Which NFPA standard covers the installation of sprinkler systems in one- and two-family dwellings and manufactured homes?

• A. NFPA 13D – Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes
• B. NFPA 13R
• C. NFPA 14
• D. NFPA 15

Answer: (A)

For residential sprinkler installations in one- and two-family homes and manufactured homes, the standard that applies is NFPA 13D. This standard is written specifically for those types of dwellings, providing the design and installation rules for automatic sprinkler systems tailored to single- and two-family residences and manufactured homes. It’s distinct from NFPA 13R, which targets low-rise residential occupancies more broadly (often multi-unit buildings) and isn’t the primary standard for manufactured homes. NFPA 14 covers standpipes, and NFPA 15 covers water spray systems, which are not the focus for these dwelling types. So NFPA 13D is the correct choice because it directly matches the occupancy described.