I purchased this to help my health while I lived in some less than humane yet affordable housing. I could tell a real difference just walking into my room vs out in the kitchen or other areas. I love the size, the quietness and design. I liked it so much I purchased one for a family member who has dust allergies, then they bought a few more for their childrens rooms. Everyone has loved it and says it makes a difference. Also the extra protection with the lights inside that kill viruses and bacteria is a peace of mind during this time.