A model DFE 4-48 cartridge dust collector from Donaldson was selected due to its small footprint and high airflow capacity. This unit was able to replace three existing dust collectors handling a total airflow of 39,360 CFM. The engineering design, including ductwork and hoods by AST, allowed for the air to be returned into the plant optimizing the air temperature and producing a wash down effect. This was accomplished by returning the air back into the plant through two main diffusers. One recirculated the air to an adjacent warehouse and the other directly into the production area. This kind of approach creates a constant negative pressure inside the production area. The air returned to the plant is cooled down during the summertime using a high-efficiency coil with chilled water. The challenging ductwork design, comprised of more than 60 individual pickup points, were properly balanced by the AST Engineering team, achieving proper conveying capture and conveying velocities in each hood. The 250 hp fan on the dust collector is automatically controlled through real-time airflow measurement to compensate for the static pressure fluctuation from the filters. After one year in service, the dust collector is performing without any filter changes.