What's the difference between air purifiers and air sterilisers?
Air purifiers are designed to remove impurities from the air and capture them mechanically within its filter. Sterilisers, like those found in the Sayoli range, actively eliminate pathogens from the air without removing any matter.
In purifiers, a much important feature is their throughput, that is the amount of air pushed out of the device. In sterilisers, the process is much more sophisticated and the dependence between efficiency and effectiveness is not linear.