Promotes Cleaner Air: Reduces the release of white dust from the minerals in tap water, which is commonly associated with filterless humidifiers Relief for Allergies: Traps airborne allergens like dust, pet dander, and smoke. Coated with an antibacterial agent to prevent the growth of bacteria to prolong the filter life and reduce odors. Installs in Seconds: Fits perfectly inside the water tank for quick and easy installation and removal Maximizes Performance: Keeps the MistAire Eva 4-Speed Evaporative Humidifier (Model: PEHUMEVA) operating at maximum efficiency Long-Lasting: Lasts up to 6 months with normal daily use Our antibacterial replacement filter is designed to work with the MistAire Eva 4-Speed Evaporative Humidifier and will keep your unit operating at maximum efficiency. Replace every six months for optimal performance.