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The European Standard EN149 FFP1 is the rough U.S. equivalent of the N95 NIOSH rating. There is some disconnect since changes to the EU filtration standard are no long based on a most penetrating particle size of 0.3 microns (as in the U.S.) but instead use the smaller 0.25 micron standard.

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Where there is potential for exposure to tetrafluoromethane, use a NIOSH/MSHA or European Standard EN149 approved supplied air respirator with a full face piece operated in the positive pressure mode, or with a full face piece, hood, or helmet in the continuous flow mode; or use a NIOSH/MSHA or European Standard EN149 approved self contained