What amount of ozone is generated by the Aprilaire 5000?

Wednesday, August 18, 2010 by Aprilaire Team
Consumer question:

We are building a new home and the HVAC contractor has recommended Aprilaire 5000 as a possible air cleaner because I have allergies. We have had an electronic air cleaner for many years in our current home and have been pleased with it. Newer homes are designed and built tighter, leading to a concern that small amount of ozone which most electronic air cleaners emit is potentially harmful to our health. The latest issue of Consumer Reports of September, 2010, declined to rate electronic air cleaners for that reason.  http://www.consumerreports.org/cro/appliances/heating-cooling-and-air/air-purifiers/air-purifier-buying-advice/types-of-air-purifiers/electrostatic-precipitators/closeup-electrostatic-precipitator-advice.htm
What amount of ozone is generated by the Aprilaire 5000?

Aprilaires' response:

Thank you for contacting us with regards to our Model 5000 Electronic Air Cleaner. Aprilaire shares our customer’s concerns about ozone, and wants to reassure you that our Model 5000 Whole Home Electronic Air Cleaner is not designed to produce ozone.

Ozone is produced as a result of many factors, some are man-made and some originate from nature. On any given day in the US, outdoor levels can be as high as 150 ppb.  More polluted areas typically have higher outdoor ozone levels because there is a greater concentration of the components that create ground level ozone. 

Levels of ozone inside our homes typically range from 10 to 70 percent of the level found outdoors, primarily depending on whether windows and doors are left open. (ref. “Ozone Decay Rates in Residences”, Harvard School of Public Health, Environmental Science and Engineering Program).  The reason indoor levels are lower than outdoor levels is because ozone readily reacts with other gases and surfaces.

As a manufacturer we look to government organizations to set the standards as which to develop and produce products by.  As such, we offer an air cleaner that produces 2 ppb, well below the established FDA standard of 50 ppb for medical devices and the UL standard to evaluate products for consumer safety.

The high voltage power supply contained in this (and any other) electronic air cleaner produces ozone only as a byproduct of operation; the small amount of ozone generated dissipates by the time clean air filters out and into your home. In addition, the Model 5000 removes particles from the air that have proven by research to be harmful to humans. 

There are a select group of people who are sensitive to ozone.  For these people, we recommend using the Aprilaire High Efficiency air cleaners Model 4200 or 4400.  For everyone else, the Aprilaire Model 5000 is the best air cleaner for your home.

Comments for What amount of ozone is generated by the Aprilaire 5000?

Monday, March 21, 2011 by Robert Mendelson:
Your posts concerning the ozone produced by your model 5000 air cleaner still leaves me uncomfortable. You begin by trying to dismiss the problem by saying there is such a high background level of ozone that the 2ppb created by your machine is inconsequencial and that all produce some from its AC power cord, anyway. Then you finish by saying that for sensitive people you should use different filters. It is what you are not saying that is the problem. I worry that if you do not open your windows will the ozone levels continue to compound expoentially? If you know this can happen and you do not address it I would read your statements as misleading and selfserving. So can this happen?

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