Remove all heating and cooling recirculators from the classified area.  Supply and return line circulate your fluid from an outside wall.  3/8″ JIC fittings supply the inside of the room with customizeable hose barbs on the outside to connect to your recirculators. Comes complete with fire caulk and insulating foam.  Adjustable size fits most standard size thickness of wall.  Comes complete with vacuum line to remove vacuum pump from the Class 1 Division 1 environment.