As per NFPA 96 5.1.1. kitchen hood construction shall be steel not less than No. 18 MSG in thickness or stainless steel not less than No. 20 MSG in thickness. As per NFPA 96 Appendix A.5.4. it states examples of acceptable materials for hoods include steel and stainless steel. Additionally many health officials prohibit galvanized steel in hoods as does NSF/ANSI 2.
Are Fire Departments in Ontario allowing galvanized hoods to remain in existing restaurants?