System Overview A ventilate sandwich panel is a modular cleanroom return air panel engineered to organize airflow direction and support integrated fresh-air circulation without external ductwork. Positioned at the lower part of the workshop, it channels air in the same direction as particle settlement, ensuring dust and contaminants are carried directly to the return air outlet. Built as a modular sandwich structure and available in louver, grate-hole, mesh-plate, orifice-plate, and mushroom-outlet configurations, it integrates with fresh-air circulation and filtration systems to maintain consistent air quality across general cleanroom workshops. Key architectural advantages include: Unified Airflow Direction: Return air outlets are positioned in the lower zone of the workshop so airflow matches the natural settling direction of dust particles, maximizing removal efficiency. Integrated Air Channels: Air distribution pathways are built into the panel structure, eliminating external ductwork, saving overhead space, and reducing static electricity build-up. Cross-Contamination Prevention: High filter efficiency at the return air outlet supports fresh-air circulation and blocks pollutant migration between adjacent cleanroom workshops.