Standards & testing
Effect Of Measuring Method
Why particle count and particle mass tell different stories.
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Filter Technology
Clear answers to the questions behind a good filter choice. Selection, standards, energy and the details that matter in use.
Find your next answer.
10 articles
Standards & testing
EN ISO 14644-1
A reference to airborne particle classification in cleanrooms.
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Comparison of Filter Standards: ISO 16890, EN 779 and MERV
Compare ISO 16890, historical EN 779 classes and the separate MERV system.
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ISO 16890 Standard for Air Filters Used in General Ventilation
An earlier introduction to ISO 16890 classification and filter testing.
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Eurovent Certification: A Guarantee of Performance
An earlier overview of Eurovent certification and filter performance.
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EN1822 and ISO29463: HEPA Filter Tests and Standards
An earlier overview of HEPA test standards and filter classes.
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EN 779:2002 Classification System
A historical reference to EN 779 filter classification.
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HEPA / ULPA Filter Test Systems
The HEPA and ULPA test systems used inside ULPALAB.
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Performance Test System — PTS 5002
How ULPALAB measures filter airflow and initial pressure drop.
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Filter Media Test System — FMT 102
How ULPALAB checks filter media before production.
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