Profile: Filtration Mfg., Inc. offer air filters. A+2000 permanent electrostatic air filter is designed to provide a balance between airflow and filtration. A filter's resistance to airflow will increase as it captures particles. It is constructed using space age plastics that will not deteriorate, degrade, oxidize or corrode. Its patented 4 stage loading design allows particles to be captured in the interior of the filter, eliminating the consequences of face loading. It is available in ¾, 1, 2 & 5" depths. We also provide A+H2O water filters and cartridges.