G4/AS1: Ventilation

G4 VENTILATION ACCEPTABLE SOLUTION G4/AS1 Features of this document Features of this document • For the purposes of Building Code compliance, the standards and documents referenced in this verification method and acceptable solution 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 acceptable solution are part of, and have equal status to, the acceptable solution. 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) • Classified uses for buildings, as described in clause A1 of the Building Code, are printed in bold in this document. These requirements are also denoted with classified use icons. H Housing Com Commercial Out Outbuildings CR Communal residential Ind Industrial Anc Ancillary CN Communal non-residential MINISTRY OF BUSINESS, INNOVATION AND EMPLOYMENT 28 JULY 2025 Page 4