Standards & testing
Why E10, E11 and E12 Filters Ship Without a Scan Test
Understand why E10–E12 classification does not carry the HEPA local scan requirement, and request the performance evidence appropriate to the filter.
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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.
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13 articles
Standards & testing
Does a HEPA Filter Need CE Marking? Start With the Product, Not the Certificate
Start with the supplied product and its intended use to separate filtration evidence from the conformity requirements for powered equipment.
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How to Read a HEPA Filter Test Certificate, Line by Line
Read serial numbers, airflow, MPPS and local results in the right order, with an illustrative H14 report to explain common mistakes.
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Effect Of Measuring Method
Why particle count and particle mass tell different stories.
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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: Verified 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 779:2012 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A historical reference to EN 779 filter classification.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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