The Fujitsu 9387473032 (Old Part# 9387473001) is the OEM Fujitsu Replacement filter for select indoor units. This Fujitsu mini split filter is treated during manufacturing to prevent mold growth. This feature on the filters gives you cleaner, healthier air inside your home, and the coating makes it easier to clean your air filter. Maintenance & Care: Fujitsu recommends cleaning the air filter in warm water with a mild soap mix or vacuum cleaner to remove the airborne dust and pollutants collected. After washing the filter, it must be thoroughly air-dried before it can be placed back in the indoor unit. The filter should be cleaned every two weeks and replaced annually to ensure the best air-cleaning performance. Filter Dimensions: 12-1/2" x 12-9/16" Two (2) 9387473032 filters are included with this offer.