You and your customers will be impressed with the cloud of cool fog wafting through your walk-in humidor. CEZIO plugs directly into the included digital humidistat controller. CEZIO is rated for walk-in humidors sized from 300 sq. ft. up to 800 sq. ft. CEZIO is a direct feed system requiring water that is filtered to remove minerals. CEZIO is fitted for a flexible tubing water line.