lsb industries, inc. is a manufacturing, marketing, and engineering company with activities on a worldwide basis. lsb's principal business activities, through its subsidiaries, are the manufacturing and sale of a broad range of hydronic fan coils, water source and geothermal heat pumps, large custom air handlers and other products used in commercial and residential air-conditioning systems. it also manufactures and sells chemical products for mining, quarry and construction, agricultural and industrial acid markets.