The healhty humidifier plus 2.5 gallon. Hunter humidifier needs no filter replacement.
Permawick filter needs no regular maintenance , simply clean once a year.
Patented triple antibacterial SafeSystem provides protection against bacteria, mold and spores. Output for rooms up to 1350 square feet. Automatic shutoff keeps tank from overflowing. Adjustable humidistat to regulate dryness. One year warranty.