2024 NFPA 90A Standard for the Installation of Air-Conditioning and Ventilating Systems

NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems 2024 edition establishes mandatory requirements for fire protection in heating, ventilation, and air conditioning (HVAC) systems — addressing smoke migration control, fire hazard reduction, and the safe installation of forced air systems across all building types. This ANSI-approved standard covers building construction requirements, filters, ducts, dampers, controls, acceptance testing, operation, and maintenance of HVAC systems. The 2024 edition underwent significant reorganization and adds new technical provisions for combination fire-smoke dampers, corridor dampers, UV-C germicidal lamp systems, and MEP control locations. Who Uses NFPA 90A Required by mechanical engineers, HVAC system designers and contractors, fire protection engineers, AHJ officials, building inspectors, and facility managers responsible for the design, installation, and maintenance of HVAC systems in commercial, institutional, in