TrueSTEAM 12-gallon humidifier with VisionPRO IAQ comfort system. Steam provides the highest and most consistent levels of humidity. Mount directly to the duct or remotely up to 20 feet away in tight-fitting or unconditioned air spaces. Installs in minutes; limited duct cutting and bracket-mount design means installation takes less than five minutes to complete. Easy maintenance. Self-regulates cleaning cycles throughout the year. Annual maintenance requires no tools to access and clean. Five-year warranty. Temperature range: 1.1C-40C. Includes humidifier, VisionPRO IAQ control, duct template hardware, saddle valve, drain supply water tubing, duct nozzle, mounting bracket, water filter, backflow valve.