Dezhou Jujin Air Conditioning Equipment (德州巨金空调设备有限公司) is based in the Luquantun industrial park in Wucheng County, Dezhou. It produces CCC-certified smoke exhaust fans, fire dampers, smoke exhaust valves and multi-blade smoke outlets. It also makes centrifugal fan cabinets, axial and pressurisation fans, air-handling units, fan coils and ductwork, and takes custom orders. Its fire dampers and smoke exhaust valves hold fire product certifications 5982026ZY060121 and 5982026ZY060118 from the Tianjin Fire Research Institute of the Ministry of Emergency Management.