High Efficiency Gas Absorber

Last updated: October 13, 2016

What Does High Efficiency Gas Absorber Mean?

A High-Efficiency Gas Absorber (HEGA) is a carbon cloth filter with activated carbon as its main component. HEGA filters can absorb odors, gases, and volatile compounds (VOCs).

HEGA filters are also lightweight and easy to carry, making them a suitable option for respiratory PPE for the public.

To earn the HEGA designation, a filter must perform at a minimum efficiency of 99.9% when tested in accordance with the Institute of Environmental Sciences and Technologies (IEST) designation: IES-RP-CC-008-84, Recommended Practice for Gas Phase Adsorber Cell.

Safeopedia Explains High Efficiency Gas Absorber

Activated carbon has a highly porous, random, imperfect structure, which enables it to attract and trap organic chemicals. It has the strongest physical adsorption forces of any material and can have a surface area greater than 1000 m2/g.

The activated carbon in HEGA filters is even finer than it is in its granular form. This provides a greater surface area per unit weight, significantly increasing its gas adsorption capacity.

While HEGA filters provide a barrier against odors, they are not intended for use in odor control systems.


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