LEVOIT Superior 6000S Smart Evaporative Humidifiers for Home Whole House up to 3000ft², 6 Gal, Last 72-Hour, Premium Filter, Dry Mode, Wheels & Water Fill Hose & Foldable Storage – Quiet Sleep Mode
$249.99Original price was: $249.99.$33.99Current price is: $33.99.
Product Warranty: For warranty information about this product, please click here. [PDF ]
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8 reviews for LEVOIT Superior 6000S Smart Evaporative Humidifiers for Home Whole House up to 3000ft², 6 Gal, Last 72-Hour, Premium Filter, Dry Mode, Wheels & Water Fill Hose & Foldable Storage – Quiet Sleep Mode
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Brandon –
Almost perfect
Let me start by saying this is an excellent humidifier! It does an incredible job of keeping my ~1,000 sqft. 2BR apartment humidified. I’m extremely satisfied with how effectively it will humidify my place that can get as low as 15-20% without humidification.Now, the area for improvement: The improvement could really come from Auto Mode on the Vesync app and how it integrates with the smart features of the humidifier. An unfortunate flaw with the Auto Mode is that it does not allow you to select your own preferred humidity level. It has 2 settings (home and away). The humidity level of these settings are dependent on the ambient temperature in the room as read by the humidifier, which always is about 5F degrees lower (most likely because wherever the sensor is on the unit is being influenced by the damp cooler air coming out of the machine). In my opinion, this falsely causes the humidifier to run at the 60% humidity level on the “home” setting for Auto or 55% setting for “away.” Personally, that’s a bit more humidity than I’d like to have in my place with nighttime outside temps in the teens Fahrenheit already in December. It just causes too much condensation on the windows. I’d prefer that I could manually “set it and forget it” on the Auto Mode at 50% and minimize the window condensation. By no means is this a deal breaker, but it’s definitely an area of improvement the app developers should do to the auto mode where it’s selectable by the user instead of having default humidity levels based off the incorrect ambient temperature. I have reached out to the company to see if this is something their developers could work on, so hopefully they’ll be open to the feedback. Looking at some of the few reviews that there are so far, it seems like there are others that share my thoughts.The app and humidifier do have a function where you can manually select the humidity level you’d prefer and it will maintain that level. I’d liken this to a hybrid manual/auto mode. The only caveat here is that you have to set your own fan speed and it’s either on or off. It doesn’t cycle through lower or higher speeds to just maintain your desired humidity level like an auto mode would. I’ve found myself using this feature since the auto mode is just unreliable with the temperature readings influencing the auto humidity levels defaulted by the software. My Levoit 300S humidifier’s auto mode setting is perfect from the Vesync app, so I’m hoping the developers will create an option for a user-selected auto mode and then the 6000S will be perfect. I still rated it 5 stars because it does everything it’s designed to do extremely well. The manual does say that Auto Mode will maintain 50% if not connected to the Vesync app (which would solve all my auto-mode woes because all I want to do is set the thing to 50%) but I’m a bit of a tech geek and love data, so I’d prefer to keep the capability of monitoring everything remotely while I’m away just to ensure everything’s working correctly.For anyone who made it this far in my review, don’t let what I’ve mentioned discourage you from buying the unit. I think this could be a pretty simple software/firmware fix if it were something enough people requested and found to be somewhat problematic with the current app and humidifier settings. Even despite the auto mode issues, the app and unit itself has tons of functionality that really make it a great product! Albeit a bit expensive, but I have faith it will last quite a long time. Seems to be well-built, overall and I have not have had any leakage issues like some others have mentioned in their reviews.
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e-Mule –
Almost Shockingly Good
I ordered this as a replacement for a failing Honeywell humidifier in a room where we store wine. We live in high desert and the humidity is typically below 25% and often 10% or below.I settled on the Levoit 6000s after considering several units of similar size. Unpacking it, this seems like a well built and very well designed humidifier. The capacity should be more than up to the job of keeping our room “wine comfortable” long enough to account for any time we are away.I’ve only had this running for three days now, but a couple of things impress me. First, it is quiet as compared to the other humidifiers I have used. Noise is not really an issue in the room this is used, but the difference is noticeable. Second, the humidifier does an excellent job of keeping the humidity near what I have set, as measured by a separate sensor located on the other side of the room. According to that sensor, the Levoit 6000s maintains the humidity level and is very accurate.The faucet hose attachment that is included is a nice feature. Lugging water containers back and forth has always been a dreaded chore, and this will eliminate the need for that.I’m not generally a big fan of app-controlled features on appliances, but the app for this product is pretty good. The main thing I use it for is checking up on it, but it is easy enough and has not thrown any fits. It’s a good feature.After this short of time, the unit also seems efficient. The water usage is less than the old Honeywell unit while maintaining the humidity level. I saw another reviewer say this humidifier is doing the work of two of his old units, and I think that is consistent with the efficiency I have seen so far.The Levoit 6000s is about twice the price of the other units I looked at, but thus far I think it exemplifies the old saying, “you get what you pay for.” Assuming it holds up (and from the way it is built, I expect it will), this is the best portable humidifier I have owned.
