ENA-S from Keller USA Inc. is a stand-alone mist collection system for individual machining centers that has an operating airflow range of 600 to 1,500 cfm (183 to 457 cu. m/min.), which is suitable for wet machining. The system has floor-accessible filter stages and a footprint of less than 2.5'×2.5' (0.76m × 0.76). It can recirculate exhaust air from four stages of filtration, including a final HEPA stage.