Assist in reducing the risk of fire and associated hazards in single- and two-family homes. Current guidelines covering all facets of sprinkler design and protection, water supplies, equipment, and placement in single- and two-family homes, manufactured homes, and townhouses are included in NFPA 13D, Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes. To handle various construction types, operate with the newest technology, and assist lower fire risks, installers and contractors need the most recent edition of this standard. In order to enable the installation of affordable fire sprinkler systems in various kinds of residential occupancies, the standard is applicable to prefabricated houses and one- and two-family dwelling units.