The Vornado company specializes in home comfort and air flow products such as heaters, purifiers, and humidifiers. Their humidifier units are known for their durability and streamlined appearance. These systems provide stable humidification throughout the room or area that they are used in. They require the use of humidifier filters to maintain efficient operation and allow for uniform distribution of moisture into the air. Recommended change time for your humidifier pads is every 2 months.