R99

Translingual

Etymology

English R99

Noun

R99

1. A filtration type that efficiently filters out 99% of airborne particulates of 0.3 microns (“μm”) (and all larger particles) and is somewhat resistant to oil.
2. A filter implementing the R99 standard.

Coordinate terms

• P1, P2, P3
• FFP1, FFP2, FFP3

Related terms

• R95, P95, N95
• P99, N99
• R100, P100, N100

English

Etymology

From Initialism of Resistant to oil particles with 99% filtration efficiency in NIOSH air filtration ratings.

Noun

R99 (countable and uncountable, plural R99s)

1. R99; Ellipsis of NIOSH R99.
   1. (uncountable) R99 standard
   2. (countable) R99 filter

Coordinate terms

• R100, P100, N100 (99.97% filtration)

Related terms

• N99 (non-oil-resistant filter standard)
• P99 (oil-proof filter standard)