Furnace Humidifier, Fan Powered, Height (In.) 16-3/4, Width (In.) 15-1/2, Depth (In.) 10-3/8, Plenum Opening Required (in.) 14-1/16H x 13-1/2W, Max. Water Usage (Gal./24 Hrs.) 18, Continuous Drain, Color Gray, Includes Automatic Damper, Status, Maintenance, Service LEDs