Best choice for people suffering from allergies or asthma
HEPA air filters are rated highly due to their best in class ability to remove a high percentage of particles with each pass of air through the air purifier.
If you suffer from allergies or asthma, a HEPA air purifiers is the best choice since its filtration is designed to remove the smallest particles that trigger an allergic reaction. These microscopic particles stay suspended in the air longer and are more likely to be breathed deep into your lungs. These particles will simply pass through a standard air filter.
One of the key aspects of air cleaning is to not introduce a pollutant such as ozone that exists in some other air purification technologies. In our reviews we have not seen any HEPA based filters with elevated levels of ozone but if that is a concern be sure to ask.
Air Purifiers for Summer Allergies Recommendations: http://en.agcen.com/news_detail/newsId=40.html
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Why HEPA air filter need periodic replacement?