Electrostatic Precipitator: Uses electrostatic force to capture and hold dust and other particles in the air. Electric charge removes impurities in the air such as exhaust, mold spores and viruses Comprehensive 4-Stage Filtration: This HEPA air purifier utilizes a 4-stage filtration system, including an Ozone filter to keep ozone emissions and other airborne particles out of your home Large Area Coverage: With 2,520 sq. ft. coverage (based on 5 air changes per hour), our HEPA air purifiers with UV-LED technology are perfect for large homes, offices and commercial spaces Anion and UV-LED Function: Our ionic air purifier emits negative ions, attaching to dust and creating a fresher atmosphere while UV lighting kills organisms for a healthier environment Replacement Filters Available: Large air purifier features a filter indicator light to alert when the 4-stage Carbon and HEPA filter needs to be replaced. Each filter lasts up to 2,160 hours