Mask/Respirator:  (The terms are used interchangeably.) The N-100 respirator  the standard required by the EPA  is disposable and looks like a surgeons mask. Reusable respirators (either full-face or half-mask) are also referred to as masks. They need filters; P100 designates the standard replacement filter. Note: OSHA ®requirements dictate which respirators to wear, and these may differ from those recommended by the EPA.
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