I’m glad I researched away from google and came to decide and buy my Alen air purifier. There is a noticeable difference in every sense. Less dander, son not sneezing, my house is less dusty, and I’ll say it, my skin condition is continuing to get better and better. I’ve had it for almost two months now. It bothers me when reviews read, came quickly, can’t wait to use. Ugh!!! I made sure to wait so maybe some of us can trust in an honest review again. The covers on the filter can be changed and with a superb selection. On high, it’s pink noise and I can’t recall hearing or hearing about a quieter one really, so that’s no problem. Packaged so foolproof and professional, anyone from the age of 8-88 could literally unbox to operate this thing. The main reason I chose this particular model is because of airborne mold. I was on the fence about it because it did not have that uv light. It does not need one, this one works!