Honeywell, Easy To Care Cool Mist Humidifier, For Medium Size Rooms, Easy To Fill, Easy To Use, Easy To Clean, Patented Easy To Fill Technology Makes Filling As Easy As Watering A Plant, Convenient Easy To Use Features Make Operating A Snap, 2 Moisture Control Settings For Optimal Comfort, Antimicrobial Treated Filter, Easy To Clean, Easy Wipe Surfaces, Quietly Runs 36 Hours On 1 Filling, 3 Year Limited Warranty. Replacement Filter HAC-504AW – T.V. #661793