Which standard is applicable for the installation of sprinkler systems in low-rise residential occupancies?

The correct choice pertains to NFPA 13R, which is specifically designed for the installation of sprinkler systems in low-rise residential occupancies. This standard outlines the requirements for the design and installation of automatic sprinkler systems that provide life safety in residential buildings that are typically four stories or less in height.

NFPA 13R focuses on residential occupancy needs, incorporating elements such as the types of systems suitable for protecting occupants, the layout of sprinkler heads, and the necessary water supply configurations to ensure effective suppression of fires in these settings.

In contrast, NFPA 13D is also relevant for residential systems but is specifically tailored for one- and two-family dwellings, emphasizing life safety rather than property protection. NFPA 25 addresses the inspection, testing, and maintenance of water-based fire protection systems but does not provide installation requirements. NFPA 20 is focused on the installation of stationary fire pumps and is not directly related to residential sprinkler system installations.

Thus, NFPA 13R is the appropriate standard here, as it bridges the gap between ensuring safety and the specific considerations needed for low-rise residential structures.