exhaust duct cleaning 3

https://wiki-nest.win/index.php/Why_NFPA_96_Requirements_Matter_for_Your_Commercial_Kitchen

When dirt and grime build up inside exhaust ducts, it can not only reduce air quality but also create a fire hazard. A thorough cleaning involves scrubbing and often disinfecting the interior surfaces, which helps keep your kitchen or workshop environment safer and more pleasant. It's a messy but necessary task that should be done periodically, especially if you cook a lot or run equipment that produces fumes.