CDC logoSafer Healthier People CDC HomeCDC SearchCDC Health Topics A-Z
NIOSH - National Institute for Occupational Safety and Health

Skip navigation links Search NIOSH  |  NIOSH Home  |  NIOSH Topics  |  Site Index  |  Databases and Information Resources  |  NIOSH Products  |  Contact Us

Total Inward Leakage (TIL) Other Classes of Respirator - FY12

NOTE: This page is archived for historical purposes and is no longer being maintained or updated.


  • Establish TIL testing capability and performance requirements for testing air purifying and supplied air respirators for inclusion in 42 CFR Part 84.

Applicable Standards

  • 42 CFR Part 84
  • OSHA
  • DOE
  • ISO

Key Partners

  • Respirator Manufacturers


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

Project Scope

  • Establish TIL requirements for all respirator classes


  • Q2 Finalize/approve IL chambersí design documents
  • Q3 Install IL Benchmark Test Facility; validate corn oil challenge agent equipment/instruments
  • Q4 Initiate benchmark IL evaluations


  • 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 updated: April 17, 2012
Page last reviewed: April 17, 2012
Content Source: National Institute for Occupational Safety and Health (NIOSH)
National Personal Protective Technology Laboratory