What is HEPA filter?
HEPA filter also known as High Efficiency Particulate Air Filter usually employs a fan drawing air through a filter. Since it uses fans to filter the air, HEPA filter is usually very noisy and the cost to replace the filter is quite expensive. HEPA air filters can only effectively remove particles of larger than 0.3 microns from our air. And most of the airborne pollutants and irritants are smaller than 0.3. Also, with HEPA filter substantial portion of the airborne particles flowing through our rooms remain unfiltered. Only the air that passes through a HEPA filtering unit is cleaned.
