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Question: I see that the blue light on the top has a dimmer.  Does it turn completely off?  I want to use this in my bedroom, but I don't want any light shining
Document: I put one of these in my bedroom. Before installing it, I tossed and turned a lot at night and rarely dreamed. Now I sleep deeper and dream more often. I suspect my allergies were interfering with my sleep before. (I am primarily allergic to cats and dust mites, but also have a mild mold allergy.) The blue light on top does not interfere with my sleep, but sometimes I turn it off anyway.
I can not stand any light at all. Yes, there is a small knob on the bottom to adjust the light.Update 6/13  I found the light turns off completely when you turn the knob clockwise, which was pointed out to me by a dyslexic. Whodathought?I was going to return the unit and purchase the new Sharper Image Oasis model instead. One night without the Airfree and I decided it was worth keeping. I now use both units.
I have had this for a few months now and have no complaints. It does get a bit warm. I keep it on a small table in a corner with plenty of space around it. The blue light on top could be bright for some people but for me it is a pretty nightlight in this room (not a bedroom).
I bought this unit for my bedroom. I wanted something quiet, rather than the air cleaner I currently have and I need something going all the time due to allergies. You cannot turn off the blue light. It is very bright. I moved the unit to a spare bedroom where I sometimes store dusty items from the attic and it works fine there where I do not mind the light.
so it has a heating element, like my toaster does. And hot air rises, so the company was smart enough to put the air holes on bottom for intake and top for outflow. WOW! It even has a blue light, any toddler ought to love that. Problem is, it does nothing. How COULD it?
The blue light is still a good warning not to drape something over it which of course you're not supposed to do! The main thing is how long it will last as it is meant to run continuously. So far after a month there are no problems. This took care of the basement mold allergy problem in a 12 by 20 foot room. There was nothing to assemble. It comes out of the box and you plug it in where nothing can block the top vent and that's it.
Would give no stars if available. Emits ozone like odor. Tried 3 in small first floor (  NOT BASEMENT) part of  house to cover square footage. Does not cover area as in claims. 3 months later, not one iota difference in slight mildew smell. Only adds to the electric bill each month. Can't tell if is working, only see blue light to say it is on. Bottom line is it has done absolutely nothing to lessen mildew or any other odor. Save your money.
It completely went away after a couple days.Some complain that air doesnt flow through it so it cant do anything. But, so long as it eliminates particles that happen to pass through it, it is doing something. Particles will tend to disperse throughout a room and will keep entering the device until the overall level in the room is low. It may take longer than a purifier with a fan, but I dont see that as a problem since it stays on all the time.
First, I would like to tell everyone who is complaining about the light on the purifier that they should turn their air purifier over... there is a black on and off turn switch on the bottom that allows you to turn the light off if it bothers you!
She's not on any meds for this either so that's not the cause of her improvement. This is more than I could have hoped for. She's much more comfortable and will now hang with us in the livingroom. I just ordered a small one for my bedroom. Now we'll see how it does on my morningtime stuffy nose :-)  Ps. still no funny smells on the lower level!
Answer: Yes