NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, has been providing information and criteria vital to safety in the built environment since first developed back in 1899. This ANSI-approved standard for heating, ventilation, and air conditioning covers provisions for stopping the migration of smoke and reducing the chance of fire, gases, and related hazards in forced air systems.

From general definitions and requirements to the integration of ventilation and air-conditioning with building construction, controls, and acceptance testing, NFPA 90A is a valuable resource for helping to protect lives and property and staying up to code. You get complete information on all areas of construction, operation, and maintenance of systems, including filters, ducts, and other equipment.

NFPA 90A offers criteria for buildings over 25,000 cubic feet and buildings more than three stories in height classified as Types III, IV, and V construction. The standard also applies to buildings or structures not covered by any applicable NFPA standards.

The 2024 Edition provides substantial changes to the standard as a result of a comprehensive review by the committee.