Many people who want to improve the quality of the air inside of their homes are unknowingly making it worse by using air purifiers that intentionally produce ozone, also called ozone generators. The Connecticut Department of Public Health (CT DPH) recommends that ozone generators not be used in the home.

Ozone is a gas that can cause health problems, including respiratory tract irritation, breathing difficulty, asthma exacerbation, and chest pain. Symptoms to watch for include coughing, shortness of breath, and chest tightness/chest pain. In asthmatics, it can trigger asthma attacks and worsen symptoms. In people already in poor health, repeated exposure to high levels of ozone can increase the risk of dying.

According the DPH, the best way to remove pollutants from indoor air is through source control. For example, try not to use odorous products indoors; substitute low or no odor products in their place; move activities that generate dust and other particles outdoors or to an area with a dedicated exhaust; do not smoke indoors. Add additional supply air (dilution ventilation) if needed.

For more information regarding these products, please read the DPH Fact Sheet.