International Filtration News provides ongoing coverage of HVAC/HEPA/ULPA applications and technology. Visit filtnews.com regularly to stay on top of the latest insights, issues and innovations in HVAC/HEPA/ULPA filtration.
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HEPA and ULPA filters have been in use around the world for many years. The first HEPA filter was developed in the late 1940s. The original procedures to test these filters were also developed around the same time. Although these original test procedures are still practiced in the U.S.