Hazardous Ozone-Generating “Air Purifiers” Hazardous Ozone-Generating Air Purifiers http://www.arb.ca.gov/research/indoor/ozone.htm California Air Resources Board site http://www.arb.ca.gov/research/indoor/ozone.htm California Air Resources Board Air Purifiers Hazardous Ozone-Generating ‘Air Purifiers’ problems with ionic air cleaners https://www.arb.ca.gov/research/indoor/ozone.htm California air resources board Hazardous Ozone-Generating Air Purifiers http://www.arb.ca.gov/research/indoor/ozone.htm http://www.arb.ca.gov/research/indoor/ozone.htm arb.ca.gov More Info Air Purifiers http://www.arb.ca.gov/research/indoor/ozone.htm California Air Resources Board http://www.arb.ca.gov/research/indoor/ozone.htm list of potentially harmful air cleaners Hazardous Ozone-Generating "Air Purifiers" California Air Resources Board site air cleaners California Air Resources Board website emissions www.arb.ca.gov/research/indoor/ozone.htm