Replaces Aprilaire: #35, Lennox: 2661, Coleman, Luxaire, Source1, York: S1-HUPAD35 For this reason the pad should be changed once per heating season. Nominal size : 13x10x2 Actual size : 13 x 10 x 1-3/4 The pad is coated with a hydrophilic material that absorbs and holds water flowing through the pad, allowing warm air flowing across the pad to evaporate the water and humidify the air. Lennox X2661 10-Pack - Healthy Climate Replacement Humidifier Water Panel 35 Humidifier Pad 35 Replacement Discount OEM Healthy Climate Solutions Humidifier Pads 3-pack Humidifier Filter Pads Replaces Aprilaire Models: 350, 360, 560, 560A, 568, 600, 600A, 600K, 600M, 600MK, 700, 700A, 700M, 760, 760A, 768 Lennox Healthy Climate Humidifier Pad # 35 Part No. X2661 - 3Pack Actual Size: 10″ x 13″ x 1 3/4″ Genuine product by Lennox Corporation Manufactured In North America Hcwb3-17 Compare and review the 10 best Lennox Healthy Climate Humidifier Pad 35 Part No X2661 for 2026 at . Find top-rated picks with detailed insights to help you choose the perfect one for you