A safe and effective combination of UV and ozone

UVC radiation and ozone are known to be effective sanitizing agents. Therefore, they have been proposed in many applications during the pandemic outbreak since they are exempt from the storage, transportation and waste disposal drawbacks of chemical agents. However, both are effective on SARS-COV 2 at levels dangerous for humans. This work shows a portable device designed to treat the indoor environment with an ozone concentration where rise time, treatment value, and cleaning time are carefully controlled and traced not to harm people. When persons are present, the environmental air can be treated with UVC in an enclosed duct without exposure to harmful radiation. The UV source geometry and the duct’s inner surface are designed to maximize the radiation dose delivered to the flowing air, allowing a valuable airflow. The combination of UVC and ozone in a single device enables to safely and effectively treat the air and surfaces of an environment and optimize the treatment times.