N99

Translingual

Etymology

English N99

Noun

N99

1. A filtration type that efficiently filters out 99% of airborne particulates of 0.3 microns (“μm”) (and all larger particles), but which is not resistant to oils.
2. By extension, filtration standard of 99% of airborne particulates
3. A filter implementing the N99 standard.

Coordinate terms

• P1, P2, P3
• FFP1, FFP2, FFP3

Related terms

• R95, P95, N95
• R99, P99
• R100, P100, N100

English

Etymology

From Initialism of Not resistant to oil particles with 99% filtration efficiency in NIOSH air filtration ratings.

Noun

N99 (countable and uncountable, plural N99s)

1. N99; Ellipsis of NIOSH N99.
   1. (uncountable) N99 standard
   2. (countable) N99 filter

Coordinate terms

• R99, P99 (99% filtration)
• R100, P100, N100 (99.97% filtration)

Related terms

• R95 (oil-resistant filter standard)
• P95 (oil-proof filter standard)