Abstract
Fresh air is essential for humans’ physical and mental health, and it helps us relaxed and relieve stress. Air ionizers can remove harmful gases in the air and absorb suspended particles in the air, especially various bacteria and viruses. This report investigates the nature and working principles of air ionizers and discusses their application in the indoor environment and the protection of human exposure. We used the ozone emission test, particle removal rate and clean air delivery rate to analyze the effectiveness of four selected air ionizers. Simultaneously, this report identifies the side effects of air ionizers and advice more further studies about air ionizers before promoting them into daily-life use.
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