Due to all of the issues going on this year with the country and health, I purchased my first air purifier due to my minimal asthma and allergies...worst year for my allergies thus far and needed some peace of mind that the air in the residence was clean...this product tells you when your air has been compromised...working in the kitchen frying in a grill pan and the air purifier informed me that my air was a bit saturated with something and within a length of time, had my air cleaned...Just need to add there are also dogs in the home...I am greatly impressed...