Does the Aprilaire 5000 generate ozone? What is the MeRV rating of the Aprilaire 5000?

Blog question:

Does the Aprilaire 5000 generate ozone? What is the MeRV rating of the Aprilaire 5000?

Aprilaires’ response:

Thank you for contacting us. 

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. 


Unfortunately the Model 5000 does not have an actual MERV rating.  The reason is because the MERV test is performed with a carbon-like dust.  As we all know, carbon cannot and does not conduct electricity.  If we were to perform a MERV test on the Model 5000, the carbon dust would cause the unit to short out and not operate properly. 


Therefore, we conducted our own MERV-like test in our facilities by using a synthetic dust.  The results show that the Model 5000 Electronic Air Cleaner can be compared to a MERV 16. 

2 thoughts on “Does the Aprilaire 5000 generate ozone? What is the MeRV rating of the Aprilaire 5000?

  1. Robert Mendelson

    I was shocked to read the Consumer Reports story on the ozone generated by the Aprilaire 5000. If the machine only produces 2 PPB, why hasn’t this information been given to CR?

  2. Joe Mehaffey

    Your statement above should say that carbon CAN and DOES conduct electricity. Your conclusion and All the rest sounds fine.


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