HEPA air purifiers
HEPA stands for High Efficiency Particulate Air. HEPA is not a brand of air cleaner. It is a type of air filter that is used in air cleaning and purification equipment including air cleaners, air purifiers and in high quality vacuum cleaners. Most HEPA air purifiers will filter particles in airborne environment down to 0.3 microns in size, at an efficiency rating of 99.97%. They will filter and remove some of the smallest microns of allergens such as dust, smoke, pollen, animal dander, dust mite allergen, etc.
HEPA filters are generally regarded as the most effective type of filter currently available. Air purifiers utilizing HEPA filters are used widely in situations where clean air is critical such as in hospital operating rooms and laboratory clean rooms. For those with allergies and/or chemical sensitivities, a HEPA filter air purifier can bring significant relief from symptoms by capturing allergen particles such as dust and pollen as well as volatile organic chemicals such as those in cigarette smoke and household cleaning products.