Air Purifiers, Ozone Emissions... and Outgassing

Ozone emission, which can be toxic in great amounts, is not desirable, regardless of whether you have allergies, asthma, or a multitude of  chemical sensitivities.  However, the effects are usually worse for people afflicted with these conditions.  To start off, ozone is an irritant to the respiratory system.  It becomes progressively irritating as concentration levels increase. Unfortunately, most manufacturers do not monitor the ozone levels. 

"Out-gassing", which can occur from the silicone used for the gaskets and glues used to attach the filter media to the housing, can out-gas and cause a reaction, especially for people with multiple chemical sensitivities.  If you belong in this class, you should look for an air purifier where the pre-filter and Hepa filter come before the gas filter in the housing, so any out-gassing that could otherwise occur, will be removed by the activated carbon.  Remember also that it is best that there be some type of filter after the carbon gas filter, to remove any carbon particles that may fall off as the air passes through it.

A good air cleaner for those with multiple chemical sensitivities is the IQ Air HealthPro series or the Allerair series.