The company's 2004 product line catalog has updated information on the Dry-O-Tron® indoor pool and humidity control line, Circul-Aire Inc. air purification for industrial/commercial air pollutants and toxic air products, RefPlus Inc. refrigeration equipment, Thermo Plus Air Inc. heating-air conditioning IAQ equipment, and Ecosaire® environmental control products. This free, eight-page catalog includes photos and brief descriptions of the items.