NBC-protection and decontamination system

An NBC protection and decontamination system, comprising:

• an enclosure defining a space, serving as toxic-free area, said enclosure having at least one clean-air inlet port and at least one air outlet;
• at least one airlock serving as decontamination unit at the outside of said enclosure and containing, in an air-and-warfare-agent-tight configuration:
• an airlock compartment, having a ceiling, and including a back-flow collector;
• at least one air filtration unit using a blower drawing air from said backflow collector through at least one filter element, and forcing said air into a space upstream of said airlock compartment;
• at least one compartment inlet valve communicating with the air outlet of said enclosure;
• at least one exit valve being provided in said compartment and spaced apart from said compartment inlet valve, and an opening providing controllable passage between said enclosure and said airlock, and an opening providing controllable passage between said airlock and the outside, and
• characterized in that said airlock compartment is swept by two different airflows, a first airflow originating in said enclosure and a second airflow produced by said filtration unit.