We’re doing our part to lower the carbon footprint: All our products include Activated Carbon Filters used to absorb materials that are in the gaseous or vaporized state, proving itself to be the most effective means of odor and pollution control. We use only HEPA Technology, none of our products use Ionization technology that releases charged ions into the air and when free ions interact with oxygen molecules in the air that they form Ground-level Ozone. Ozone-free! Not only do our air purifiers not emit ozone, they destroy it.