ABSTRACT
This chapter discusses the basic principles of selection and use of filtering respiratory protective devices designed to protect against nanoparticles. A guide for the risk assessment of these devices in relation to the concentration of harmful substances in the air, the occupational exposure limit (OEL) and/or derived no-effect level (DNEL) values, the exposure time and the protection class of the respiratory protective devices is included. The subsequent part of this chapter is devoted to nonoccupational hazards, with particular emphasis on smog. Then, the basic principles of using respiratory protective devices, the manner of conducting technical inspection and the principles of supervision of the above-mentioned devices are described. The most common damages to the most important components of filtering respiratory protective devices are illustrated.
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