Activated carbon is among the most effective materials known today for treating airborne chemicals, gases and odor. It's used widely by the military, hospitals, scientific and industrial facilities, and disaster response units for its safe and powerful adsorbing properties.

To be truly efficient, activated carbon filters need to provide enough dwell time for pollutants to be adsorbed. This means that larger, deeper bed carbon filters will adsorb more airborne pollutants.

HEPA stands for High Efficiency Particulate Air and describes a filter that can remove at least 99.97% of airborne particles measuring 0.3 microns or larger. True HEPA filters are composed of a dense web of fibers, and are considered the safest and most efficient method to eliminate particles.

When used in combination, activated carbon filters and HEPA filters (high efficiency particle filters), offer the most comprehensive air purification available to treat airborne particles, chemicals, gases and odor.

Air purifiers and air cleaners with this technology are especially suited for allergy relief, asthma prevention, multiple chemical sensitivity, cigar and cigarette odor removal, pet odor removal, newborn baby health and general home and office use.

AllerAir air purifiers use a five-stage filtration process:

• A pre-filter to capture large particles
• A medical-grade HEPA filter guaranteed to trap 99.97% of airborne particles 0.3 microns in size
• An activated carbon filter with pounds of granular virgin carbon to filter out chemicals, gases and odors
• Two anti-microbial filters

Customize most AllerAir air purifiers with an additional level of air filtration by adding a UV (ultra violet) germicidal lamp.

UV works by breaking down microorganisms and disrupting their DNA, making them unable to reproduce and in effective, "kills" or neutralizes them. Great for airborne mold mycotoxins, bacteria and viruses.