Choosing the right air purifier

Air purifiers are categorised in three different variants - filtration, electrostatic precipitation and ionising. According to the Environment Protection Agency or EPA, its widely stated that electrostatic and ionising purifiers risk creating ozone gases. HEPA (High Efficiency Particulate Absorber) filter is the most effective form of air purifier. While buying an air purifier, look for HEPA based purifiers. Every air purifier comes with a CADR (Clean Air Delivery Rate), the more the CADR the better the air purifier. Air purifiers are measured by MERV (Minimum Efficiency Reporting Value) where the lowest rating is one and the highest twenty. HEPA filters are generally in between 17 to 20.