Quiet and good air volume
934932
Not a lot to add to the previous reviews except that the noise level of this fan is surprisingly low. We replaced an old Nutone unit that was rated at 50 cfm and 4 sones with this one. The Hunter is so quiet that I often think I have forgotten to turn it on when I'm standing in the shower. It also clears the steam out of the bathroom more effectively than the old fan. We'll see how many years of service we get out of this one. The motor in our old fan was generally good for five years or so. This one seems like an improvement in all aspects.
12842
I have two of these air cleaners in my house.  One in the living room that serves the living and dining rooms, and possibly the kitchen.  Then I have another for the bedroom.  On quiet mode, this unit is very quiet and I can barely hear it as I drift off to sleep.  The one in the front of the house is nice and quiet too.  It sits close to the television and in quiet mode is silent enough not to be heard over the television, even on very low volume.

When you crank this unit up, though, it really churns through some air.  It will get louder, but it will clean your air quite quickly.  I will often turn it up when I leave for work, or when I go to bed, and always, when I return to the front of the house, the air smells and feels clean.

I am not exactly what the cleaning schedule should be for the filters.  I vacuum them out once a month, but have yet to replace them.  They still seem to be catching a lot of dirt, and are still cleaning the air quite well.

I noticed that about a week or so after i put them both in my house that I started feeling better.  If you pressed me, I wouldn't be able to tell you exactly how I feel better, but I do.  And I have't been sick since I put them in!
2233244
I use this fan on a nightstand next to my bed. Works great at cooling me off with a constant yet gentle flow of air.  The settings are low, high, and oscillate (on/off).  It's slightly louder than I would prefer, but I find it useful as "whit noise" because I live in a loud section of the city. It's perfect for drowning out the outdoor noise.
1563955
I needed a fan with a nice and gentle breeze for my cubicle at the office and this fan fit the bill. The fan is very quiet and in fact I have a hard time hearing it. One of the benefits of this fan is I how I can easily clean it. Without the fan cage catching dust and blocking access to cleaning the blades, cleaning this fan is a snap. The retrostat dial to adjust the speed works well, but don't expect this fan to push like 10" fan. With the adjustable neck I can angle the fan to blow a perfect breeze and it holds the position without any vibration or creep. The fan is built solidly and everything is put together well, in fact the base is a bit hefty which was a surprise. The USB cord is soft and flexible. Sometimes these cords are a bit stiff and unwieldy in holding it's shape, but not this one.

