Bionaire BCM657-U Digital Cool-Mist Tower Humidifier with Permanent Filter Cool-mist humidifier designed for medium-size rooms Adjusts to reach and maintain selected humidity level Digital comfort control; full tank emits moisture for up to 36 hours PERMAtech reusable washable filter; dishwasher-safe base Measures 11-1/2 by 10-1/5 by 25-1/5 inches