View Full Version : Fire dampers in Exhaust Duct
01-07-2009, 11:40 PM
Just wondering if anyone remembers when the code changed dissallowing fire dampers in Non UL listed ducts and duct systems.
04-02-2009, 09:50 AM
It was in the atter part of the 90's. fire hazard as the dampers would collect grease and not close
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