Hotel Kitchen Hood: NFPA 96, UL 300 Wet Chemical and Grease Duct

5-star resort hotels host 2,000+ beds + 8 restaurants + 5,000+ covers/day. The kitchen hood collects grease fumes and duct temps can hit 500 C. NFPA 96 mandates 450 mm extension, UL 300 wet-chemical system and clean-out ports every 5 m.

Hood Design

• Type I: Grease, high heat
• Type II: Steam, heat
• Extension: 450 mm min beyond
• Capture velocity: 0.25-0.5 m/s
• Filter: Baffle, UL Class I

Grease Duct

• Velocity: 7.6 m/s min
• Slope: 2 percent to pit
• Material: Stainless 16 ga
• Clean-out: Every 5 m
• Clearance: 450 mm combustible

UL 300 Wet Chemical

• Agent: Potassium acetate (CH3COOK)
• Flow: 4.5-7.5 L/min nozzle
• Coverage: 1 nozzle/wok
• Fuel shut-off: Gas valve auto
• Duct nozzle: Every 3.7 m

Inspection

• Grease cleaning: Monthly 24/7
• Semi-annual: Catering weekly
• Fusible link: 6-month check
• Tank pressure: 3 months
• UL 300: Annual certified

Fire Cases

• Two resort hotels: hood fires, minor
• A hotel kitchen: Oil hood fire
• A 5-star city hotel: UL 300 system
• Old CO2: Now wet-chem mandatory
• Las Vegas MGM 1980: Kitchen incident

MEP Calc — 110+ Engineering Calculators

MEP Calc bundles 110+ engineering modules in one iOS app: 21 fire calculations (sprinkler, fire pump, FM-200 clean agent) plus heating, cooling, HVAC, plumbing, steam and natural gas. Download it on the App Store.

Download MEP Calc on the App Store

SprinkCalc — Fire Sprinkler Design Across Three Standards

SprinkCalc covers hazard classification, design density and area, K-factor selection, water demand and hydraulic calculations for NFPA 13, FM Global and BS EN 12845 in a single iOS app, and exports a professional PDF report. One of the few tools that unifies all three major fire protection standards.

Download SprinkCalc on the App Store