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Chimney Effect myth with 2-piece arc flash suits

Question asked by on Jul 9, 2018
Latest reply on Aug 6, 2018 by chuck.huddleston

My organization is looking to replace our old a 40 cal arc flash suits.  Currently all of our suits are of the 1-piece coverall design.  For heat stress concerns, I am interested in replacing them with 2-piece jacket & pant style gear.  However, a concern has been brought up regarding a possible "chimney effect" where the arc flash could rise up the jacket.  I can find no such text anywhere supporting or refuting this concern.  My thoughts were that if this were possible, there would not be NFPA 70E certified 2-piece arc flash suits.  Has anyone ever run into this concern or have any information I can use to refute this?