My 5 year old child was suffering from allergies & getting sick often. Since we got this for his bedroom, his health has improved 90%. I’m super happy with this product. I’m considering buying a second one. I already recommended it to my family members, which will buy one. Great value. Price is affordable. And researched ozone ratings and it’s the right rating for indoor healthy air. This is a must for people with allergies and specially kids. Super happy :)