Vornado Evaporative Humidifier Wick Filters, 2-Pack are designed with high-quality materials to absorb the maximum amount of water while effectively filtering the air circulating through your humidifier. These disposable filters eliminate the need for cleaning and should be replaced every 4 to 8 weeks depending on usage. Specifically made to fit select Vornado evaporative humidifier models, these filters ensure optimal performance by matching the required height, width, thickness, and material specifications. Compatible with Models Evap1, Evap2, Evap3, and Evap40, each pack contains two individual filters measuring 1.5 inches wide by 7.5 inches high by 9.5 inches long. Model Number: