not too bad, but if you are noise sencetive, you may not be able to fall sleep when it's on "high" mode in your bedroom.
after using this product in my home, we have stop the meds and i sleep much better myself.
the unit has 3 speeds, a steady hum at the highest and the lowest being the most quiet- but i bought it for air cleaning and white noise while i sleep.
it has helped improve my breathing ( i have asthma and allergies) and sleep better at night.
i started out turning on low at night but i've gotten used to the sound and can keep it on medium or high now with no problems.
i just received my air purifier yesterday and had a chance to use it near my bed for one night of sleeping so far.
it took about two and a half weeks before we started hearing a humming sound in the new lifewise ultra air purifier, it went from low to louder to low again (hard to sleep with that).
(the cat sleeps in front of it and probably thinks it is purring.) its too early to comment on filter cleaning,and durability but my early impressions all very positive.
if i am going to work in my home office, i'll move it from the bedroom to my office and put it back in the bedroom for the night.
cannot turn off or dim the lcd brightness which makes it somewhat annoying if you sleep with it on.
the first night we had it running in our bedroom, and we both noticed a difference in how we slept.
also, it's inaudible on the night setting which is important since it's in my bedroom.
the first night we used this product we could tell the air was cleaner.
i bring it to my bedroom at night on the "sleep mode" it circulates the air i wake up much less congested and my room doesn't smell like "pets" even though a 2 dogs and a cat sleep in there too !
i have had it three weeks and i sleep so much better now and i feel better.
i like this item quite a bit, and it sure does do the job - my wife and i sleep very well.
i use it at night when sleeping.
with the machine i can have a break from unhealthy air at least during the night time.
this air purifier works great and i immediately noticed a difference in air quality, so much so that i have even been sleeping better.
my son noticed so much improvement in his allergies and breathing after just two days of use, that when i moved the unit to another room for a night, he begged me to return it to his bedroom.
bought this unit and it has helped with my sleep / congestion at night.
going from the hallway through our door is like night and day.
the purifier is easy to carry from one room to the next and it is so quiet in sleep mode that you can't even hear it when your ear is placed next to the unit.
in sleep mode i can actually sleep and it's still moving a good amount of air.
i cranked it up to the highest fan setting and found that it was quiet enough to sleep with.
lol we all are....oh bty all you hear is the air moving out not the motor...it's relaxing at night too.
i use the one in my bedroom every night and i went from not sleeping well and being all plugged up to sleeping through the night and waking up without a clogged nose.
the other one is in the nursery and baby sleeps!
it helps one sleep as a white noise source.
a real and surprising added plus is that i can sleep better with the system on.
i'm a light sleeper (hence requiring a very quiet air cleaner) and the led was so bright that i had to cover it so i could sleep.
501 cleans the air more thoroughly - i would wake up occasionally coughing before (most likely due to pet dander) - have not had this happen since running the purifier at night on setting "4" of 5.
in fact we would sometimes turn it on for the sole purpose of providing background noise when our kids were sleeping.
it runs very quiet at the two lowest settings and even at the third setting, i found the sound soothing enough to sleep with!
i literally can not hear the new unit on setting 1 (hepa-silent) and setting 2 is barely audible and does not disturb this very sensitive sleeper.
i set it up and ran it (i opted for the pet allergy extra filter) for a few hours that night while she was at work.
the impact since purchasing it: 1) i now breath through my nose when sleeping; 2) my sinuses are clearing up w/o taking any antibiotics.
most of the day i have it on rhythm mode and i put it on auto at night.
it's great "white noise" for light sleepers or to mask unwanted outside sounds.
we also love the "auto" mode and that at night when we turn the lights out it automatically turns off the lights on the unit and the fan to silent mode - which is sincerely practically silent.
i sleep deeply every night.
this product to help with my allergies, but being that i do not live in a air-conditioned environment, i need to keep my windows open in order to stay cool (especially when i sleep at night).
just used it one night and i slept great, and i could smell the difference in air quality plus i've had the best night sleep i've ever had in years.
i leave it running all day and night and it keeps the air feeling pure and clean.
i leave it on in my bedroom when i sleep and can really tell a difference the next morning.
