Air purifiers are particularly helpful to people who suffer from allergies or asthma, because they reduce or eliminate contaminants in the air. They're designed to manage airborne particles such as dust, pollen and pet dander, and reduce exposure to health risks such as secondhand smoke and bacteria.
It's estimated that almost half of all major health problems are caused by indoor pollutants and air contaminants. The benefit of using an air purifier is primarily to decrease the risk of contracting common respiratory illnesses, colds, headaches and allergic irritation of the nose and eyes.
Although purifiers can alleviate many of these health symptoms, they aren't designed to prevent them. The air filters work by blocking particles and toxins before they're inhaled. They don't prevent particles from being absorbed by walls, furniture, clothing and other household articles.
When treating allergy-related asthma, take a comprehensive approach to cleansing particles from the air. Many electrostatic or ionic air purifiers have the potential to leak ozone, which causes chest pains and lung-related illness and further irritates allergic reactions. Maximize the benefits of using an air purifier with HEPA filters, which do not produce ozone or any other harmful side effects. Also, ensure the indoor space is properly ventilated, and consider using dust-mite-proof bed coverings.