Which of the following areas does not require sprinklers according to NFPA 13R?

The area that does not require sprinklers according to NFPA 13R is bathrooms less than 55 square feet. NFPA 13R outlines the requirements for the design and installation of sprinkler systems in residential occupancies, particularly where such systems are intended to protect against fire hazards.

One of the key provisions of NFPA 13R allows for some exemptions based on the size and type of room. Specifically, bathrooms that are under 55 square feet are considered to present a lower risk level for fire hazards, which is why sprinklers are not mandated for such spaces.

Other areas such as living rooms, garages, and basements may present greater fire risks due to their potential contents and usage, leading to requirements for sprinkler protection under NFPA 13R. Thus, the distinction between these spaces reinforces the design considerations aimed at focusing safety measures where they are most needed, while relieving smaller, less hazardous areas from the burden of sprinkler installation.