Your 501 is FANTASTIC! Four hours of online research was very well spent. Your product was 'highly touted' on MANY sites, and now I know why. It has surpassed ALL my expections. At first,I doubted its effectiveness of moving air, because it does not make any noise. On 'level 3', it's quieter than my computer. It's efficiency and quality in EVERY way is superb. I couldn't be happier. The only way to improve this product is to give it a remote control.

(Please feel free to use any or all of this response to your product in any way you deem profitable).

A very satisfied customer,

Jeffrey M. Gaab

"I have three dogs that spend a good part of the year indoors. When I came home the day I received the Blueair unit, I immediately plugged it in and put it to use. I was astonished that within minutes my house smelled better! I continue to use the Blueair on a daily basis and recommend it to everyone."

Teresa Sanders
Wilmington, IL

"I never thought about purchasing an air purifier – mainly because of the cost. But I noticed a difference in the air where the Blueair is sitting. The air seems clearer and the unit is so easy to use."

Darlene Shaffer
Altoona, PA

"The air smelled fresher after the first few days."
Lois George
Mokena, IL