In some cases, pollutants may be generated more quickly than they are removed. The effective volume of the air to be cleaned. A single portable unit used in a room within a large building in which the air flows between several apartments or offices would be of little or no value. The decrease in performance which may occur between maintenance periods and if periodic maintenance is not performed on schedule. To Consider Ion generators and electronic air cleaners may produce ozone , particularly if they are not properly installed and maintained.
Ozone can be a lung irritant.
Gases and odors from particles collected by the devices may be re-dispersed into the air. The odor of tobacco smoke is largely due to gases in the smoke, rather than particles. Thus, you may smell a tobacco odor even when the smoke particles have been removed. Some devices scent the air to mask odors, which may lead you to believe that the odor-causing pollutants have been removed. Ion generators, especially those that do not contain a collector, may cause soiling of walls and other surfaces.