Section R. 400.18654 - Cooking appliancesRule 654.
(1) A cooking appliance shall be suitably installed in accordance with approved safety practices.(2) A metal hood or canopy that is provided over a main kitchen cooking appliance shall be equipped and designed in compliance with the provisions of the national fire protection association pamphlet no. 96, 1971 edition, entitled standard for the installation of equipment for the removal of smoke and grease-laden vapors from commercial cooking equipment, which is adopted by reference in R 400.18659.(3) Filters shall be maintained in an efficient condition and kept clean at all times.(4) Only vaporproof-type electrical wiring and equipment shall be permitted in hoods or canopies.(5) An exhaust duct from a hood shall be run to the outside by the shortest possible route and, when run through open spaces between a ceiling and a floor or roof or through any floors above, shall be enclosed in a horizontal or vertical shaft that is protected from the remainder of the building by construction that will afford a 2-hour-fire-resistance rating.Mich. Admin. Code R. 400.18654