New concerns about ionizing air cleaners

This paper presents the results of tests carried out on 7 different air cleaners : one with HEPA filter and the 6 others are ionizer models . The air cleaners efficiency against dust, smoke, pollen, emitted noise and emitted ozone was evaluated. The results present the HEPA model as the most performing whereas the ionizing air cleaners do a poor job of removing particles from the air and create significant levels of ozone.