Since 1963, SEMCO Incorporated has pioneered products and services that improve indoor environments. Today, it is a worldwide innovator of desiccant-based products and systems able to recover energy, increase ventilation and control humidity. The company is also among the world s largest fabricators of energy-efficient spiral pipe and fittings, acoustical enclosures and sound attenuators. This technology makes it possible to provide state-of-the-art energy recovery systems that help customers meet ASHRAE Standard 62 indoor air quality requirements while simultaneously conserving energy. SEMCO is a privately held company with headquarters in Columbia, Mo. The company operates six manufacturing facilities at the following locations: Salisbury, Mo., Roanoke, Va., Crossville, Tenn., Petit Jean and Morrilton, Ark.