Aprilaire 360 Humidifier, 120V Whole House,Through Wall, .5 Gallons/hr Air Changes an Hour: 1,100 SQ. FT. loose house: 2; 2,250 SQ. FT. average house: 1; 4,500 SQ. FT. tight house: 1/2 Water Feed Rate: 6 Gallons Per Hour Electrical Data: 120V 60Hz -0.7 AMP