SINCE 1928 - For almost 100 years FilterQueen has been manufacturing products in the USA built to make a healthier home. BECAUSE IT MATTERS - The Defender air purifier is FDA-Cleared, Class II Medical Device. It has had this designation for over 20 years.
TRUSTED BY MILLIONS - The FilterQueen line of products have been enjoyed by millions of customers in countries worldwide. BACKED BY VERIFIED RESULTS - The Defender has been independently tested to eliminate harmful pollutants from the air. See Efficacy Report link on this listing to see lab results.