What are the three levels of filters used in respiratory protection?

The three levels of filters used in respiratory protection are categorized as N-Series, R-Series, and P-Series. This classification is essential because it helps users select the appropriate type of respirator based on the specific airborne contaminants they may encounter.

N-Series filters are designed for environments free of oil mist, as they do not retain their filter efficiency when exposed to such substances. R-Series filters are somewhat versatile, as they can handle some oil mist exposure for a limited time while still maintaining their filter performance. P-Series filters are meant for environments with oil mist and provide a higher level of protection, as they can be used for extended periods without losing their effectiveness.

This categorization allows for effective selection based on the anticipated use conditions, ensuring adequate respiratory protection against particulates, whether oily or non-oily. Understanding these categories is vital for those involved in asbestos abatement and similar environments, where air quality and particulate safety are paramount.