NFPA 96 Standards
8-3 CLEANING Hoods, grease removal devices, fans, ducts, and other appurtenances shall be cleaned to bare metal at frequent intervals prior to surfaces becoming heavily contaminated with grease or oily sludge. After the exhaust system is cleaned to bare metal, it shall not be coated with powder or other substance. The entire exhaust system shall be inspected by a properly trained, qualified, and certified company or person(s) acceptable to the authority having jurisdiction in accordance with Table 8-3.1.
Table 8-3.1. Exhaust Cleaning Inspection Schedule:
TYPE OR VOLUME OF COOKING FREQUENCY
Systems serving solid fuel cooking operations
Systems serving high volume cooking operations such as:
24 hour cooking, charbroiling, or wok cooking
Systems serving moderate-volume cooking operations
Systems serving low volume cooking operations such as:
churches, day camps, seasonal businesses, or senior centers
Upon inspection, if found to be contaminated with deposits from grease-laden vapors, the entire exhaust system shall be cleaned by a properly trained, qualified, and certified company or person(s) acceptable to the authority having jurisdiction in accordance with Section 8-3.
Grease filters shall be listed and constructed of steel or listed equivalent material and shall be of rigid construction that will not distort or crush under normal operation, handling, and cleaning conditions. Filters shall be tightfitting and firmly held in place.
Openings shall be provided at the sides or at the top of the duct, whichever is more accessible, and at changes of direction. Openings shall be protected by approved access panels that comply with 4-3.4.4. Exception: Openings shall not be required in portions of the duct that are accessible from the duct entry or discharge.
Approved upblast fans with motors surrounded by the airstream shall be hinged, supplied with flexible weatherproof electrical cable and service hold-open retainers, and listed for this use. * Reprinted with permission from NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations ©1998, National Fire Protection Association, Quincy, MA 02269. The reprinted material is not the complete and official position of the National Fire Protection Association, on the referenced subject which is represented only by the standard in its entirety.
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