The bottom and sides of combustible cabinets over cooking appliances or tops including a space of 6 inches from the edge of the burners must be protected with at least 5/16 inch sheetrock with a 25 flame-spread. This material must be behind deep-fat fryers, grills, ranges, and other cooking appliances. It must extend 6 inches beyond the edge of the appliance and range hood.

(1) Range hoods for commercial equipment must meet the requirements of the mechanical code such as fire suppression, etc.

(2) Range hoods for noncommercial equipment may be of a residential type.

(3) The hood must be centered over and at least as wide as the top of the cooking appliance.