not only is it quite so you can sleep undisturbed at night, the "active" and "turbo" modes are great for during the day and quick changes of air.
since using it in my bedroom i have slept much better( except in turbo mode-it is a little loud, it's only drawback, but who needs to sleep with it on turbo when any of the other 2 settings work fine)
it's not whisper quiet on low, but i find the noise level acceptable and i sleep with it running right next to my bed.
other thoughts: the night setting is almost silent.
we kick the cats out of the bed room at night and turn this on med.
since i have started using the air purifier i have been sleeping so much better ( i have it constantly on,in the low intensity, in my bedroom) and i can tell it is working because some of the dust
i had put it in my daughters room last night who has allergies and breathing problems.
we noticed the huge difrence the very first night we used it.
brought it home, turned it on and had my first night of sleep in going on three years with no sore throat or stuffed nose.
this unit is actually quiet in "quiet mode"--it is unobtrusive in my office, and i believe that i would have no problem sleeping with this on at home.
i was suffering at night from my allergies and this air purifier has helped tremendously.
it's not absolutely quiet, but it has a soothing white noise that you really don't notice at night.
i decided to try the smaller version in my bedroom during my allergy time (april-may) and it made sleeping so much easier.
i've always enjoyed a little background noise when i'm sleeping and this little unit is perfect.
especially when sleeping.
it really did a job on the pet odor from the lab retriever that sleeps in that room.
i am spleeping better as night, because it is in my bedroom.
it actually produces a nice white noise that helps sleepers ignore noises in the rest of the house.
though she has said nothing i have noticed that she is sleeping much better and not having all the respiratory problems she use to have without an air cleaner.
this purchase was to see if the filtration system made a difference in my sleeping since i have severe allergies.
my old honeywell filter was noisy even at the "quiet" setting, which makes it annoying when you're trying to go to sleeping.
i have it in the main living room during the day on auto-mode and then carry it up to my bedroom at night and also run it on auto-mode.
the white noise is perfect for blocking out any street noise so my sleep isn't disturbed.
they are used in the bedrooms and provide a nice "white noise" for sleep as well as cleaning the air.
it has a most wonderful white noise for sleeping and will be easy to pack when we travel.
it has really helped her at night time and cut the dust down in her room.i'm ordering several more for christmas presents!
i sleep better at night with it.
i had been using a very small fan at night, for the "white noise" but i might as well have something that cleans the air.
he can breathe at night and we can even let her sleep with us.
i, not unlike a previous reviewer, am allergic to cats and while i just adopted not one but two in february 2007, i wanted to see if i could get some allergy/asmatic relief in the evenings.
i luv this unit i use it about 4-6 hours a day and keep in on when i sleep with a external timer; not to loud on the lowest setting; overall it would be better if it came with a internal timer, and
the unit is tall but has a small diameter so it ended up taking up very little area on my night stand near my bed...
good (though i wouldn't count on it replacing a normal fan in the summertime even though it's strong), and the white noise is also a bonus for all of you who like pleasant white noise while sleeping.
the highest speed is about a loud as the ac on high, although i slept with it on high last night and didn't notice and i think i'm a light sleeper.
the low setting is just quiet enough that one can easily sleep thru it (if placed in a bedroom.) the medium to high settings are probably going to be a bit too noisy if sleeping.
-i would wake up during the night and in the morning feeling slightly sick and groggy
i i kep tcoughing away for day and night !
i also noticed that my son breathes easier when sleeping (less coughing fits) so i guess it works though i have not had it long enough to see the filter get dirty yet.
at night i left it on "low" between 2 bedrooms.
it puts out just enough noise to help drown out outside sounds, but not enough to keep me awake at night.
we have a relatively small first floor where my daughter sleeps and i must say that she slept the entire night without waking up and coughing for the first time in a year!
it is no trouble to just keep it on a lower speed at night as this is perfectly sufficient to clean the air in a bedroom.
my husband and i are both sleeping better using the air purifier, i believe we sleep better because we are breathing better.
the unit is a bit loud on the highest fan speed setting and found it works best to run it on speed 3 or 4 before i go to sleep and then lower it to speed 1 or 2.
i am experiencing an amazing improvement in sleep quality because my breathing is improved and i don't wake up sneezing every few hours.
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