Air ionizers are devices that use ions to purify the air, making it healthier for people to breathe. They work by sending positive and negative ions into the air, which then attach to particles and microbes, neutralizing static electricity and eliminating harmful microorganisms. Unlike regular air purifiers, ionizers don't require filters, so there's no need to buy and change them. The California Air Resources Board has a page listing air purifiers (many of them with ionizers) that meet their indoor ozone limit of 0.050 parts per million.
The CADR measures the amount of filtered air that circulates over a short period of time and was originally designed to qualify media-based air filters. The SARS epidemic in East Asia, including Japan, sparked an increased interest in personal ionizers. Many products have been specialized to contain negative ion generators, such as toothbrushes, refrigerators, air conditioners, air filters and washing machines. The National Health Service (NHS) in Britain investigated the effectiveness of anions for air purification and discovered that repeated acinetobacter infections transmitted through air in a ward were eliminated by installing a negative air ionizer; the infection rate was reduced to zero. There was no consistent influence of positive or negative air ionization on anxiety, mood, relaxation, sleep and comfort measures personal. Overall, air ionizers are a great way to make the air in a room healthier for people to breathe, especially for those with allergies, asthma, and other airway-related illnesses. They can also help reduce the spread of harmful microorganisms.
