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Total Inward Leakage (TIL) - FY07

NOTE: This page is archived for historical purposes and is no longer being maintained or updated.
Current Information can be found at: Total Inward Leakage (TIL) - FY08


  • Establish TIL testing capability and performance requirements for testing respirators for inclusion in 42 CFR Part 84.
Testing with Portacount

Applicable Standards

  • 42 CFR Part 84

Key Partners

  • Respirator Manufacturers


  • OSHA
  • Manufacturers
  • Employers
  • Labor Unions
  • Respirator Users

Project Scope

  • Establish TIL requirements for half-mask respirators
  • Establish TIL requirements for all respirator classes


  • 1Q FY07 - Complete Benchmark State of the art testing for 101 current respirators
  • 2Q FY07 - Analyze data and develop proposed criteria for testing and certification
  • 3Q FY07 - Hold public meeting to present proposed certification criteria
  • 4Q FY07 - Establish TIL requirement


  • TIL performance requirements for testing and certification in 42 CFR Part 84
  • Final rule


  • PPE designs that result in better overall fitting respirators for general industrial workers, healthcare workers and emergency responders.
Page last modified: July 23, 2007
Page last reviewed: July 23, 2007 (archived document)
Content Source: National Institute for Occupational Safety and Health (NIOSH)