Air purifiers remove contaminants and irritants from indoor air using one of two general techniques:
– Active purification, which uses a process known as ionization to convert chemicals and gases into harmless molecules. This process does not remove contaminants, which makes it somewhat inefficient compared to passive purification.
– Passive purification, which removes pollutants from the air using a filtration system. This is considered the more efficient system since contaminants are permanently removed from the air, rather than converted.