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Why is supply side smoke detection required by NFPA 90a but not by the IMC?

Question asked by kevinbrown on Jan 27, 2017
Latest reply on Aug 26, 2017 by milt.werner

The IFC does not reference NFPA 90a, but it does reference NFPA 72 which in turn references NFPA 90a. Is that how I require supply side smoke detection, and further, should I? 

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