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Wicking paper waterpad
Waterpad that fits: Aprilaire 112, 136, 224, 440, 445, 445A, 448 (12); Chippewa 224, 225, 226; Humid-Aire Neptune; Walton 600, 620, 660. Uses up to 50% less water. Anti-Microbial helps protect filter from the growth and Migration of Mold, Fungus, Algae & Bacteria. For Best Performance, change at least twice per heating season, maybe more depending on water conditions & frequency of use. Made in the USA
BestAir A12W Aprilaire Replacement Paper Furnace Humidifier Water Pad 15" x 2" 11.6" - B000BVPVY8