Why Kitchens Need Professional Hood Cleaning Periodically

Grease Duct Access and Buildup Removal: Staying NFPA 96 Compliant
Grease ducts are the hidden middle section of your kitchen's exhaust system — connecting the hood above your cooking line to the exhaust fan on the roof. Because they're enclosed, grease buildup inside them often goes unnoticed until it becomes a serious problem.

Why Grease Ducts Need Attention
Every time your kitchen cooks, grease-laden vapor travels up through the hood and into the duct system on its way outside. Filters catch most of it, but not all. Over time, grease residue accumulates on the interior duct walls — and unlike a dirty filter, this buildup isn't visible without opening the duct.

Grease inside a duct is a serious fire risk. A grease fire that starts in the kitchen can travel through a dirty duct and spread far beyond the cook line, which is exactly why fire codes take duct cleanliness so seriously.

Accessing the Duct System Safely
Grease ducts are cleaned through access panels — designated openings built into the ductwork specifically for inspection and cleaning. NFPA 96 requires these access points to be properly placed and appropriately spaced so the entire duct run can be reached and cleaned, not just the sections near the hood or the roof fan.

When we clean grease ducts as part of your hood system service, we:

Open access panels to reach the interior duct surfaces
Remove grease buildup from duct walls using professional-grade equipment
Inspect duct condition, checking for damage, gaps, or areas of concentrated buildup
Reseal access panels properly to maintain the integrity of the fire-rated duct system
Document the service with before/after photos and a written compliance report
How Buildup Is Measured
Fire codes classify grease buildup by thickness, and the amount found often determines how soon your next cleaning should be scheduled. A duct with heavy buildup may need more frequent service, while a well-maintained system with regular filter cleaning may go longer between full duct cleanings.

Why This Matters Beyond Compliance
Beyond passing inspection, keeping your grease duct system clean:

Reduces fire risk throughout the entire exhaust path, not just at the hood
Maintains proper airflow, so your kitchen stays comfortable and your ventilation system isn't working overtime
Protects your investment in your exhaust system by preventing corrosion and buildup-related damage over time
Keeps your compliance records current, which matters for insurance, health inspections, and fire marshal visits
Part of a Complete Hood Cleaning Service
Grease duct access and cleaning isn't a separate add-on — it's a core part of a proper commercial kitchen exhaust hood cleaning service, alongside filter and fan cleaning. All three work together to keep your system safe and compliant.

Schedule a full system cleaning today. Call us at (888) 419-2659 or reach out through our contact form, and we'll provide a compliance report and before/after photos with every visit.