A grease filter is a mechanical component installed in Type I kitchen hoods that captures and removes grease particles from exhaust air before it enters ductwork. Grease filters prevent grease accumulation in ducts, reducing fire hazard and maintenance requirements. They are essential safety components in commercial kitchen exhaust systems handling grease-laden vapors from fryers, griddles, and similar equipment.
Technical Details
Common grease filter types include baffle filters with parallel plates, mesh filters with layered screens, and cartridge filters with pleated synthetic media. Filters typically capture particles down to 0.5 microns while maintaining face velocities between 60 and 100 feet per minute. Most commercial filters can handle air temperatures up to 400 degrees Fahrenheit. Filters require cleaning every 2 to 4 weeks in high-volume kitchens, with cleaning accomplished through hot water washing or commercial dishwashers.
Applications
Grease filters are mandated in all Type I hoods serving equipment producing grease-laden vapors. They are standard in restaurants, fast-food facilities, and institutional food service operations with cooking equipment.
Practical Significance
Proper grease filter maintenance reduces duct cleaning frequency, lowers fire risk, improves exhaust air quality, and ensures NFPA 96 compliance. Regular filter replacement extends ductwork life and maintains optimal hood performance.