Sharp makes an excellent line of air filters. Parts, however, do need to be replaced fare more often than officially recommended. Parts can be found at the website, here. Below is a translation of part listings based on the KC500Y model, many of which are usable with other models.
|Part||Part (in Japanese)||Model Number||List Price||Comments|
|HEPA Filter||集じんフィルター（HEPAフィルター）||FZ-BX50HF||4,400円||Change every 10 years|
|Charcoal Odor Filter||脱臭フィルター||FZ-B50DF||4,000円||Change every 10 years|
|Pre-Filter||使い捨てプレフィルター（6枚入り）||FZ-PF70K1||800円||Change every month|
|Pet Odor Filter||ペット用脱臭フィルター||FZ-DF50K1||2,000円||Change every 2 years|
|Kitchen Odor Filter||キッチン用脱臭フィルター||FZ-KF50K1||2,000円||Change every 2 years|
|Silver Ion Water Tank Cartridge||Ag+イオンカートリッジ||FZ-AG01K1||900円||Change every year|
|Water Evaporator Filter||加湿フィルター||FZ-Y80MF||2,600円||Change every 10 years|
|Water Tank for White Model||タンク||2804210068||2,000円|
|Water Tank for Black Model||タンク||2804210069||2,600円|
|Water Tank Cap||タンクキャップ||2803120012||1,200円|
|Evaporator Filter Enclosure Backplate||フィルターオサエ||2802140115||1,000円|
|Evaporator Filter Enclosure||フィルターワク||2801380018||1,400円|
|Evaporator Filter Magnet||磁石||2023730002||600円||Magnet replacement method|
Filters tend to get smelly with use. The HEPA and odor filters will need to be replaced every two to three years, depending on use and environment. Dusty or humid locations will need replacement more quickly.
Water evaporator filters are good for less than two years, unless strict cleaning regimens are followed. Cleaning can be done with acids to remove mineral deposits and bleach to kill fungus, but it may be easier to simply replace these filters with third-party filters that are of lower quality but similar performance.
Parts can be found on Amazon or other retailers for far less than list price, especially if buying from a third-party supplier.