Recommended Guidance for Extended Use and Limited Reuse of N95 Filtering Facepiece Respirators in Healthcare Settings Rules and Regulations 4.7 (3) Recommended practices for extended use and limited reuse of certified N95 filtering facepiece respirators. Review the Information from the National Institute for Occupational Safety and Health How useful was this post? Click on a star to rate it! Submit Rating Average rating 4.7 / 5. Vote count: 3 No votes so far! Be the first to rate this post.