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Amazon Shopper –
Super effective, convenient, and noisy
I’ve owned many humidifiers, and this ranks easily as the very best. It effectively humidifies 1000+ sq ft, is easily controllable via the smart app, and requires minimal maintenance. Sure, the filters have to be changed periodically, but this is true of any quality humidifier – I don’t count that as a negative. I love that the tank holds enough water to last at least 3 days even in the driest environment, and the smart app allows easy convenient control. In summary, this is no doubt the best humidifier I have ever owned. Now, the negative…. The fan has 2 speeds: “low” and “hairdryer/vacuum” high. There is no medium – it’s either silent or “hairdryer in the background” high. Also, the app is sufficiently advanced/convenient that you would expect it to understand when the water level is too low for the pump to work, but it does not. When the water level falls below the pump depth, it just runs on high indefinitely as the humidity falls, until you get annoyed at the noise and wonder “why is my humidifier not humidifying properly?”Overall, 4.5 out of 5 stars. But adding a “medium” fan setting and water-level sensitivity could make this a truly 5-out-of-5 star device.
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J. Jones –
Updated review at January 3, 2024:After almost 1 month of constant 24/7 use of my 6 Gallon LEVOIT Smart Evaporative Humidifier for up to 3000ft², I learned from the company I purchase this machine’s filters from that the discolouration – even after just 24 hours of use – is totally normal and an expected result of filtering out impurities in the water used. So that’s a relief that it’s not growing algae on the filters. Actually, after using 100% distilled water in my humidifier for this past month since that first fill of municipal tap-water, the filters have not shown any further discolouration. So no doubt the distilled water will likely extend the life of the filters, and possibly the machine as well.But….after a cost-analysis of using Distilled Water vs, tap water in this humidifier, it’s more cost effective and practical to just use tap water.It would cost me $1,700 per year in Distilled Water (as the machine is averaging 32 Litres per week). So even if using tap water in the humidifier cause more wear and tear and build-up resulting in (worst case scenario) needing to replace the filters monthly (at $107.26 CAD including taxes and delivery) and yearly replacement of the humidifier at $346.50 CAD (includes taxes and free delivery), I’d still save $70/year and wouldn’t have to haul all the jugs of Distilled Water to use in the humidifier! So I feel it’s economically worth the risk to use tap water in this humidifier, and if I can stretch the rate of filter and machine replacement, I’ll save even more money yearly.I’ll update this review if I learn anything further. For now I’m extremely happy with my cute little robot-looking Humidifier I’ve named “Robbie”, haha!——-My original review:My 6 Gallon LEVOIT Smart Evaporative Humidifier for up to 3000ft² is already growing algae on the evaporative filter media after only 24 hours of use of this brand new machine.The humidifier was delivered by Amazon at 3:30pm December 8, 2023. I immediately unpackaged, filled it with tap-water as instructed and started it on the highest speed to see how long it could boost my humidity levels from their current 10% in my home and to see how it performs after going through a full tank of water.We’ll it sure does humidify the air really well in my 1100 square foot residence. Within just 3 hours my humidity went from 10% to 35% (I am using a separate hygrometer to determine the accuracy of the actual humidifier’s humidity gauge which does appear to be very accurate after 1 day of use at least). After 8 hours it was up to 58% humidity.It used a full tank of water (21 Litres/6 Gallons) in 24 hours of use on the highest speed by 4pm December 9, 2023. When I went to refill it, I had a good look at the evaporative filter media and it is already turning green in spots and the residual water at the bottom of the humidifier’s tank was very visibly yellow in colour.My municipal water in my city is among the very best quality water in the world (I live I Edmonton, Alberta Canada and we have award-winning water quality…and I work with water quality specialists who have confirmed this), so I observed the water was clean and clear going into the humidifier.I have since opted to fill the humidifier this time with 100% distilled water and I’ll see if it makes any difference to the algae growth I’m seeing on the filter.I bought this evaporative humidifier because of its claims to produce healthier humidified air as the filter is not sitting directly in water all the time – instead water flows across the filter and evaporates so the filter shouldn’t be growing algae – especially within just 24 hours of use!I’ll update my review when I’ve had a chance to determine if the distilled water is solving the algae growth issue with this humidifier’s filter.
