Below is a list of Filtration Products manufacturers from Harvard, Massachusetts. Filtration products are used in a number of industrial, commercial and consumer applications to reduce or eliminate unwanted particulates from a fluid or gaseous process flow. These items are widely available and include both the filter media and housing assemblies used to hold them in place. Often the word filter may refer to the holding apparatus alone while media is specific to the material barrier used to trap, collect or dissolve impurities.