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

Compatible ModelsOur demineralization cartridge is only compatible with the Dreo humidifier models HM306, HM311/311S, HM524/524S, HM409S | 3-Layer Filtration SystemThe outer 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 PurificationThe 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 CycleFor 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 ConfidenceOur 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