The Affiliated Steam Equipment Company was founded in 1958. Affiliated Steam markets various products and solutions for controlling heat transfer. Affiliated Steams sales coverage includes Illinois, Indiana, Iowa and Wisconsin and several Kentucky and Michigan counties. The corporate headquarters is in Alsip, Ill., and has local branch offices in Decatur, Ill., Brownsburg, Evansville and Fort Wayne, Ind., Davenport, Iowa, and Menomonee Falls and Little Chute, Wis.