The Daikin 4023376 is a washable replacement air filter designed for use in select Daikin indoor mini split units that requires annual replacement. It's a direct replacement for the standard air filter included with the following Daikin ductless systems: CTX Series CTX07AXVJU, CTX09AXVJU, CTX12AXVJU FTK Series FTK09AXVJU, FTK09BXVJU, FTK12AXVJU, FTK12BXVJU, FTKA20BV1H, FTKA25AV1H, FTKA25BV1H, FTKA35AV1H, FTKA35BV1H FTFK Series FTFK35AV1, FTFK35AVL, FTFK50AV1, FTFK50AVL FTKH Series FTKH25AV1, FTKH35AV1, FTKH50AV1 FTKU Series FTKU25AV1, FTKU35AV1, FTKU50AV1 FTX Series FTX09AXVJU, FTX09BXVJU, FTX12AXVJU, FTX12BXVJU, FTXA25AV1H, FTXA25BV1H, FTXA35AV1H, FTXA35BV1H ATXC Series ATXC20BV1B, ATXC25BV1B, ATXC35BV1B, ATXC50BV1B FTXB Series FTXB09BXVJU, FTXB12BXVJU FTXC Series FTXC20BV1B, FTXC25BV1B, FTXC35BV1B, FTXC50BV1B FTXNG Series FTXNG12AXVJU, FTXNG09AXVJU Each wall unit requires two filters. Filter Dimensions: 11-7/8" x 14" Maintenance & Care Instructions Cleaning Frequency: Vacuum the filter gently with a soft-bristle brush every two weeks. When visibly dirty, wash with a mild detergent in lukewarm water to remove dust and buildup. Drying: Allow the filter to dry completely in the shade before reinstalling. Avoid direct sunlight or high heat. Do not operate your mini split system while the filter is removed or drying, as this can allow dust to enter the unit and cause internal buildup or mold growth. Replacement: With regular cleaning, the filter can be reused for an extended period. For best performance, replace it annually—or sooner if it shows signs of wear, damage, or cannot be fully cleaned after washing. One pack contains two (2) filters.