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mccoytmh –
We bought three of these thinking that they would be fantastic. We filled them up and plugged them in and they run for three or four seconds and then they all shut off and say there is no water. Started a warranty claim with the company, and we hope that they will refund us the money. Not good at all.*Updated review:Manufacturer’s (Levoit’s) Customer Service telephone line started the claim process. Had to email the manufacturer a video of empty tank malfunction red light icon and also the Amazon pdf invoice. Heard by email from Levoit from the claims department the next day. Agent recommended to wait for about five days for the tech department’s updated firmware available via the VeSync app. Also provided us the option to cut the cords and send a photo of the cut cords to start a replacement process. We opted to wait for the firmware update. It actually worked! Once the new firmware was installed via the VeSync app to each of the units separately, the pump did finally start to bring water from the tank below to the upper tray to drip onto the filters to make them wet and hence evaporate the water with the fan’s airflow. *Note that it is necessary to be persistent in restarting the unit several times (between 6 to 20 times, actually!) before the pump is primed and starts to deliver the water as it should. USE MANUAL MODE WITH FAN SET TO HIGHEST SPEED. (Speed 9 on the app, or 3 fan icons on the dash.) We almost gave up several times. But patience paid off. Once the pumps were finally primed in this way, the product works extremely well. The design and the build is smart and of excellent materials. The functionality is excellent. The fans are smooth and quite quiet, a gentle background white noise.It was an anxious ordeal having invested in three units at once and having none of them function, at first. Customers Service at Levoit was reasonable and their firmware update saved the day. Levoit SHOULD stipulate very clearly, though, to PERSIST IN POWERING ON THE HUMIDIFIER UNTIL THE PUMP IS PRIMED. Eventually you can hear the first trickle of water coming up into the top tray. Only then are you home free.Now we love the product as we expected we should. But it was a trying experience, to be honest.These machines raise the humidity level quickly compared to other types. We got this evaporative model after having bad experience with the white dust from the sonic misting types.Seriously, despite the initial frustrations getting it going, we love this new Levoit model with its big tank and intelligent design. Love it!
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Jack –
This humidifier does indeed humidify a large room quickly. However, my first humidifier started making a loud, piercing noise just a few months after purchase. I contacted customer service and received a replacement under warranty. After waiting two to three weeks in dry air, the new unit finally arrived.At first, it worked fine, but within less than a week, a part securing the fan fell off. That part is now stuck inside the fan, and I don’t think it’s safe to use the device anymore. We are currently in contact with customer service again, and I will post here for further updates
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Amazon Customer –
I’ve been using it almost daily during the winter times and the performance is top notch. As like any other humidifiers, it requires regular maintenance. However, with the simplistic design, the maintenance is straight forward and easy. The only downside is replacement of filters which can be quite expensive in the long run, but the wide coverage the humdifier provides, I’ll willing to pay for it time to time. Overall, good humidifier with reasonable price.
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Joel AC –
The humidifier worked fine from February to May this year. When I tried to use it November 9 2025, the red light kept coming on which indicates something is plugged and the water cannot be sensed or accessed so the unit shuts off. I’ve gone through the troubleshooting instructions three times and nowhere did it come up with what I eventually found to work.The humidifier top, D in the diagrams, has to be positioned correctly over C, the wick filter frame, which I had correctly. After soaking everything in vinegar for an hour or so, it still did not work. Then it occurred to me that there is a small tube in the top that matches up with the water pump tube – that’s why the instructions say to put the top on facing the front of the humidifier with the water gauge.I took the top off, turned it over, and looked at its tube and added a few drops of vinegar into it a few times and scoured it out with the handle of a crochet hook small enough to fit.Put the top back on the base, turned it on and voila the humidifier worked. Nowhere in the instructions is this possible place of blockage mentioned so there is no instruction on how to unblock it.In the meantime, I purchased another Levoit Superior6000S US, with the extended warranty, which arrived by email Nov 9th.So, because of the missing maintenance information I’ll now have two Levoit humidifiers, same model, with an extended warranty on one I won’t have to use for who knows how long so the warranty is useless to me.Not good information by Levoit.Three stars for being a good humidifier – loss of two stars for poor instruction manual and no customer support on weekends.
