NFPA 96 guidelines 4

https://baremetalsurfacecleaningguide.evergrovio.com/posts/why-bare-metal-surface-cleaning-matters-for-kitchen-exhaust-fire-safety

NFPA 96 guidelines are the gold standard for commercial kitchen fire safety, covering everything from hood installation to exhaust system cleaning. They set rigorous schedules for grease removal to prevent dangerous buildup, and specify how systems must be designed to work effectively. Following them keeps both staff and customers safe.