CBRN / NBC Filtration Systems
Professional CBRN (Chemical, Biological, Radiological, Nuclear) air filtration and emergency ventilation systems for shelters, bunkers, safe rooms and protected facilities — from mid-capacity to large-scale battery systems.
Air Filtration You Can Trust Your Life With
Atmas offers a wide selection of standard and customizable CBRN/NBC air filtration and emergency ventilation systems designed for installation in protected spaces. These systems provide fresh filtered air for safe breathing, maintain overpressure, and create a protected environment in the intended area.
Whether facing nuclear fallout, chemical agents, biological contaminants, wildfire smoke, or industrial toxins, the system must deliver clean, safe air into a sealed environment with zero margin for failure.
Filtration Systems — ARC 450 to Filter Batteries

Scalable Filtration for Large Shelters
CBRN/NBC Filter Battery Systems
CBRN/NBC filter batteries (filter banks) systems are scalable units for large or special requirement shelters and bunkers with airflow up to 18,000 m³/h per one unit. Designed to be connected in parallel for unlimited capacity.
Important Selection Considerations
A CBRN air filtration system is expected to remain on standby for years — possibly decades — without being used, and yet perform flawlessly the moment it's needed.
Unlike most products that degrade with use over time, CBRN filtration must deliver clean, safe air with zero margin for failure against nuclear fallout, chemical agents, biological contaminants, wildfire smoke, or industrial toxins.
Arconik, a trusted global leader in CBRN filtration, produces over 10,000 systems and filters annually and is subject to frequent quality and procedural audits by governments.
Selection should account for shelter air volume, number of people, air changes per hour (ACH), airlocks, generator rooms, air distribution, and leakage.
We recommend contacting us for support in selecting the correct system for your specific shelter. Beside air changes, other parameters include number of people, national or local standards for air volume per person, additional components like airlocks, generator rooms, air distribution, and leakage.




