4-Pack Humidifier Demineralization Cartridge Compatible with Dreo Humidifiers HM306,HM311/311S,HM524/524S,HM409S,Prevents Hard Water Build-Up | Filters Mineral Deposits | Eliminate White Dust

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About This Compatible Models：Our demineralization cartridge is only compatible with the Dreo humidifier models HM306, HM311/311S, HM524/524S, HM409S 3-Layer Filtration System：The o uter layer adsorbs impurities; the ion-exchange resin in the middle layer filters heavy minerals, such as calcium and magnesium ions; and the inner layer traps additional impurities before the water is released Efficient Purification：The demineralization cartridge filters hard water, preventing the formation of scale and white dust for a more comfortable humidification experience; it also improves humidifier efficiency and extends humidifier life Replacement Cycle：For a better experience, we recommend that you replace the mineral cartridge about once a month - a single cartridge can purify up to 40 gallons of water - depending on your water quality Buy with Confidence：Our products are made of high quality materials, so I have confidence in our products and you can buy with confidence. Package includes 4 filter cartridges Show more