Filter Testing

Air Techniques International Filter Test Laboratory

The Air Techniques International Filter Test Laboratory (ATI-FTL) offers comprehensive testing of flat sheet filter media and most HEPA and ULPA filter configurations.  The ATI-FTL is a U.S. Department of Energy (DOE) audited facility, inspecting and testing filters for DOE and other government and commercial customers, and is ISO 9001 registered.

Standard Testing Services

  • Flat Sheet Filter Media
    • Mil-Std 282
    • IEST RP-CC-021
  • HEPA Filters
    • Mil-Std 282
    • DOE 3020
    • ASME AG-1
    • IEST RP-CC-007

Please note: While ATI manufactures the 100Xs for testing N95 masks, we do not provide a commercial service for testing N95 masks.


Filters are challenged with a test aerosol at rated flow, media to specified face velocity. The mass concentration of challenge particles downstream of the filter or media is measured and evaluated against the measured upstream mass concentration resulting in a percent penetration, the inverse of efficiency. Concurrent with the percent penetration, the pressure drop across the product under test is also measured. These measurements are performed in either an instantaneous or load based fashion, per test standard requirements.


Test reports are provided electronically and hard copy can be mailed, if required.  All data is considered confidential in nature and maintained and treated as such.

Air Techniques International
Filter Test Laboratory
A division of Hamilton Associates, Inc.
1708 Whitehead Road, Suite 104
Baltimore, MD 21207
Tel: 410-277-8981
Fax: 410-277-3444

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