This is a fantastic product. I have pets and it causes my allergy and asthma but of course, I can't get rid these furry members of the family. I am taking prescription meds and even vac our home that has HEPA filter and it even says it's "Asthma and Allergy friendly" still it's no use. We have a whole-house Honeywell electrostatic air filtration system that is cleaned monthly. Still allergy problems. Then we bought this product and put it in my room and I feel a lot more comfortable with it on. We set this air purifier turned on 24/7. We have no problem with its sound as it's fairly quite on normal setting. We are planning to buy another Mammoth 1000x for the whole house. I highly recommend this product!