I can’t really tell the difference, but from the moment it first turned on it stayed blue so maybe my air quality wasn’t very bad. I will say it would be much more convenient if this unit had a handle. Moving it out from the wall, moving to another room and just initial set up seems it could be easily engineered to have a flush handle to pull up when moving.

We are very happy with the purchases of our AD1000's.

This was my 4th Air Doctor purchase and it has a very strong plastic smell it emits when its running. It took over a week for it to go away, I had to run it and open the window every once in a while to get the smell out (and yes the plastic packaging on the filters were removed before turning it on!). I haven't had this issue with my past Air Doctor purchases so they probably recently changed manufacturers

I purchased 3 of these 1000 AirDoctor cleaners for our bedrooms plus an AirDoctor 4000 unit for the living room and kitchen/dining room area! I can’t believe the incredible difference these have made in our house! The air is so clean and fresh now!! We have a small house and it just felt stuffy and stale, especially now in the winter when all the windows are closed. We live in MN so it’s way too cold to open windows so this is the perfect way for us to enjoy refreshing clean air. I love these AirDoctor cleaners!

I purchased ‘ 3 ‘ Air Doctor purifiers for our apartment, 1000 - 4000 -5500. Two for bedrooms one for living / dining / kitchen area. Please advise, the master bedroom has dust on the furniture, we have the 4000 in this room, I set it at speed 2 during the day, should it be higher. ? What can be done, if anything. ? Michael Weisman