Categories of Face Mask (EN149:2001)

 

Categorisation of filter respiratory protective equipment (face masks) is defined in British Standard EN149:2001+A1:2009. 

Class

Max permitted 

Total Inward

Leakage (TIL)

Max Filter Penetration Min filter efficiency Nominal Protection Factor

 

Assigned

Protection Factor (APF)

FFP1 22% 20 80% 4.5 4
FFP2 8% 6 94% 12.5 10
FFP3 2% 1 99% 50 20

 

Source: UK Health and Safety Executive