$17.99Original price was: $17.99.$14.99Current price is: $14.99.
17%
LEVOIT Superior 6000S Smart Evaporative Humidifiers for Home Whole House up to 3000ft², 6 Gal, Last 72-Hour, Premium Filter, Dry Mode, Wheels & Water Fill Hose & Foldable Storage – Quiet Sleep Mode
Brandon –
Almost perfect
Let me start by saying this is an excellent humidifier! It does an incredible job of keeping my ~1,000 sqft. 2BR apartment humidified. I’m extremely satisfied with how effectively it will humidify my place that can get as low as 15-20% without humidification.Now, the area for improvement: The improvement could really come from Auto Mode on the Vesync app and how it integrates with the smart features of the humidifier. An unfortunate flaw with the Auto Mode is that it does not allow you to select your own preferred humidity level. It has 2 settings (home and away). The humidity level of these settings are dependent on the ambient temperature in the room as read by the humidifier, which always is about 5F degrees lower (most likely because wherever the sensor is on the unit is being influenced by the damp cooler air coming out of the machine). In my opinion, this falsely causes the humidifier to run at the 60% humidity level on the “home” setting for Auto or 55% setting for “away.” Personally, that’s a bit more humidity than I’d like to have in my place with nighttime outside temps in the teens Fahrenheit already in December. It just causes too much condensation on the windows. I’d prefer that I could manually “set it and forget it” on the Auto Mode at 50% and minimize the window condensation. By no means is this a deal breaker, but it’s definitely an area of improvement the app developers should do to the auto mode where it’s selectable by the user instead of having default humidity levels based off the incorrect ambient temperature. I have reached out to the company to see if this is something their developers could work on, so hopefully they’ll be open to the feedback. Looking at some of the few reviews that there are so far, it seems like there are others that share my thoughts.The app and humidifier do have a function where you can manually select the humidity level you’d prefer and it will maintain that level. I’d liken this to a hybrid manual/auto mode. The only caveat here is that you have to set your own fan speed and it’s either on or off. It doesn’t cycle through lower or higher speeds to just maintain your desired humidity level like an auto mode would. I’ve found myself using this feature since the auto mode is just unreliable with the temperature readings influencing the auto humidity levels defaulted by the software. My Levoit 300S humidifier’s auto mode setting is perfect from the Vesync app, so I’m hoping the developers will create an option for a user-selected auto mode and then the 6000S will be perfect. I still rated it 5 stars because it does everything it’s designed to do extremely well. The manual does say that Auto Mode will maintain 50% if not connected to the Vesync app (which would solve all my auto-mode woes because all I want to do is set the thing to 50%) but I’m a bit of a tech geek and love data, so I’d prefer to keep the capability of monitoring everything remotely while I’m away just to ensure everything’s working correctly.For anyone who made it this far in my review, don’t let what I’ve mentioned discourage you from buying the unit. I think this could be a pretty simple software/firmware fix if it were something enough people requested and found to be somewhat problematic with the current app and humidifier settings. Even despite the auto mode issues, the app and unit itself has tons of functionality that really make it a great product! Albeit a bit expensive, but I have faith it will last quite a long time. Seems to be well-built, overall and I have not have had any leakage issues like some others have mentioned in their reviews.
e-Mule –
Almost Shockingly Good
I ordered this as a replacement for a failing Honeywell humidifier in a room where we store wine. We live in high desert and the humidity is typically below 25% and often 10% or below.I settled on the Levoit 6000s after considering several units of similar size. Unpacking it, this seems like a well built and very well designed humidifier. The capacity should be more than up to the job of keeping our room “wine comfortable” long enough to account for any time we are away.I’ve only had this running for three days now, but a couple of things impress me. First, it is quiet as compared to the other humidifiers I have used. Noise is not really an issue in the room this is used, but the difference is noticeable. Second, the humidifier does an excellent job of keeping the humidity near what I have set, as measured by a separate sensor located on the other side of the room. According to that sensor, the Levoit 6000s maintains the humidity level and is very accurate.The faucet hose attachment that is included is a nice feature. Lugging water containers back and forth has always been a dreaded chore, and this will eliminate the need for that.I’m not generally a big fan of app-controlled features on appliances, but the app for this product is pretty good. The main thing I use it for is checking up on it, but it is easy enough and has not thrown any fits. It’s a good feature.After this short of time, the unit also seems efficient. The water usage is less than the old Honeywell unit while maintaining the humidity level. I saw another reviewer say this humidifier is doing the work of two of his old units, and I think that is consistent with the efficiency I have seen so far.The Levoit 6000s is about twice the price of the other units I looked at, but thus far I think it exemplifies the old saying, “you get what you pay for.” Assuming it holds up (and from the way it is built, I expect it will), this is the best portable humidifier I have owned.
