I suffer from allergies and since I installed the purifier I have noticed a lot or too much improvement in my symptoms, because when the air quality drops, the fan automatically turns on and gives me a super good air quality, 100% that makes me feel quiet, the design is very elegant and seeing the screen with the reading at 100% is the best and safest thing about the air in the rooms, keeping it in AUTO is an excellent idea, because when the quality drops, it automatically turns it into good and that gives security for the health of me and my family, highly recommended, I love it!!!