HVAC Systems Encyclopedia

A comprehensive encyclopedia of heating, ventilation, and air conditioning systems

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Fire-Rated Penetrations

Sections

NFPA 90A: Air-Conditioning and Ventilating Systems

Comprehensive requirements for NFPA 90A Standard for Installation of Air-Conditioning and Ventilating Systems, covering duct construction, fire dampers, smoke dampers, penetrations, and fire protection for commercial HVAC systems.

Duct Penetrations Through Fire-Rated Assemblies

Comprehensive requirements for duct penetrations through fire-rated assemblies, including firestop systems per ASTM E814 and UL 1479, F-rating and T-rating requirements, annular space protection, and installation details for maintaining fire-resistance ratings.