These replacement humidifier water panel filter pads help maintain optimal indoor humidity during dry seasons, improving comfort and helping protect humidity-sensitive items from overly dry air. Built with a heavy-duty aluminum mesh frame designed to hold its shape and a porous ceramic-type coating that absorbs and distributes water to support steady evaporation, each pad measures 10 in x 13 in x 1 3/4 in and is easy to replace by removing the old panel and installing the new one. Replacement for Lennox Healthy Climate 35 X2661; compatible with Lennox Healthy Climate humidifiers HCWB2-17 / HCWB2-17A / HCWB3-17 / HCWB3-17A / HCWB3-17K / HCWB3-17AK / HCWP2-18 / HCWP2-18A / HCWP3-18 / HCWP3-18A / WB2-17 / WB2-17A / WB3-17 / WB3-17A / WP2-18 / WP2-18A / WP3-18 / WP3-18A. Product may arrive in retail or OEM packaging. Disclaimer: This is not an Original Equipment Manufacturer (OEM) product, HQRP branded product is a replacement. All brand names and logos are registered trademarks of their respective owners. Any use of the brand names or model designations for this product are made solely for purposes of demonstrating compatibility.