Founded in 1973 as Harrington Environmental Engineering (HEE), we began with fiberglass vessels and expanded into thermoplastics through our merger with Duall. Now part of CECO Environmental since 2013, HEE-Duall designs corrosion-resistant scrubbers, fans, and ducting for harsh industrial and municipal environments—delivering proven solutions for controlling corrosive gases, VOCs, odors, and hazardous pollutants.