Hood, filters, plenum, accessible ductwork, exhaust fan, and rooftop grease path are the focus.
Signs You Need Cleaning
Signs Your Hood System Needs Cleaning Now
Warning signs that a commercial kitchen exhaust system is overdue for cleaning.
Practical guidance
Los Angeles kitchens vary by cooking load, hours, equipment, roof access, and documentation pressure. The safest plan is to inspect the system, clean the full exhaust path, and set a maintenance interval that matches how the kitchen actually operates.
For most busy restaurants, quarterly service is common. Solid fuel, charbroiling, wok cooking, and high-volume frying may need monthly attention, while lower-volume systems may qualify for semi-annual or annual maintenance.