According to the raw material, structure and filtration effect, the filters can be divided into various types. The mainly filter types on the market are HEPA, activated carbon filters, photo-catalytic filters, and negative ion filters.
HEPA
HEPA is the abbreviation of high efficiency particulate air filter, mainly made of fiber cloth, fiber mesh, paper, carbon fiber, etc. HEPA can filter pollutant particles up to 0.3 microns above 99.97% of the particles, for bacteria, viruses, pollen, dust mites, etc. Allergen particles can also be well filtered, so it is currently the most common type of filter on the market.
Activated Carbon Filter
Activated carbon filter is a type of filter that adsorbs pollutants and captures odors through activated carbon particles. Activated carbon filters can effectively remove harmful gases and odors such as TVOC, formaldehyde, ammonia, etc. The purification effect for chemical pollutants is more ideal.
Photo-catalyst Filter
Photo-catalyst filter is a type of filter that decomposes harmful gases and odors by using ultraviolet light to excite the catalyst to produce a chemical reaction on the surface. Photo-catalyst filter can effectively decompose formaldehyde, TVOC and other harmful gases and odors, and has an effective sterilization and antibacterial effect.
Negative Ion Filter
Negative ion filter is a type of filter that adsorbs dust and bacteria in the air by generating negative ions to electrify the air and enhance human immunity. Negative ion filter can effectively remove PM2.5, bacteria, formaldehyde and other harmful substances, with excellent air purification effect and good health care.
