EN 149 is a European standard for testing and marking requirements for filtering half masks. Such masks cover the nose, mouth, and chin and may be inhalation and / or exhalation valves. EN 149 defines three classes of such half particle masks, which are called FFP1, FFP2 and FFP3 (FFP = Filtering Facepiece) according to their filtering efficiency.
What do the letters on the masks mean?
NR Mark refers to one-time use of masks. (Not reusable) The R Mark indicates that masks can be used more than once. (Reusable, more than once) This type of mechanical filter respirators protect against the inhalation of particles such as dust particles, droplets and aerosols.
Same mask different names? What does KN95, N95, FFP2 refer to?
Almost the same tests (but different markings) are used in Australia, New Zealand, Korea, and Brazil. Similar standards are used in the United States, China, and Japan.
For example, EN 149 FFP2 masks have similar performance requirements as N95 masks in the USA and KN95 filters in China, and EN 149 FFP3 masks have similar performance requirements as N99 masks in the USA. However, the test requirements of EN 149 are slightly different from the US / China / Japan standards: EN 149 requires an additional paraffin oil aerosol test and tests at a variety of different flow rates and defines several associated and allowable pressure drop levels.