Hardened provides a range of ventilation and Chemical, Biological, Radiological, and Nuclear (CBRN) air filtration systems, carbon dioxide (CO2) and carbon monoxide (CO) removal systems, scrubbers, oxygen (O2) supply systems and associated components.

For civil defense shelters, private bunkers, hospitals, dangerous goods facilities and other protected environments, these systems offer maximum protection against radiation, harmful gases, toxins and particulates. The systems ensure supply of filtered, breathable air even in the most hazardous conditions.