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self closing

  1. N

    Stairwell Pressurization - Exit door to self close against 50Pa pressure differential across door?

    Hi, I would like clarification regarding whether if it is required by NFPA or IBC for the exit door to self close after it has been opened? The staircase pressurization fan would be running to maintain a pressure differential of 50Pa across the all the staircase door when they are all kept...
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