An oxygen ionizer is a device that rids the air of dust, pollens, bacteria, and other pollutants. Inside your far infrared sauna, the oxygen ionizer purifies the air by removing allergens, dander, and odors, leaving your infrared sauna air fresh and clean.How do Oxygen Ionizers Work?Oxygen Ionizers work by creating an electrical charge to produce negative ions, which remove tiny partials from the air. The negative ions produced by Oxygen Ionizers seek out positive ions like pollen, bacteria, dust, mold, and so forth to bond. When the positive and negative ions bond, they become heavy dropping to the floor. Over time, you'll notice a build-up of what looks like dust on your sauna floor. This dust can be easily swept into a dust pan and thrown away.JNH infrared saunas are your sanctuary, where healing and relaxation is encouraged. The Oxygen Ionizer ensures you have fresh and clean air for every session.**The Oxygen Ionizer is designed by JNH Lifestyles and works exclusively with our Joyous, Ensi, Pro Series and Tosi Collections. Free UPS/USPS Ground shipping