I am thinking of buying one... how silent are they? I am extremely sensitive to noise while sleeping in the night the slightest humming noise can keep me awake. Also, does the unit have a night light? And if so, can it be covered up? Again, I have light sensitivity! thanks for answering my questions. I am thinking of buying one... how silent are they? I am extremely sensitive to noise while sleeping in the night the slightest humming noise can keep me awake. Also, does the unit have a night... » Read More I am thinking of buying one... how silent are they? I am extremely sensitive to noise while sleeping in the night the slightest humming noise can keep me awake. Also, does the unit have a night light? And if so, can it be covered up? Again, I have light sensitivity! thanks for answering my questions. « Show Less
872430
Katrin, the unit is very silent. It doesn't have the noisey fan like a wet spong humidifier. I don't have a DB rating but it is easy to sleep with.
1989671
It tends to make a gurgling noise as water leaves the tanks, but there is no motorized noise at all.
1989672
Very quiet. It does have a night light that can be turned off. However, if you have hard water I would not recommend because of the white dust.
2277395
It doesn't make a sound when turning on or off. It has a low whirring sound when running but it's very faint so perfect for sleeping. It will last all night too.
1599298
Mine is literally behind my couch and I never noticed a humming noise. I read, listen to music and watch TV in that spot.
1575225
It is noisy like a small fan is noisy. Not sure why other people say it is quiet, because the heater I bought (and later returned) produced noise like a fan. It has a blower within the heater that pushes out the warm air. If you use it at night and you are accustomed to using a fan, the noise might not bother you. But, the orange light is really bright at night. My recommendation is to go to any local store that has a good return policy, buy a similar heater and try it for a few days. Then, you can return it if you like.
155388
If you are standing right next to it in a very quiet room, you will hear, not a click, I guess I would describe it as a quiet hum. I really like these, I love coming home knowing the lights come on a 5PM and off by midnight, the home looks so much warmer. I also used mine this year on the outdoor Christmas lights around the house, I get to enjoy the lights while I fall asleep and I know the timer will shut down after midnight. I highly recommend this product. Be careful, there are very complicated and time-wasting similar products, if you want the lights to change hours every day of the week, you can get some really frustrating one. If you are standing right next to it in a very quiet room, you will hear, not a click, I guess I would describe it as a quiet hum. I really like these, I love coming home knowing the lights come on a 5PM and off by midnight, the home looks so much warmer. I also used mine this year on the outdoor Christmas lights around the house, I get to enjoy the lights while I fall asleep and I know the timer will shut down after midnight. I highly recommend this product. Be careful, there are very complicated and time-wasting similar products, if you want the lights to change hours every day of the... » Read More If you are standing right next to it in a very quiet room, you will hear, not a click, I guess I would describe it as a quiet hum. I really like these, I love coming home knowing the lights come on a 5PM and off by midnight, the home looks so much warmer. I also used mine this year on the outdoor Christmas lights around the house, I get to enjoy the lights while I fall asleep and I know the timer will shut down after midnight. I highly recommend this product. Be careful, there are very complicated and time-wasting similar products, if you want the lights to change hours every day of the week, you can get some really frustrating one. « Show Less
2050721
Yes，it's much quieter than my old one (same brand). Leave it on, it wouldn't bother your sleeping.
2209523
I need absolute quiet when I fall asleep. That being said, it is noisy for me; however, I learned if I turn it on prior to bed time, it won't make as much noise. I turn it on 30 mins before bedtime to get the machine warmed up.
923139
There is a hum but not an annoying hum. My son who is sensitive to sound (like a dog) doesn't seem to mind. I bought this last December, he has it on a timer and it goes on every night, still working a year later.
233308
I always install them in an electronics closet so I didn't pay attention to a noise. However, I am actually going to install one today in about 4-5 hours. send me a follow up question and I will let you know if the one I installed has noise or not.
568790
Yes device is super silent. No sound from it. Not sure about 24/7 because I never did. Maximum time I had left it on continously was 14hrs.
1831381
I have two of these units and they work well, BUT they are noisy! I use them in my workshop, so it doesn't matter, but for sleeping you might consider a portable radiator - very little noise. I preheat my bedroom with a noisy heater and at bedtime, switch to the radiator. Works for me!
269869
It makes a humming noise as all fans do. Now I'm sensitive to noise when I sleep but this one is not so loud so I have no problem sleeping with it on.
968108
Mine isn't silent, but isn't horrible. Sounds like an issue to bring up with manufacturer. They might replace the unit.
1326720
I purchased one about 5 months ago and installed it and it works great but it does have a low humming when its on. You can here it working but its not very loud.
651928
Christopher, I've had one of those in the past and they are great! It's virtually impossible to hear this machine - it is really quiet. I don't know how warm do you want the mist to be, but it does get warm enough for my room and for my taste. It is also really easy to keep clean and is good quality. As an added bonus it has cool blue light around the bottom and if it bothers you - you can shut it off by touching the "cool light" logo at the bottom of the humidifier. Let me know if you need any more info. Alex
2001091
It is not silent and it is not noisy. You can easily hold a conversation while standing next to it. It is quieter than window air conditioners I've been around. If it is running next to the head of the bed while you are trying to sleep, there is no doubt you will know it is there. Will it annoy you? My wife is phonophobic and on low speed it didn't bother her: she described it as a white noise she could overlook.
1237715
It is very quiet! Probably NOT what you want. I use one in each of the two windows in my bedroom and sleep through the low sound without a problem. Why not try a portable alarm with "sounds" (some even have timers), or an app on your phone. My son and his wife use pink noise for their kids. Check out 'sleep noise' on the internet. Very relaxing!