6 Stage Filtration

The MinusA2's filtration system is based on a breakthrough technology that employs a 6-stage purification and deodorization system. It traps airborne allergens and contaminants down to 0.3 microns in size 99.97% of the time. Stage 4 includes a customized filter which adds an extra layer of protection against different types of germs, chemicals and allergens. Choose between: Germ Defense (Baby), Toxin absorber (New House), or Pet Allergy (Pet Lover).

Stage 1 - Nano-Silver Pre-Filter

The nano-silver pre-filter is specially treated through an electrostatic process. This nano-silver pre-filter can effectively kill germs and trap pet hair, large size allergens and dust.

Stage 2 - Medium Filter

The anti-bacterial medium filter destroys mold and bacteria while trapping airborne allergens larger than 1 micron in size such as pollen and pet dander. This filter increases the overall purifying efficiency of the MinusA2 air purifier and extends the life span of the HEPA filter.

Stage 3 - BioGS Signature HEPA Filter

BioGS Signature HEPA filter traps & destroy airborne allergens down to 0.3 micron in size, 99.97% of the time. This filter also eliminates germs & mold.

Stage 4 - Custom Filter

You can customize your MinusA2 air purifier by choosing the custom filter that best fits your needs. You have a choice of Germ Defense, Toxin Absorber, and Pet Allergy. Each type of custom filter is specially engineered to trap and destroy different types of germs, chemicals and allergens.

• Germ Defense (Baby) Filter - Effectively traps and destroys mold, viruses and bacteria such as Legionella.


• Pet Allergy (Pet Lover) Filter - Effectively traps and destroys pet dander and germs from your pet such as influenza virus & bacteria.


• Toxin Absorber (New House) Filter - Eliminates toxic formaldehyde, VOCs & other offgassing from new house materials & furnishings such as carpet & paint.

Stage 5 - AC Carbon Filter

The activated carbon filter can effectively remove odors, VOCs, and common household odors.

Stage 6 - Negative Ions

Negative Ions facilitate the purification process and are known to improve low energy and depression.

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