What is the minimum required density for sprinklers in a commercial kitchen protection system, as defined by NFPA 13, 2017 edition?

The minimum required density for sprinklers in a commercial kitchen protection system, as defined by NFPA 13, 2017 edition, is 0.15 gallons per minute per square foot (gpm/sq. ft.). This density is established to ensure effective fire suppression in environments where cooking operations pose a higher risk for fire, specifically in commercial kitchens where fats, oils, and cooking equipment can create challenging fire conditions.

By specifying 0.15 gpm/sq. ft., NFPA 13 ensures that the sprinkler system delivers a sufficient amount of water to control or suppress a fire that could rapidly escalate due to flammable materials. Adequate water density is critical in these high-risk areas, as it directly impacts the system’s ability to protect occupants and property effectively.

The density requirement is lower than that for other types of hazards primarily due to the unique characteristics of cooking-related fires and the assumption that grease-laden vapors contribute to the fire load. Thus, the standard is tailored to balance the need for effective suppression with considerations for system design and water availability.