The Modular Filtration Systems (MFS) consist of portable HEPA filtration unit(s) designed to filter clean room air to eliminate working level contamination. The design is generic to allow use of single or multiple units. MFS consist of HEPA supply units, return fan units (either HEPA or non-HEPA), and full side ESD walls. As the unit is filtering clean air within a clean room, a standard ISO 8 (Class 100,000) area will be maintained under ISO 7 (Class 10,000). The primary objective is to achieve a continuous laminar flow velocity of 90 +/- 30 ft./min. throughout the entire space to keep particles in motion across the zone and particle population below ISO 7 (Class 10,000) for activity. The Astrotech Space Operations design achieves this objective with full open ceiling access and allows for a modular design to adapt to changing requirements and equipment placement. Side wall design is dependent on specific customer requirements or personnel entry points.