Tag: Filter Testing
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Electrostatic Discharge (ESD) and 16890 Efficiency Test Without ESD
Synthetic filter media often relies on an electrostatic charge to reach the efficiency printed on its label. That charge fades in service. ISO 16890 deals with this by testing the filter again after the charge has been removed, and the discharged result is the number worth trusting. Below is where the charge comes from, why…
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HEPA FILTER FACTORY TESTING STANDARDS- EN 1822 AND ISO 29463
Comparison between EN 1822 and ISO 29463 Before reading this article you can find more information about the EN1822 standard here.Before reading this article you can find more information about the ISO 29463 standard here. EN 1822 and ISO 29463 are two international standards related to air filtration, specifically focusing on high-efficiency particulate air (HEPA)…
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Understanding ISO 29463 Standard – High efficiency filters and filter media for removing particles from air
ISO 29463 is a series of international standards developed by the International Organization for Standardization (ISO) to address the testing, classification, and marking of high efficiency air filters. Published as a common language for testing and classifying high efficiency filters worldwide, including Europe and America, the ISO 29463 standard aims to harmonize and streamline filtration…
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Filter Face Velocity and Its Impact on Performance
Face velocity is the air speed through the face of the filter, and it decides more about how a filter behaves than most datasheets admit. Push it up and the pressure drop rises, capture of the finest particles falls, and the media pack takes mechanical strain. Push it down and you need more filtration area…
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Dust Holding Capacity in Air Filters
Dust holding capacity (DHC) is a critical attribute of air filters that determines their overall performance and operational life. The ability of an air filter to retain particulate matter significantly affects the quality of indoor and outdoor air, as well as energy consumption in ventilation systems. Below is what DHC measures, why it drives filter…