Hally’s Biosafety cabinets are designed to be safe: “A ventilated cabinet for product, and environmental protection having an open front with inward airflow for personnel protection, downward HEPA filtered airflow for product protection, and HEPA filtered exhaust air for environmental protection.” The primary purpose of a Bio Safety cabinet is to serve as a means to protect the Laboratory worker and the surrounding environment from pathogens. All exhaust air is HEPA-filtered as it exits the biosafety cabinet, removing harmful bacteria and viruses.