The realisation of this project will allow the development of air cleaning devices from chemical, biological or nuclear character pollution. The development of a device implies that an efficient filtering system will be designed to guarantee a high level of air quality. Tested and highly reliable methods to protect against the penetration of contaminated atmospheres shall be applied. The apparatus will primarily be designed to protect smaller spaces, in particular households, located in the vicinity of large contaminants or in addition to infrastructure that links a high degree of risk of environmental incidents with adverse effects on air quality.