Extended coverage sprinklers provide wider area protection than standard. Which statement is true?

Extended coverage sprinklers provide wider area protection than standard. Which statement is true?

• A. They require higher water pressure
• B. They provide wider area protection than standard
• C. They have smaller coverage per head
• D. They are never used in NFPA 13R

Answer: (B)

Extended coverage sprinklers are designed to protect a larger area per head than standard coverage sprinklers. In low-rise residential systems rated by NFPA 13R, using these sprinklers reduces the number of heads and piping needed while still meeting the required protection, because each head covers more floor area as defined by its listing. The water flow and pressure remain determined by the hydraulic calculations for the chosen spacing and the system’s overall design; they are not inherently required to be higher just because the heads cover more area. The option that they have smaller coverage per head is incorrect, and extended coverage sprinklers are allowed to be used in NFPA 13R, so the statement about never being used there isn’t accurate.

Extended coverage sprinklers are designed to protect a larger area per head than standard coverage sprinklers. In low-rise residential systems rated by NFPA 13R, using these sprinklers reduces the number of heads and piping needed while still meeting the required protection, because each head covers more floor area as defined by its listing. The water flow and pressure remain determined by the hydraulic calculations for the chosen spacing and the system’s overall design; they are not inherently required to be higher just because the heads cover more area. The option that they have smaller coverage per head is incorrect, and extended coverage sprinklers are allowed to be used in NFPA 13R, so the statement about never being used there isn’t accurate.