Amazon Shopper –
Super effective, convenient, and noisy
I’ve owned many humidifiers, and this ranks easily as the very best. It effectively humidifies 1000+ sq ft, is easily controllable via the smart app, and requires minimal maintenance. Sure, the filters have to be changed periodically, but this is true of any quality humidifier – I don’t count that as a negative. I love that the tank holds enough water to last at least 3 days even in the driest environment, and the smart app allows easy convenient control. In summary, this is no doubt the best humidifier I have ever owned. Now, the negative…. The fan has 2 speeds: “low” and “hairdryer/vacuum” high. There is no medium – it’s either silent or “hairdryer in the background” high. Also, the app is sufficiently advanced/convenient that you would expect it to understand when the water level is too low for the pump to work, but it does not. When the water level falls below the pump depth, it just runs on high indefinitely as the humidity falls, until you get annoyed at the noise and wonder “why is my humidifier not humidifying properly?”Overall, 4.5 out of 5 stars. But adding a “medium” fan setting and water-level sensitivity could make this a truly 5-out-of-5 star device.
J. Jones –
Updated review at January 3, 2024:After almost 1 month of constant 24/7 use of my 6 Gallon LEVOIT Smart Evaporative Humidifier for up to 3000ft², I learned from the company I purchase this machine’s filters from that the discolouration – even after just 24 hours of use – is totally normal and an expected result of filtering out impurities in the water used. So that’s a relief that it’s not growing algae on the filters. Actually, after using 100% distilled water in my humidifier for this past month since that first fill of municipal tap-water, the filters have not shown any further discolouration. So no doubt the distilled water will likely extend the life of the filters, and possibly the machine as well.But….after a cost-analysis of using Distilled Water vs, tap water in this humidifier, it’s more cost effective and practical to just use tap water.It would cost me $1,700 per year in Distilled Water (as the machine is averaging 32 Litres per week). So even if using tap water in the humidifier cause more wear and tear and build-up resulting in (worst case scenario) needing to replace the filters monthly (at $107.26 CAD including taxes and delivery) and yearly replacement of the humidifier at $346.50 CAD (includes taxes and free delivery), I’d still save $70/year and wouldn’t have to haul all the jugs of Distilled Water to use in the humidifier! So I feel it’s economically worth the risk to use tap water in this humidifier, and if I can stretch the rate of filter and machine replacement, I’ll save even more money yearly.I’ll update this review if I learn anything further. For now I’m extremely happy with my cute little robot-looking Humidifier I’ve named “Robbie”, haha!——-My original review:My 6 Gallon LEVOIT Smart Evaporative Humidifier for up to 3000ft² is already growing algae on the evaporative filter media after only 24 hours of use of this brand new machine.The humidifier was delivered by Amazon at 3:30pm December 8, 2023. I immediately unpackaged, filled it with tap-water as instructed and started it on the highest speed to see how long it could boost my humidity levels from their current 10% in my home and to see how it performs after going through a full tank of water.We’ll it sure does humidify the air really well in my 1100 square foot residence. Within just 3 hours my humidity went from 10% to 35% (I am using a separate hygrometer to determine the accuracy of the actual humidifier’s humidity gauge which does appear to be very accurate after 1 day of use at least). After 8 hours it was up to 58% humidity.It used a full tank of water (21 Litres/6 Gallons) in 24 hours of use on the highest speed by 4pm December 9, 2023. When I went to refill it, I had a good look at the evaporative filter media and it is already turning green in spots and the residual water at the bottom of the humidifier’s tank was very visibly yellow in colour.My municipal water in my city is among the very best quality water in the world (I live I Edmonton, Alberta Canada and we have award-winning water quality…and I work with water quality specialists who have confirmed this), so I observed the water was clean and clear going into the humidifier.I have since opted to fill the humidifier this time with 100% distilled water and I’ll see if it makes any difference to the algae growth I’m seeing on the filter.I bought this evaporative humidifier because of its claims to produce healthier humidified air as the filter is not sitting directly in water all the time – instead water flows across the filter and evaporates so the filter shouldn’t be growing algae – especially within just 24 hours of use!I’ll update my review when I’ve had a chance to determine if the distilled water is solving the algae growth issue with this humidifier’s filter.
