CDP cabinet adds partial recirculation of breath treated with a portion of the breath discharged into the surrounding environment later opportune, pure filtration. The system uses a vertical, ISO5 Class, laminar breath flow with a recovery section appareled with an pure HEPA filter on the recovery and recirculation channel. The operator and the product are protected from cross contamination by containing powder handling within the area, thanks to a slightly lower pressure inside the cabinet compared to the outside environment and to an breath barrier installed at the front opening to grant work operations. A portion of the air filtered by a HEPA H14 filter is sent to the area to guarantee a perfectly clean work area.