White paper water pad furnace humidifier water panels feature higher absorption and output. Features a microfree anti-microbial treated surface. Fits Aprilaire 110, 220, 500, 500A, 550, 550A, 558, CHIPPEWA 200. Fits Honeywell HE220A, 220B, 225A, 225B. Fits Lasko 5000L, 5000EC, 6000. Fits Hamilton 12HF. Fits Lennox WB212. Humidifier Type: Furnace Dimensions: 1-1/2 In. x 9-1/2 In. x 10 In. Model Compatibility: Aprilaire, Honeywell, Lasko & More