AprilAire helps make your home a Healthy Air environment with the Model 865 34.6 gal. Steam Humidifier. This high-capacity, whole-house humidifier is designed for homes up to 10,300 sq. ft., delivering optimal relative humidity to homes in arid climates with special humidity requirements for wood floors, humidity-sensitive furnishings, large floor plans, or short furnace run times. Plus, the humidity capacity is adjustable from 11.5 - 34.6 gal. per day, making this unit suitable for a variety of home sizes and regions. The manual digital control works to continuously monitor your home's relative humidity, turning on and off the humidifier as needed. While balanced humidity exists between 40 - 60%, it's important to remember that outdoor temperature and other home factors will impact what relative humidity level is attainable and recommended for your house. You'll enjoy balanced humidity thanks to electrode technology, which passes an electrical current through water to boil it and generate steam before sending this humidified air into your home. This process happens inside the included steam canister, which should be replaced annually for optimal performance. The Model 800 Steam Humidifier includes a 5-year warranty and it's designed and assembled in the USA utilizing US and global components, meaning you can buy with confidence. Color: Grays.