DESC: The Model 350 humidifier is completely self-contained. It is designed especially for installation in homes with radiators or baseboard heat. Equally suited for other types of heat, they are sized to fit within closets, heated crawl spaces and basements. These humidifiers have an evaporative capacity of 0.50 gallons per hour and are able to handle a home of up to 4,500 square feet, if the home is tightly constructed.