With more than 85 years of operating experience, National Steel City, LLC (NSC) delivers comprehensive construction services, specializing in prime and turnkey installation of Air Quality Control Systems: scrubbers, absorbers, SCRs, and renovation rebuild of precipitators and scrubbers to the erection of Air-Cooled Condensers (ACCs) and coal-handling systems. Today, NSC is North Americaﾒs largest ACC installation contractor. We take on the responsibility of working directly with Facility Owners as well as large prime subcontractors.