MAF BOX FILTERS are heavy duty filters that were developed for long lasting performance in rotating machinery and a myriad of other applications. The deep pleat design with separators extend the filtration surface area of the filters, at the same time ensuring optimal airflow through the filter for stabilization, bringing lower differential pressure performances over time. It also has a hydrophobic treatment option for locations with high water and moisture content. The box filter comes with three header and material options that fit site installation configurations.