This is one of the best purifiers I've ever seen!

I have a Breeze AT running in my home around the clock. The noise level is negligible, and it is simply the noise of the fan. The fan level can be adjusted manually or with the remote control included with the unit. The ozone used as part of the ionization process is not noticible, unless I have set the unit to sanitize. In this case, it is in a closed, uninhabited room for the two hour sanitizing process, and then the unit automatically turns itself down to your preselected level. I find it absolutely wonderful that I can set the unit to sanitize once a week, place it in my bathroom, open the shower door, raise the toilet seat, and open all my cupboard doors. When I come home several hours later, my bathroom is sanitized, smells slightly of ozone, which disapates quickly after the door is opened. I was told to use my nose as my "gauge". If the smell was too strong, turn the purification setting down, or I could lower my fan speed. I have found that the unit is great to sanitize a bedroom after someone has been ill. I run an extension cord out to my car, once a week, and because I smoke, I run the unit overnight, starting in the sanitize mode, and I know that the unit will kick itself down after the 2 hour period, and my car will be completely smoke free in the morning. I have used the unit to sanitize my bedding-my mattresses and featherbed, my sheets, I simply set the purifier setting up one notch and place it under my covers and sheets and let it run for an hour or two. I then have bedding that smells like it came off a clothesline.
The unit is highly portable, easily moved from room to room, out to my car if needed. Once a month I go through and sanitize my closets, any other enclosed spaces, and the rest of the time it sits on the shelf in my living room. It runs around the clock. I have never yet had anyone ask me what that noise is, but I have had many comments on how fresh and clean my home smells.
Cleaning the ozone plate routinely is very simple, and the filter screen at the back of the unit is a breeze. The unit comes with an instruction video, a remote control, and an extra ozone plate. I think that in terms of value for the money, this is one of the finest machines on the market. If the purifier smell is too strong, I simply turn the purifier level down a notch. If the "noise" level is too high, I can also turn that down a notch. I have 2 dogs that are in my house all the time. We have no doggie odor, no one is bothered by pet dander or allergies. I can't imagine my life without the Breeze AT! My husband has one lung, and he swears by it, it has really helped his breathing. I can't think of a better product to review.