Hazardous Ozone-Generating "Air Purifiers"

This page last updated October 1, 2012.


Not all air-cleaning devices are appropriate for home use — some can be harmful to human health. The ARB recommends that ozone generators, air cleaners that intentionally produce ozone, not be used in the home. Ozone is a gas that can cause health problems, including respiratory tract irritation and breathing difficulty (Ozone and Health).

In response to legislation, Assembly Bill 2276 (2006, Pavley), the ARB has adopted a regulation to limit the ozone emissions from indoor air cleaning devices. For more information on the regulation, please visit: 


Go to list of certified air cleaning devices

Air Cleaner Regulation Webpage

Links to information that can help you select a safe and effective air cleaner are provided below. If you need further assistance after reviewing these links, please contact Susan Lum at 916-445-0753.


CALIFORNIA CERTIFIED AIR CLEANERS

Some manufacturers have submitted test results and obtained ARB certification of their air cleaning devices as required under our regulation. The list of California air cleaners certified to date is available at the link below. Certification is based on their electrical safety and their low ozone emissions.  Please note that there may be safe air cleaners available that have not yet been certified by ARB, so please check both the list below and the information in the sections below entitled “Air Cleaners To Avoid” and "How to Select a Safe and Effective Air Cleaner” to make the best selection for your needs.


Go to list of certified air cleaning devices

List of California Certified Air Cleaning Devices

AIR CLEANERS TO AVOID


go to list of potentially hazardous ozone generators

List of Potentially Hazardous Ozone Generators Sold as Air Purifiers (September 28, 2012)

Fact Sheet: Beware of Ozone-Generating Indoor "Air Purifiers" (March 2006)

HOW TO SELECT A SAFE AND EFFECTIVE AIR CLEANER


"Air Cleaning Devices for the Home, Frequently Asked Questions" (Fact Sheet, Feb. 2005)

"Air Purifiers: Filtering the Claims," Consumer Reports, December 2007, Issue 12, pages 48-51. Posted with permission; for educational purposes only. 

Clear Air Delivery Rates (CADR) of Many Air Cleaners - Association of Home Appliance Manufacturers (AHAM)

RELATED ARB AIR CLEANER INFORMATION


Go to report

REPORT: Evaluation of Ozone Emissions from Portable Indoor Air Cleaners: Electrostatic Precipitators and Ionizers, February 2008 

FINAL RESEARCH REPORT: "Survey of the Use of Ozone-Generating Air Cleaners by the California Public", December 2006

go to report

REPORT: Evaluation of Ozone Emissions From Portable Indoor "Air Cleaners" That Intentionally Generate Ozone, May 2006

PRESENTATION: Actions to Address Indoor Ozone Generators: Health Update to the Board, May 5, 2006

PRESS RELEASE: Some Devices Marketed as Air Cleaners Dangerous to Public Health, Issued May 31, 2006

PRESENTATION: Ozone Generators Sold as Air Purifiers: Health Update to the Board, January 20, 2005

PRESS RELEASE: ARB Warns, Danger from Popular "Air Purifying" Machines, Issued January 20, 2005

OTHER SOURCES OF AIR CLEANER INFORMATION


go to document

American Lung Association of California Consumer Product Alert: Take Ozone-Emitting Air Cleaning Devices Off Your Gift List, November 2006

U.S. Environmental Protection Agency Ozone Generator Website

"Air Cleaners: Some Do Little Cleaning," Consumer Reports, October 2005, Vol. 70, Issue 10, pages 39-41. Posted with permission; for educational purposes only.

"New Concerns About Ionizing Air Cleaners," Consumer Reports, May 2005, Vol. 70, Issue 5, p 22. Posted with permission; for educational purposes only.

For additional information on air cleaners and particles, please click here.

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