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Filtration articles
Filtration context pages for teams comparing filter media, room air cleaners, gas-phase removal, and claim-support study designs.
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Filtration
Filter ratings, gas-phase removal, room-air-cleaner claims, and performance terminology.
Gas-Phase / VOC FiltrationGas-phase and VOC filtration is not the same decision as particle filtration. The useful test path depends on the target gas, media chemistry, device geometry, airflow, humidity, and whether the claim is removal, capacity, CADR, or by-product control.HEPA vs. ULPA FiltersHEPA and ULPA are not interchangeable labels. For cleanrooms, semiconductor wafer manufacturing, and high-efficiency air-treatment devices, the useful question is what particle-size range, airflow, fixture, pressure drop, and acceptance endpoint the test actually measures.MERV Ratings ExplainedMERV is useful shorthand for HVAC filter performance, but it is not the whole test result. A defensible filtration plan still has to name the standard, particle-size range, airflow, pressure drop, sample configuration, and whether the claim needs work below the MERV particle band.