Air consists of basic gases, containing various particles and aerosols, often also different ionized gases.
Air filters remove particles from the air, while activated carbon filters are bound with ionized gases and unpleasant odors (smell).
For the filtration of larger, dust particles from the air, we are using coarse filter materials (non-woven synthetic materials, glass mat…). These filters are characterized by a large dust capacity, low pressure drop and a relatively good price. Since these filters usually appear before other filters, they could be called PRE-FILTERS.
Next are the FILTERS FOR COARSE AIR FILTRATION. The filters of the coarse filtration come with an integrated and impregnated cellulose filter paper or non-woven synthetic materials (polypropylene, polyester).
The next stage are the MICROFILTERS, the filters that remove micron particles from air; they are composed by finer filtration materials, fine non-woven synthetic materials, membranes made of mixed fibers and borosilicate glass fibers.
The finest filters were earmarked with the term ULTRA-FILTERS, because they are also used to remove sub-micron particles from the air. Since these particles are suspended in the air and form aerosol with air, the filters can also be called AEROSOL filters. The most widely used filtration material is the membrane made from the finest borosilicate glass fibers and PP materials, while laminated PTF membranes are used for specific purposes.
Filtration of active air gases (including unpleasant odors) is carried out by activated carbon filters – Active filters. Various types of active charcoal are usually used as filtering substances. In addition, COMBINED AEROSOL ACTIVE filters perform both functions at the same time.