The typical configuration of an air purifier has a pre-filter and a main filter. The pre-filter is designed to capture the larger sized particles, to protect and extend the life of the main filter. The quality of the pre-filter is gauged by the MERV Scale.
Many air purifiers use a foam pre-filter and those fall in the MERV 1-4 range and are the lowest performing filters. A higher performance pre-filter will further improve the quality of the air. We recommend a MERV 6 to MERV 8 rated pre-filter to balance the filtration capabilities with less airflow resistance. Every air purifier offered from Oransi has a MERV Rating of 16, which is the highest rating of any purifier on the market.
For further details on Oransi’s full line of air purifiers for allergies, learn more on our
Air Purifiers Buyer’s Guide