There are plenty of technologies that are applied to take measures for cleaning interior air. There exist a lot of various means and media used in air purifiers so they can distribute fresh and secure air to users. These technologies embrace HEPA, electronic, UV, ionic breeze and chemical absorption media. However, some technologies appeared to be more efficient than others and some of them may be even detrimental to those who use them. Every kind of technology, applied to an air purifier, is produced to purify the air of particular elements and smells. The efficiency and usefulness of every medium is assessed in various ways. Choosing the best air purifier with the most effective technology may be easy due to some examination and evaluation. 
High Efficiency Particulate Air filter (HEPA) technology is one of the most widespread means applied to air purifiers. An air purifier supplied with a HEPA filter is capable to soak up 99.7% of all elements which are 0.03 microns and bigger in size. The main part of detrimental elements that are found in air are gauged to be almost 0.03 microns or bigger. The HEPA filter is capable to soak up almost all harmful elements and make the air cooler and purer to breathe in. Chemical vapors, bacteria, dust particles and blossom dust are soaked up by the filter and the air generated by an air purifier once being filtered doesn’t comprise those pollutants. When the air comes into an air purifier and runs through the HEPA filter, it is dismissed into the room to circulate. 99.7% of all elements the air contains and which passed through the filter become absorbed.
Another type of technology available nowadays is electronic technology. Air purifiers applying electronic technology are very efficient in removing chemical particles, dust and fumes from air. This type of technology makes use of an electronic charge to draw particles to collection plates and removes them from the air. Electronic air purifiers turned out to be 95% effective and are capable to soak up almost all particles from the air. We may contrast electronic air purifiers with magnets. They charge particles in the air with the help of static electricity. The opposite charge may be found in the air purifier and these two charges are drawn to each other, catching the particles inside the air purifier. It is very easy to maintain air purifiers; they only need cleaning of the collection plates for the best effectiveness. The efficiency of electronic air purifiers has become evident owing to the high percentage of effectiveness.
Air purifiers with ionic breeze technology need still to be confirmed. Theoretically, an ionic breeze air purifier traps the particles on metal blades inside the purifier that hold electric charge. The blades move the air within the unit by arousing a stream of air. Both positive and negative ions are considered to draw the particles and fumes and make them glue to the blades. Nevertheless, an ionic breeze purifier is appeared to be capable to absorb only 30% of the detrimental elements in the air. The purifiers based on ionic breeze technology are also appeared not to absorb all air in an enclosed room. As it was found out, such a purifier leaves almost 5% of the polluted air in the room to circulate without it ever being soaked up by the air purifier.
Another kind of means applied to some air purifiers aiming at removing smells and some types of fumes are known as a chemical absorption technology. Such chemical agents as activated carbon, zeolite or potassium permanganate are added to certain air purifiers. They may add more effectiveness to the filtering system applied to air purifiers. These chemical agents also soak up smoke or elements that air may contain. They are characterized by neutralizing smells and soaking up chemicals. An efficient filtering system that is equipped with chemical absorption materials as well may generate purer and cooler air.
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