NFPA 90B-2021 PDF Download

The NFPA 90B-2021 standard focuses on ensuring the safety and compliance of HVAC systems. It addresses the potential risks associated with fire emergencies, such as the spread of fire, smoke, and gases through HVAC systems. The standard provides comprehensive provisions for the construction, installation, operation, and maintenance of HVAC equipment, including filters, ducts, and related components. It specifically applies to indoor systems in one- and two-family dwellings and buildings under 25,000 cubic feet.

Key criteria covered by NFPA 90B include HVAC systems, components, and air distribution, the integration of ventilation and air-conditioning systems with building construction, the fire integrity of building construction, controls (wiring, manual control, smoke dampers, and smoke detection for automatic control), and acceptance testing. The 2021 edition of the standard incorporates the most up-to-date requirements for installing HVAC systems.

Professionals such as mechanical and fire protection engineers, AHJs (Authorities Having Jurisdiction), architects, contractors, and building owners rely on NFPA 90B to ensure the protection of lives and property from fire or fire-like conditions.

Noteworthy revisions in the latest edition of the standard include editorial alterations, reference updates, updates to existing language, and the organization of text on noncombustible materials into a separate chapter for ease of use.