Replacement humidifier filter (set of 2) compatible with Sharp humidifiers, "compatible product" Filter compatible models: HV-FY5. This product is also equivalent to HV-FS5. Humidifying filter antibacterial and anti-mold method: Antibacterial and anti-mold agents are impregnated into the filter to suppress the growth of bacteria and mold in the tray. Replacement period (1 filter): Approximately 2 years. The replacement time may be earlier depending on the water quality and usage environment. 03812h60