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Electronic Air Cleaners and Ozone

Electronic Air Cleaners and Ozone
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ozoneWhen the topic of electronic air cleaners comes up it usually doesn’t take long for questions to arise about ozone and whether it is safe or not. So due to several comments on this blog and questions I have received by email I thought I would share a link to a report I found, published by the US Environmental Protection Agency. The report should provide answers to most questions concerning ozone and any health risks associated with it.

It is important to point out that the report mentioned below is only to illustrate the effects of over exposure to ozone and not to imply that electronic air cleaners generate that much ozone. The report refers to ozone generators, not electronic air cleaners.

The title of the document is “Ozone Generators that are Sold as Air Cleaners: An Assessment of Effectiveness and Health Consequences

The topics covered are:

  • What is ozone?
  • How is ozone harmful?
  • Is there such a thing as good ozone and bad ozone?
  • Are ozone generators effective in controlling indoor air pollution?
  • If I follow manufacturers directions can I be harmed?
  • Why is it difficult to control ozone exposure with an ozone generator?
  • Can ozone be used in unoccupied spaces?
  • What other methods can be used to control indoor air pollution?


The table below is copied from the report for those who do not want to read the entire document.

Ozone Health Effects and Standards

Health Effects Risk Factors Health Standards
Potential risk of
Factors expected to
increase risk and
severity of health
effects are:
The Food and Drug Administration (FDA)
requires ozone output of indoor medical devices to
be no more than 0.05 ppm.
Decreases in lung
Increase in ozone air
The Occupational Safety and Health Administration (OSHA) requires that workers not be exposed to an average concentration of more than 0.10 ppm for 8 hours.
Aggravation of asthma Greater duration of
exposure for some health effects
The National Institute of Occupational Safety and Health (NIOSH) recommends an upper limit of 0.10 ppm, not to be exceeded at any time.
Throat irritation and
Activities that raise the
breathing rate (e.g.,exercise)
The Environmental Protection Agency (EPA)’s National Ambient Air Quality Standard for ozone is a maximum 8 hour average outdoor concentration
of 0.08 ppm.
Chest pain and shortness
of breath
Certain pre-existing lung
diseases (e.g., asthma)
Inflammation of lung
Higher susceptibility to
respiratory infection
ppm = parts per million



p.s. I hope you found the information in this article helpful. If so, hit the like button and share it with your friends.


More Articles About Electronic Air Cleaners And Ozone:

Electronic air cleaners create ozone

Ozone is formed when an electric discharge passes through the air and there are many natural sources of ozone. For example, ozone is formed naturally by lightning and is also formed as a by-product of some electric motors and appliances.

About the author: Don has been working in the HVAC industry for more than 25 years and shares his experience and knowledge on this site. If you find the information presented here helpful please share with your friends.

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