Because it uses a retrostat (and I haven't cracked it open to see the wiring) I would recommend that you don't over adjust the speeds to quickly. When I first got it and turned it on nothing happened. I turned the dial half way and a gentle touch got it going. Now the fan spins at the lowest setting. Just needed a slight break in from the manufacturing.
4457065
Very quiet. Works well and temperature is accurate for the setting. Have only used it for a month on the air-conditioning. Will see how the heat portion works in the colder weather
1621645
I got this to replace the fan on my mini-ITX file server where I didn't have much room. This is nice and quiet and has better airflow than the stock case fan, but that was pretty cheap so I didn't need much improvement there.
2058606
Works well and is quiet. Had about 2 weeks now.
266157
I've owned this air cleaner for over seven months now and I'm pretty happy with it.
The three settings is my favorite feature. I leave it on the lowest setting for most of the day which is very quiet. At medium its audible so I don't use it too often. The highest setting is pretty loud so I rarely use it, but its nice to have.
2926944
This pump is currently running in my 29 gallon tank.  This is one of the better air pumps I have used, and while it is not completely silent, it is quieter than others I have tried.  The pump is audible over my external filter, though not bothersome.  The design helps to keep the air intake unit above the surface it is placed on, to avoid vibration.  I do find that it is quieter when placed on a solid, dense surface.  I originally had this pump placed on a wooden shelf, and it created too much noise.  I taped it down to the base of my aquarium stand, and that has been the most silent solution I have found.  Air flow is great, and serves the purpose needed.  I have mine powering an air-stone ring, and it has more than enough power.  Make sure you order tubing, as the pump does not come with any.
4726259
A nice compact unit that really pushes a lot of air even on lowest speed. As others have reported in their reviews, it is loud at all speeds. If you can tolerate the noise in your environment, then this will work for you.
1618333
Good air movement, low power use.  I use this in a popup camper when dry camping in remote pastures.  Power draw is very low for the amount of air moved, and sound level is just enough to provide my need for a little white noise without being at all unpleasant on low.
135153
Thus far I am glad that I spent the little extra to get the model with multiple speeds.  Even on low it provides a good amount of air and is very quiet.  At medium and high the amount of air is increased and so is the noise, but not to any unacceptable level.  Installation turned out to be much easier than I thought, but if you are not familiar with doing your own electrical wiring, definitely hire an electrician to assist with that part, and if you're not comfortable with making sure there is adequate space between the studs and up the wall, definitely hire someone with adequate experience.  The air vent does stick our 2 1/2 inches from the wall and is pyramid shaped, which isn't a problem in my application, but could be for some, so pay attention to that.  For what it is worth, I am using a 3-way remote switch instead of a switch on the wall, and that is working well thus far.  Also, I have two of these and the diffuser in the first was bent a bit an the seller promptly refunded the full purchase price after UPS picked it up and I was able to then use my refund to purchase another.
907272
This air conditioning unit works great for cooling smaller spaces, as far as a bare-bones cheaper air conditioner goes.  There are no fancy bells and whistles here but it gets the job done.  It's hefty for a small unit but was fairly easy to install in our kitchen window - a coordinated strong person could manage it on their own, but I opted to balance the air conditioner while hubby installed the screws.  Expandable side panels help cut down on air leaks but I strongly suggest supplementing around your window with foam panels and inserts as needed to help cut down on wasted energy/air loss.  This isn't the most quiet unit, but in the kitchen I don't mind it.  If you're installing it someplace where you want quiet then you might want to consider investing in a pricier model that will be quieter.  We did find that the more secure you install it, the quieter it is - my husband added some wood wedges at the top of the window to help secure and hold everything in place and the air conditioner was definitely quieter once it that was done, just that extra bit of stabilization made a big difference.

The controls are manual and very simple - one dial is your on/off, and you can choose from fan hi/low or cooling hi/low.  I'm a little disappointed that there isn't a 'medium' setting, as there are times that hi seems a bit too cold, and low isn't cold enough.  The other dial is to adjust the thermostat.  The air vent at the top is adjustable for height and direction.

Overall it's a good, sturdy unit and it works well for the area we have it in - even when I've been running the oven and dishwasher and warming the kitchen up, the air conditioner does a good job of keeping things very cool when I have it cranked up on high.
4245783
Great Air Multiplier!!! Very quiet while moving a smooth volume of air...
240233
Great little desk fan.  Quiet, good air flow and takes up little space.
3785300
I bought 4 units of these air purifiers and have been using them in each of my bathrooms for about a month now. (I had to return one of the units for replacement because the UV light is not working.)  I do notice that the air feels cleaner and fresher, and the bathroom odor doesn't seem to linger.  I just don't like the noise level it emits which sounded like the ceiling fan is always on.  But since they are installed in my bathroom and don't hear it 24/7, I don't mind the noise.
2296369
I have used this for about 2 months now in the master bedroom, which is about 400 sq ft.  Of course, I am unsure how well it is cleaning the air, but it does seem fresh.  The lowest setting is really quiet, hardly noticeable. 2 and 3 are quite a bit louder.  I do not like a whole lot of noise when I sleep, so I keep it on 1 instead of Auto, so that when it switches, the louder settings don't wake me up.  If you like white noise, this may not bother you.  I do like the Auto setting, it switches in and out of the levels by what it detects in the air.  This is great for me during the day, the noise isn't bothersome.  I also like that it has a remote control.  Overall, even on the higher settings, this is still quieter than our 2-setting Hamilton Beach purifier that cost about the same.  I like the ionizer, but I do not care for the bright blue light on top of the unit when the ionizer is on.  There isn't a way to dim this or turn it off.  I use a washcloth over it at night.
Overall, I am happy with this and will consider getting the same one for my kid's room.