GeneralAire 990-13 (6-Pack) – Vapor Pad for Legacy Models 1137, 1040, and 1042 Series; SL16, 709, and 990

• Fits: GeneralAire® Legacy Models 1137, 1040, and 1042 Series; SL16, 709, and 990.• Fits: Trion G100, G300 and Herrmidifer 100; Protech 84-25054-01 and 84-25054-05.• 1.5 X 9.75 X 12Your Vapor Pad® is constructed using an expanded aluminum base, coated with a hydrophillic material that absorbs water. As warm air from your furnace passes through the Vapor Pad®, the water contained in the coating evaporates to provide your home with humidity. Over time, water deposits build up on the Vapor Pad®, preventing warm air from passing through. If you wash the Vapor Pad® in an attempt to remove the deposits, you’ll also wash off the hydrophillic coating. Your humidifier is then unable to provide humidity to your home. Replace every year.GeneralAire 990-13 (6-Pack) – Vapor Pad for Legacy Models 1137, 1040, and 1042 Series; SL16, 709, and 990