I had, note HAD, two (2) of these Honeywell units, and overall, they were on the noisy side when compared to the Hunter Quietflo, but they did the job, BUT just FOR a few years, then both of motors burnt out... the first unit warned me with a squealing noise for about a week and then just froze up... the second one, well, it was the silent sufferer of the two, never complained but just stopped one evening within months of the first. If it would have be just one of the air purifiers, well, I would have though bad luck... but both? NOT. I had the motors checked out and both were DOA... my option was to send them back to Honeywell and have them replaced for almost price that I paid... the other was to buy another. That is what I did, but, not Honeywell (I bought the Hunter QuetFlo #30402). For the price of a Honeywell the motor should run for many years, not just a few. Conditionally recommended