-to-referenced-documents\/\">Updates<\/a> certain documents referenced in the National Model Codes.<\/p>\n<\/div>\n<\/div>\n\t\t\t<\/div>\n\t<\/div>\n\t<\/div><\/div>\n\n<h3>Combined proposed change forms are available in PDF file format<\/h3>\n<p><a href=\"\/eng\/public-review\/2026_2\/2026_2-proposed-changes-to-nbc-necb-nfc-npc-combined-file-2026-10-26.pdf\">Fall 2026: Proposed changes to NBC 2025, NFC 2025, NECB 2025, and NPC 2025 \u2013 combined file<\/a> (PDF \u2013 23,710 KB)<br \/><a href=\"\/eng\/public-review\/2026_2\/2026_2-supporting-documents-for-proposed-changes-to-nbc-necb-nfc-npc-combined-file-2026-10-23.pdf\">Fall 2026: Proposed changes to NBC 2025, NFC 2025, NECB 2025, and NPC 2025 \u2013 supporting documents<\/a> (PDF \u2013 9,003 KB)<\/p>","protected":false},"excerpt":{"rendered":"<p>This national public review runs from October 26 to December 21, 2026. The Canadian Board for Harmonized Construction Codes (CBHCC) invites code users, the Codes community, and the public to participate in the fall 2026 public review of proposed changes to the 2025 editions of the National Model Codes. The proposed changes included in this public review address the following topics: National Building Code of Canada Accessibility Building fire safety Conformity assessment Defined terms Energy efficiency for houses Environmental separation Fire alarm and detection systems Greenhouse gas emissions Heating, ventilating and air-conditioning systems Performance compliance Piping and duct insulation Radon and soil gas mitigation Structural design (Part 9) Updates to referenced documents National Fire Code of Canada Flammable and combustible liquids Hazardous processes and operations Piping and transfer systems Storage of combustible products and dangerous goods Updates to referenced documents National Energy Code of Canada for Buildings Conformity assessment Defined terms Service water heating Updates to referenced documents National Plumbing<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","footnotes":""},"class_list":["post-7969","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/cbhcc-cchcc.ca\/en\/wp-json\/wp\/v2\/pages\/7969","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cbhcc-cchcc.ca\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cbhcc-cchcc.ca\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cbhcc-cchcc.ca\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cbhcc-cchcc.ca\/en\/wp-json\/wp\/v2\/comments?post=7969"}],"version-history":[{"count":5,"href":"https:\/\/cbhcc-cchcc.ca\/en\/wp-json\/wp\/v2\/pages\/7969\/revisions"}],"predecessor-version":[{"id":8001,"href":"https:\/\/cbhcc-cchcc.ca\/en\/wp-json\/wp\/v2\/pages\/7969\/revisions\/8001"}],"wp:attachment":[{"href":"https:\/\/cbhcc-cchcc.ca\/en\/wp-json\/wp\/v2\/media?parent=7969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}