According to CARB, cleaning and ventilation are the best ways to improve indoor air quality and “if these actions do not resolve indoor air quality problems, sensitive individuals may benefit from using a central air filter or a good air cleaner in one or more rooms of the house.”
If you choose to use an indoor air cleaner, you should consult CARB’s list of certified, non-ozone generating, indoor air cleaners here.
CARB recommend that air cleaners that intentionally produce ozone should not be used in the home.