HQRP Water Filter Replacement for Totaline P110-3545 PREMIUM QUALITY The heavy-duty aluminum mesh frame holds its shape over the life of the water panel as the porous ceramic-type coating absorbs water and maintains the proper level of hydration to support the evaporation process. Dimensions: 10" x 13" x 1 3/4". COMPATIBILITY Replacement for Totaline P110-3545. Сompatible with Totaline P110-LBP2217, P110-LBP2317, P110-LBP2417, P110-LFP1218, P110-LFP1318 Humidifiers. Сompatible with Lennox WB217, WP218, HCWB2-17, HCWP2-18 Humidifiers. EASY REPLACEMENT For optimum performance, panel should be replaced annually. Please note, changing the panel slide the water panel into the scale control insert with the colored marker up. HQRP Humidifier Water Filter produces better air quality by maintaining optimal humidity levels during dry seasons.