Duall, a division of Met-Pro Corporation, is headquartered in Owosso, Michigan. Duall Division is a leading manufacturer of air and water quality control systems for the treatment of odors, corrosive fumes and toxic gas i......Duall, a division of Met-Pro Corporation, is headquartered in Owosso, Michigan. Duall Division is a leading manufacturer of air and water quality control systems for the treatment of odors, corrosive fumes and toxic gas in industrial and municipal applications. Our major products include Hexmaster® and HepaHex dry scrubbers MistMiser™, Mist-X® and Oilmaster™ mist eliminators fume and emergency gas scrubbers BetaNox® Nox scrubbers Hydrolance™ wet particulate dust collectors odor control wet scrubbers and AroBIOS™ bioscrubbers aeration towers and degasifiers and DUALLast® FRP corrosion resistant ducting and exhaust fans. Major industrial customers include metal finishers, pharmaceutical manufacturers, chemical processors, semiconductor facilities and battery manufacturers. In the municipal market, Duall provides odor control scrubbers for the removal of sewage plant odors and degasification systems for the treatment of contaminated groundwater