Profile: Colby Equipment Co. manufactures industrial and commercial air handling equipments. Air distribution products include cooling air outlets & nozzles, grilles, diffusers, terminal units, specialized environment products, underfloor products, displacement ventilation products and custom architectural products. Digital system controls include digital rooftop controls, DDC zone controllers and underfloor modulating controls. Ventilation products include propeller wall & roof fans, roof vents & duct fans, industrial fans, centrifugal, process, in-line centrifugal, duct, tubeaxial and vaneaxial.