The AprilAire 65 Manual Digital Whole-House Wall Mounted Humidifier Control in white is a portable and quiet-operating evaporative humidifier designed for whole-house use. With features like a humidistat and a coverage area for the entire house, this model is both efficient and convenient. Powered by electricity at 24V, this Aprilaire humidifier is made of durable plastic and is ideal for improving indoor air quality in home and garden applications.