NCA is a brand of Metal Industries Inc., offering a complete line of louvers and dampers. NCA’s extensive line of dampers range from air control and balancing to life safety applications. NCA also has an impressive line of louvers including AMCA listed, acoustical, operable and hurricane tested louvers. Through engineering and testing, NCA will continue to be a major player in the louver and damper market so engineers and designers can specify NCA with confidence.