AllerAir air cleaners use a 4 phase filtering system.
In the order that the air passes through them they are: the pre-filter, the Mass Activated Carbon Bed (MAC-B™) filter, the 2 anti-microbial filters and the HEPA filter.

1) The pre-filter traps larger dust particle and is easily removed and cleaned with a vacuum cleaner. It acts to stop the larger particles such as dust and lint from clogging the other filters.

2) The mass activated carbon bed (MAC-B™) filter adsorbs gases and odors. (Adsorb: no it’s not a typo. This is the process by which activated carbon captures gases and odors.) Most off the shelf air cleaners have a few token ounces of carbon sprayed on the pre-filter. This is only sufficient to capture a small amount of the noxious gases and odors in the air and for only a short period of time. The MAC-B carbon filter has pounds of activated carbon (from 7 to 160 lbs.) that will trap 90% of gases and odors that pass over it and will continue working for many months before needing to be replaced.

3) The 2 anti-microbial filters kill the airborne microbes that pass through them.

4) The HEPA filter traps the airborne particles. These filters were developed by the Atomic Energy Commission to trap radio-active particles. They can capture 99.97% of particles as small as 0.3 microns. That is as small as some bacteria.

Aller Air Filtration Features:

•  Radioactive
(MAC-B) filter for airborne chemicals, gases and odors
•  True HEPA filtration for particles
•  All metal casing that prevents emission of plastic vapors
•  A UV lamp as an available option for microbiological or mold problems