About Controlled Environments Limited (CEL)The CEL Group of Companies (CEL) comprises Conviron Canada, Conviron USA, Conviron Europe and Conviron Australia - together forming the world’s leading designer and supplier of controlled environments for plant growth. CEL Group also includes Argus Controls, one of the leading suppliers of plant-centric environmental controls and automation systems used in greenhouse and indoor growing facilities. Together, Conviron and Argus provide technologies to our clients in the plant science research and commercial horticulture industry in over 90 countries. CEL is proud to be part of Madison Air, a Madison Industries company. Publicly traded, Madison Air (NYSE: MAIR) is an air quality solutions provider serving commercial and residential markets through a portfolio of trusted brands. Madison Industries builds entrepreneurially driven, branded market leaders that are committed to making the world safer, healthier and more productive by creating innovati...