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Q: We are installing a new HVAC system in the basement of the hospital. Now a building inspector is telling us we need to install fire-dampers in the ductwork that penetrates the deck to the floor above. Is this correct?
A: Yes, it is, and the inspector is correct. According to NFPA 90A-2012, section 18.104.22.168, where air ducts extend through only one floor and serve only two adjacent stories, the air ducts shall be enclosed or fire dampers shall be installed at each point where the floor is penetrated.