The Sun-Pure SP-20C Air Purification system includes multi-stage filtration and PRO-Cell Technology odor and VOC reduction. The SP-20C room purifier includes four stages of filtration to ensure your air is clean. The pre-filter collects particles as small as 5.0 microns*, while two layers of charcoal activated filters remove odors and smoke. The final stage of filtration is a High Efficiency filter that traps tiny microscopic particles as small as 0.3 microns such as dust, dander, and pollen. Bacteria, viruses, mold, and fungi are neutralized by a high output UVC germicidal lamp, and the patented PRO-Cell honeycomb grid magnifies the power of the UV lamp to transform odors, smoke, and volatile organic compounds (VOCs) into fresh healthy air. Sun-Pure Healthy Home System products do not generate ozone like many other products. The fact is, Field Controls’ germicidal lamps convert ozone back into safe, healthy oxygen. Ozone is a toxic gas which can damage the lungs when inhaled. Even low amounts can cause chest pain, coughing, shortness of breath, and throat irritation. Ozone may also worsen chronic respiratory diseases such as asthma and compromise the ability of the body to fight respiratory infections. The Sun-Pure SP-20C covers up to 1000sqft and runs on 120v. The unit comes with a 2 year limited warranty excluding replacement filters and UV light. EPA Establishment Number 59662-CA-001. California CARB G-11-060.