Ionic Refrigerator Air Purifier and Freshener - Air Innovations. AIR PURIFIER : Cleans and purifies the air inside of your refrigerator or cooler. PRODUCE : Produces safe levels of ozone every hour. COMPACT : Compact size, whisper quiet operation. BATTERY : Operates on 4 "C" batteries (not included) SIZE : Overall dimensions of the unit are 16"H x 5"W x 7"D.