It is well known that displacement ventilation can potentially decrease energy usage while improving indoor air quality. There is little to no guidance on how to apply displacement ventilation in an industrial setting for the purposes of controlling airborne particles. The presentation focuses on a large factory space where the control of manganese particles from the welding processes is of primary concern. CFD simulations with particle tracking are used to assess the effectiveness of the design and highlight the most important design parameters that affect breathing zone particle concentrations.