Product Information:About The Aprilaire 400M 120V HangMount WholeHouse HumidifierThe Aprilaire 400M 24V WholeHouse Humidifier utilizes a unique evaporative technology that reduces the water usage by passing through the built in bypass damper. During the water processing the water is naturally pulled down by gravity while at the same time the water panel draws the water back to the top allowing the Aprilaire 400M 24V WholeHouse Humidifier to use 100 of the water that is delivered to the unit. The Aprilaire 400M 24V WholeHouse Humidifier can help to solve common house issues such as chipping paint/plaster, splitting/cracked wood floors, splitting/cracked wood furniture, splitting/cracked trim and molding. The Aprilaire 400M 24V WholeHouse Humidifier can also help with many health issues such as sore throats, cry nose, cracked/itchy skin, allergies and asthma symptoms. The Aprilaire 400M 24V WholeHouse Humidifier includes a builtin bypass damper, saddle valve, one water panel, 24 volt transformer, manual humidifier control and the installation sheet.Highly Efficient For Better ResultsBy evaporating up to 0.7 gallons of water per hour, you will never have to experience the discomfort of dry air again Best of all, the wide ranging effects of this humidifier can reach every room in a wellconstructed home of up to 4,000 square feet If you worry about water conservation or live in a region where standing water is a problem, donrsquo;t wait another day to get the Aprilaire 400M Humidifier. This great humidifier not only recycles water cleanly into the air, but can help eliminate water where draining is not available.Benefits for Your Home amp; Your HealthBy maintaining an optimal level of humidity you can ensure proper respiratory health, and avoid expensive repairs on parts of your home that can be affected by dry weather, parts such as weather stripping, molding, paint, etc.