A large number of people are skeptical to climatic devices sold in stores, and specifically, to air purifiers. According to their concepts, this thing is absolutely not needed in the household, and that it is enough to do ventilation so that the air in the room becomes clean and fresh. The urban air is strongly naked with pollen, dust, microspores of various plants, viruses, tobacco smoke, animal hair. This list can be listed indefinitely. And if the house is near with the road, then almost the entire Mendeleev table, from which the most common are substances such as lead, carbon monoxide, sulfuric anhydride, and t, can get into the room along with street air. D.