Gas Phased (activated carbon) Air Purifiers

Let's take a look at Gas Phase Air purifiers. Mechanical (eg. HEPA) and electronic air purifiers cannot remove gases and odors that are typically 0.3 microns or smaller. What is needed is a filtration system usually uses activated carbon to absorb these gases - usually called "gas phased" or "activated carbon" air purifiers

Activated carbon is basically charcoal that has been treated with oxygen and it has millions of tiny pores between the carbon atoms. The pores in these gase phased air purifiers then absorb the gas molecules, hence the name 'gas phase filters'.

When choosing a gas phased air purifier, you need to check the following:

Find out the quantity of activated carbon in the filter
The more activated carbon the air purifier has, the better it is in absorbing gases.

The thickness of the activated carbon filter.
A thick filter has a higher adsorption efficency because the gaseous pollutant has to go through a long maze of activated carbon.

Type of activated carbon - Impregnated carbon fiber pad or granular activated carbon? Air purifiers with granular activated carbon is more effective. I've explained why in this artile, activated carbon air purifiers