Space-Gard Part # 401 MERV 10 for Model 2400 High Efficiency Air. Package of 2 20x20x1 York / Source1 Humidifier Pad

York / Source1 Humidifier Pad Part # S1-HUPAD12

These parts are not returnable if plastic packaging is opened

trying to remove the bulb by sliding up or down through the cardboard frame will break the bulb

Lennox X2660 Humidifier Pad #10 / Water Panel

Five Seasons FSHEPA-DM400

Space-Gard Part # 401 MERV 10 for Model 2400 High Efficiency Air. Package of 2 20x20x1 York / Source1 Humidifier PadGenuine Original Space Gard Stock Part Model No. 401 for Space Gard Aprilaire Model 2400 High Efficiency Air Cleaner Dimensions: 16 inches x 27 inches x 6 inches Package of 2 You can Upgrade this filter system using the Aprilaire Part # 1413 Upgrade Kit