Which standard must metal chimneys meet during construction and installation?

The correct choice is NFPA 211, which specifically addresses the standards for chimneys, fireplaces, vents, and solid fuel-burning appliances. This standard lays out the requirements for the design, installation, and maintenance of these components to ensure safety and efficiency. It also focuses on structural integrity and fire prevention for chimneys, making it essential for any construction and installation involving metal chimneys.

The relevance of NFPA 211 is further highlighted by its comprehensive guidelines, which prioritize the protection of the building occupants and the integrity of the surrounding environment from potential hazards associated with improper chimney installation, such as fire risk and carbon monoxide issues. Thus, adhering to NFPA 211 ensures compliance with safety regulations and promotes best practices within the industry.