An air purifier eliminates residue and allergens from air.A humidifier add water fumes in air to humidify the dry air. Purifiers Vs Humidifiers An air purifier deals with air channel innovation that utilizes a fan to suck in the air in your home and afterward channel it utilizing an extraordinary filter.A humidifier is a piece of hardware that utilizes a fan or warming component to produce water fume into the dry cools.