IQAir can boast a "0" (zero) particle per million reading on the emissions of their units because of the sealed body, and the choice of filters. The IQAir HEPA H11(S) Pre Filter is designed to fit the IQAir Multi Gas GC unit. When placed in the air purifier unit the HEPA Pre Filter is the first filter the air passes through when it enters the unit. This filter is designed to be the first layer of filtration and will capture and store the smallest particles down to a size of 0.003 microns allowing you to breathe the cleanest air available.
For best performance change your filters by following the Filter Life Monitor system built into each machine. This monitoring system will tell you when your filter is reaching the end of its effectiveness. Filter life will vary depending on usage and air particle composition.