Compared to standard, it features enhanced layered filtration that deeply purifies water and minimizes scale formation Maintains strong filtering even after prolonged use With up to 90% filtration efficiency, it effectively removes minerals and impurities from water, reducing scale buildup inside your humidifier and extending its life Each filter lasts approximately 3 months depending on water and usage frequency Suitable for especially in dry season or air conditioned spaces, this humidifier filter helps relieve dry skin and respiratory discomfort, creating a comfortable living or working environment Designed exclusively for HFT600, HEV615 and HEV620 humidifiers, this replacement filter ensuring clean, moist air while maintaining your humidifier ' s efficiency Selected from fiber with excellent breathability, this filter ensuring humidified air Easy installation for quick replacement