Constructed with metal and filter materials for long lasting durability. Ducts industrial portable air conditioner through drop ceiling space. Provides superior ventilation of exhaust and improved cooling source. Includes two 8' L x 20" dia. air ducts, 2 ceiling replacement tiles and metal straps. Metal straps secure ducts in position. Air deflectors on ceiling tile help direct airflow for ventilation. Assembled. BTU cooling is 42,000. CFM high is 1,400. Amps are 40. Voltage is 208-230.