NFPA 13D -2025, Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes

NFPA 13D, Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, features up-to-date criteria addressing every aspect of sprinkler design and protection, water supplies, equipment, and placement in one- and two-family dwellings, manufactured homes, and townhouses.

Installers and contractors need the latest edition of this standard to address different types of construction, work with the latest technologies, and help reduce fire risks. The standard applies to one- and two- family dwelling units and manufactured homes to allow for the installation of cost-effective fire sprinkler systems in these types of residential occupancies.

The 2025 edition features several significant updates including:

• Revised conversion factors in Chapter 1
• New definition for “ceiling pocket”
• Differentiation between LED-style lights and other lights as a heat source
• New guidance on installing sidewall sprinkler beneath a sloped ceiling
• Clarification on closets with no doors
• Location criteria on sprinkler installation above fuel-fire equipment
• Added pipe sizing calculation worksheet
• Updated Chapter 12 annex to identify additional tasks that should be performed during an inspection