Depending on the size of the room, the ozone generator must operate for at least 3 to 10 hours. For an entire home, at least 25-30 hours of continuous operation are required to remove most contaminants. People use ionizers to remove small particles from the air and improve indoor air quality. Ionizers cannot remove large particles, such as those that cause asthma and allergies.
They can also emit ozone, a colorless gas that causes lung irritation. Fanless air ionizers are quiet and energy efficient. However, a fanless ionizer doesn't circulate air as quickly, so it may take longer to purify a room. Ionizers are very effective at removing particles (PM) from the air and some particles from the surface.
On their own, ionizers produce too much ozone and can be harmful to human health. While some manufacturers claim that the ozone produced by an ionizer is the same amount found in outdoor smog, they are often found to produce even higher ozone levels.
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