Class ISO 5 horizontal laminar flow cabinets (former class 100) are ideal for jobs where it is necessary to ensure the products are protected from external contamination and cross-contamination. Thanks to the specific way the side walls, located inside the inner perimeter of the filter, are assembled it is possible to prevent any contaminants that may be present from entering the work area through the filter frame thanks to the Venturi effect. The air collected from the environment is prefiltered using polyurethane at high weight efficiency and, pushed by the fan engine to the retention plenum, it then passes through the absolute filter and is released into the work area. The air emerges from the H14 HEPA filter located in front of the operator, moving in a compact, laminar fashion creating a Class ISO 5, hence sterile, work space and making sure no contaminating particles are close to the product being handled.