Air purifiers are apparatus that eliminate contaminants from the air. These devices are frequently marketed as being helpful to allergy victims and asthmatics, and at plummeting or removing second-hand tobacco smoke. A commercial grade air purifier is created as either small stand-alone unit or larger unit which can be attach to an air handler unit (AHU) or to an HVAC unit located at the medical, industrial, and commercial industries.

The common allergens: Dust, pollen, pet dander, mold spores, and dust mite feces are known to trigger allergies in sensitive people. Smoke particles and volatile organic compounds (VOCs) can cause a risk to health. Contact to a range of components such as VOCs raises the probability of experiencing the symptoms of sick building syndrome. In addition, with the improvement in technology, air purifier is becoming more and more able of capturing a greater number of bacterial, virus, and DNA damaging particulates. Air purifier is used to lessen the amount of these airborne contaminants and though very useful for people who experience allergies and asthma, technological and scientific studies are finding that reduced air quality is more a contributing factor of some forms of cancer, respiratory illnesses, COPD, and other pulmonary infections and illnesses. They also diminish the need for recurrent room and area cleaning.