The 4D7 300 is a whole-house console style humidifier that provides maximum humidification in a contemporary cabinet. The 4D7 300 is capable of servicing a 2700 Sq. Ft. house with an output of 13 gallons per day. This humidifier has an automatic humidistat which allows you to set a target humidity and the unit will maintain the selected humidity. The 4D7 300 has a variable speed motor with a quiet nighttime setting and automatic shut-off. The unit also comes equipped with separate left and right refill bottle indicators with easy-fill dual water bottle with a refill hose. Has a 5.5 gallon total water capacity and uses patented Super Wick 1041. Includes a 2-stage Air Care Filter to help trap airborne impurities and prolongs the life of the Super Wick.