There is often a lot of confusion around selecting the optimal cartridge filters for dust collectors. For the HVAC industry, MERV (minimum efficiency reporting value) ratings are king. Higher MERV ratings generally signify superior filtration. However, that is not always true for industrial dust filters, which operate in a dynamic environment and work as part of a dust collection system. There is a new test standard to evaluate the performance of dust collection systems - ASHRAE Standard 199. This document explains that standard and the other factors used in selecting dust collection filters and equipment. 


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