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NBC Air Filtration and Ventilation Systems

Atmas offers professional, advanced and certified solutions that are installed in thousands of civil defense shelters, government and industrial shelters and bunkers, private shelters and saferooms around the world.
The systems can be integrated in wide range of applications of various sizes, starting from small private shelters and up to very large civil defense shelters designed for thousands of occupants and require a very large volume of air.

Systems by types


Why NBC / CBRN / TIC air filtration systems are required

NBC – Nuclear, Biological, Chemical
CBRN – Chemical, Biological, Radiological, and Nuclear
TIC – Toxic Industrial Chemicals


NBC / CBRN / TIC air filtration systems are designed to provide fresh filtered from contaminants and particles air into protected spaces for creating a toxic free area (TFA). Depending on their purpose and integrated filters such systems can filter different war or industrial gases and chemicals, biological particles like viruses and bacteria, radiological and nuclear particles and materials, as well as coarse and fine dust and more.

Integrated into the systems filters define what kind of gases and particles the filter can filter/adsorb. The filters usually have to meet the requirements of different civil defense standards or can be specially designed to meet specific purposes. As an example, in nuclear power plants and nearly located facilities commonly there are requirements for additional Iodine adsorption capabilities of the filters. 

NBC filtration systems can be installed together with air handling units (AHU) in large shelters to distribute the air correctly to all parts of the shelters and prevent concentration of carbon dioxide (CO2) and maintain correct levels of oxygen (O2) in all rooms and parts of the shelter. In smaller shelters the air can be distributed by the system itself with support of air duct and placement of overpressure valves.

For shelters, bunkers and facilities that can be operated in isolation mode systems air regeneration systems need to be added – carbon dioxide (CO2) removal systems (scrubbers) and compressed air/oxygen (O2) supply systems for maintaining required levels of CO2, O2 and overpressure. 


SAFE 360 NBC air filtration in saferoom
SAFE 360 components

SAFE 360 NBC air filtration system for small shelters / saferooms

NBC air filtration systems for small shelters, saferooms and chambers

SAFE-360 NBC air filtration system from Arconik is specifically designed to fit small shelters, like private/family shelters, saferooms, appartments, containers, and other spaces where NBC (nuclear, biological, chemical) air filtration and ventilation may be required. The compact “floor-free” design allows to save floor space as well as to use the shelter as a dual-use space for everyday activity. Thousands of shelters where these systems are installed, used as playrooms, bedrooms, offices and more in everyday life and can be ready for use as a shelter within minutes or even seconds.
SAFE 360 allows easy installation in new structures or can be retrofitted in existing rooms or spaces. Compact, esthetic and user-friendly design can fit any room and the system can be operated by most of the people after short training session

  • Tested and certified solution that comply with the requirements of various modern civil defense standards

  • Compact case – only 46x35x25 cm

  • Cost-Effective – thousands of such systems produces every year, what allows to offer the system at very competitive price

  • Operation modes: NBC filtration (36 CMH) / ventilation (54 CMH), multiple systems can be installed in single shelter in case larger airflow is required. The system is designed to provide fresh filtered air and to create/keeping the shelter over pressurized (depending on the airtightness of the shelter)

  • Operational voltage 100-240v 50/60Hz

  • Manual backup for cases of power outage during operation

  • SAFE 360 is a complete solution that includes in the set blast valve with prefilter, NBC filter (carbon + HEPA), electric blower, manual backup (for operation during power outage) and overpressure valve

NBC air filtration systems for medium and large shelters and bunkers

BSM series NBC air filtration systems for shelters and bunkers ranges from 100 CMH to 1,800 CMH (the number states the airflow in NBC filtration mode). The BSM systems have modular design which allows flexibility in installation what is extremely important for limited space of shelters, bunkers, machine rooms, etc.
Most of the BSM series system can be installed on the floor, on the wall (floor-free) or hidden (covered by design elements) what allows to maximize the shelter space as well as to use the shelter for dual use purposes as a standard room, office, storage space and more. Such systems can be fitted to small, medium or to large shelters, and commonly installed in schools, kindergartens, hospitals, apartment and office buildings as well as various commercial and industrial facilities.

  • Tested, rugged and professional system, design for operation in hard conditions (temperature, humidity, shock, etc.) and designed to comply with the requirements of various modern civil defense standards or can be customized to client’s/local requirements.

  • Wide range of systems with airflows in  NBC filtration modes (CMH): 100, 180, 240, 300, 450, 600, 900, 1200, 1800 m3/h. 

  • Operation modes: NBC Filtration / Ventilation modes (bypass mode). The airflow in ventilation mode is usually double the value of the filtration mode. 

  • Modular design for various installation options – floor or wall/ceiling mounting for easy operation and space optimization

  • Manual backup option for cases of power outage during operation

  • Typically, BSM type systems include: blast valve, prefilter, airflow volume regulator, NBC filter, electrical blower, manual backup for the blower, overpressure valve/s and connecting chemical resistant and clean air duct and hoses.  

Floor free NBC air filtration 600
NBC air filtration 300 english

BSM series NBC air filtration systems installation options

Filter bank NBC filtration
Filter bank NBC filtration 2

Filter bank installed in large civil defense shelter

Filter banks – NBC filtration units for large air volume


Filter-banks are commonly designed for the specific air volume according to the project requirements and can combine number of NBC/CBRN or CO2 filters connected between them into one unit. Various NBC filter options can be used in the design (600, 900, 1,200, 1,800 CMH) creating a unit that can supply very high air volume in both NBC filtration and ventilation modes. Because of the modularity of such units, they can be designed to fit a limited and non-standard available space of the machine room or the toxic free area (TFA) of the shelter itself. 
The filter banks can be designed considering the special requirements of the shelter, its size, the number of people, the allocated space, as well as according to local or international standards, regulation or construction norms, climate zone and environmental conditions, shock resistance and blast protection requirements, and many other factors. A single shelter can have multiple filter-banks to accommodate any size of shelter and any number of people.
The Filter-Banks are based on standard and certified components, ensuring the safe operation of the system and can also be designed as manual, semi or fully automated with connection to an SMS (Shelter Management System) and an off-site remote operator.
Such Filter-Banks are usually installed in Subway Stations, Hospitals, Underground Parking Lots, Tunnels or any other large governmental or civil defense shelters.

  • Custom design for specific airflow ( from 1,200 m3h, 2,400m3/h, 3,600m3/h, 7,200 m3/h,  to 18,000 m3/h, and even larger), using standard filters and components.

  • Designed to meet project specifications and various international standards

  • Multiple systems can be installed in a single shelter to meet any airflow requirements.

  • Manual, semi-automatic and automatic operation and control options are available.

  • Can be integrated with any management software and remote control.

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