A:Answer Hi Tom. Thank you for your interest in Blueair. Our Blueair air purifiers meet CARB standards and are third-party certified to Intertek's Zero Ozone standards. Our HEPASilent™ technology combines mechanical and electrostatic filtration to capture and remove indoor air pollutants. It uses an ionizer to electrostatically charge particles at low current, boosting filter efficiency and achieving a quiet, energy-efficient Clean Air Delivery Rate (CADR). Find out more on our website: https://www.blueair.com/us/air-purifiers-and-ozone.html Your Blue Pure 411a Max and all Blue Pure Max air purifiers utilize a power cable to plug directly into an electrical outlet. I hope this information is helpful. If you have any other questions, please feel free to reach out at https://www.blueair.com/us/contact-us-page.html
