G4/VM1: Ventilation verification method

G4 VENTILATION VERIFICATION METHOD G4/VM1 Main changes in this version and features of this document Main changes in this version This verification method is the fifth edition of G4/VM1. The main changes from the previous version are: • The document has been published in a standalone format and the layout has been revised to improve clarity. This includes using a common structure for headings and text throughout the verification method. • Portions of text have been re-written to enhance clarity in the document and provide consistent language with other acceptable solutions and verification methods. • A title of the document has been provided to the document to reflect the scope of the verification method. Additional information on the document and its scope is provided in Part 1. General. • References have been revised to reflect the documents cited in this verification method solution in Appendix A. • Definitions have been revised to reflect the terms used in this verification method in Appendix B. People using this document should check for amendments on a regular basis. The Ministry of Business, Innovation and Employment may amend any part of any acceptable solution or verification method at any time. Up-to-date versions of acceptable solutions or verification methods are available from www.building.govt.nz. Features of this document • For the purposes of Building Code compliance, the standards and documents referenced in this verification method must be the editions, along with their specific amendments listed in Appendix A. • Words in italic are defined at the end of this document in Appendix B. • Hyperlinks are provided to cross-references within this document and to external websites and appear with a blue underline. • Appendices to this verification method are part of, and have equal status to, the verification method. Figures are informative only and the wording of the paragraphs takes precedence. Text boxes headed ‘COMMENT’ occur throughout this document and are for guidance purposes only. • A consistent number system has been used throughout this document. The first number indicates the Part of the document, the second indicates the Section in the Part, the third is the Subsection, and the fourth is the Paragraph. This structure is illustrated as follows: 2 Part 2.5 Section 2.5.3 Subsection 2.5.3.1 Paragraph 2.5.3.1(a) Paragraph (as a portion of the relevant paragraph) 2.5.3.1(a)(i) Paragraph (as a portion of the relevant paragraph) MINISTRY OF BUSINESS, INNOVATION AND EMPLOYMENT 28 JULY 2025 Page 3