The PerfectPleat HC filter is designed to consistently increase efficiency throughout the service life of the filter. The PerfectPleat HC filter has approximately 25% more media than our standard capacity filter, and is ideal for applications where pleated filters are currently in use and higher performance is desired. It has an initial G4 rating respectively, but the efficiency increases significantly when dust holding begins. PerfectPleat HC filters have distinctive self-supporting characteristics that allow a pleating pattern, which promotes airflow and maximises dust holding capacity (DHC). Lower pressure drop and higher DHC translate into reductions in energy consumption and operating costs.