mccoytmh –
We bought three of these thinking that they would be fantastic. We filled them up and plugged them in and they run for three or four seconds and then they all shut off and say there is no water. Started a warranty claim with the company, and we hope that they will refund us the money. Not good at all.*Updated review:Manufacturer’s (Levoit’s) Customer Service telephone line started the claim process. Had to email the manufacturer a video of empty tank malfunction red light icon and also the Amazon pdf invoice. Heard by email from Levoit from the claims department the next day. Agent recommended to wait for about five days for the tech department’s updated firmware available via the VeSync app. Also provided us the option to cut the cords and send a photo of the cut cords to start a replacement process. We opted to wait for the firmware update. It actually worked! Once the new firmware was installed via the VeSync app to each of the units separately, the pump did finally start to bring water from the tank below to the upper tray to drip onto the filters to make them wet and hence evaporate the water with the fan’s airflow. *Note that it is necessary to be persistent in restarting the unit several times (between 6 to 20 times, actually!) before the pump is primed and starts to deliver the water as it should. USE MANUAL MODE WITH FAN SET TO HIGHEST SPEED. (Speed 9 on the app, or 3 fan icons on the dash.) We almost gave up several times. But patience paid off. Once the pumps were finally primed in this way, the product works extremely well. The design and the build is smart and of excellent materials. The functionality is excellent. The fans are smooth and quite quiet, a gentle background white noise.It was an anxious ordeal having invested in three units at once and having none of them function, at first. Customers Service at Levoit was reasonable and their firmware update saved the day. Levoit SHOULD stipulate very clearly, though, to PERSIST IN POWERING ON THE HUMIDIFIER UNTIL THE PUMP IS PRIMED. Eventually you can hear the first trickle of water coming up into the top tray. Only then are you home free.Now we love the product as we expected we should. But it was a trying experience, to be honest.These machines raise the humidity level quickly compared to other types. We got this evaporative model after having bad experience with the white dust from the sonic misting types.Seriously, despite the initial frustrations getting it going, we love this new Levoit model with its big tank and intelligent design. Love it!
Jack –
This humidifier does indeed humidify a large room quickly. However, my first humidifier started making a loud, piercing noise just a few months after purchase. I contacted customer service and received a replacement under warranty. After waiting two to three weeks in dry air, the new unit finally arrived.At first, it worked fine, but within less than a week, a part securing the fan fell off. That part is now stuck inside the fan, and I don’t think it’s safe to use the device anymore. We are currently in contact with customer service again, and I will post here for further updates
Amazon Customer –
I’ve been using it almost daily during the winter times and the performance is top notch. As like any other humidifiers, it requires regular maintenance. However, with the simplistic design, the maintenance is straight forward and easy. The only downside is replacement of filters which can be quite expensive in the long run, but the wide coverage the humdifier provides, I’ll willing to pay for it time to time. Overall, good humidifier with reasonable price.
Joel AC –
The humidifier worked fine from February to May this year. When I tried to use it November 9 2025, the red light kept coming on which indicates something is plugged and the water cannot be sensed or accessed so the unit shuts off. I’ve gone through the troubleshooting instructions three times and nowhere did it come up with what I eventually found to work.The humidifier top, D in the diagrams, has to be positioned correctly over C, the wick filter frame, which I had correctly. After soaking everything in vinegar for an hour or so, it still did not work. Then it occurred to me that there is a small tube in the top that matches up with the water pump tube – that’s why the instructions say to put the top on facing the front of the humidifier with the water gauge.I took the top off, turned it over, and looked at its tube and added a few drops of vinegar into it a few times and scoured it out with the handle of a crochet hook small enough to fit.Put the top back on the base, turned it on and voila the humidifier worked. Nowhere in the instructions is this possible place of blockage mentioned so there is no instruction on how to unblock it.In the meantime, I purchased another Levoit Superior6000S US, with the extended warranty, which arrived by email Nov 9th.So, because of the missing maintenance information I’ll now have two Levoit humidifiers, same model, with an extended warranty on one I won’t have to use for who knows how long so the warranty is useless to me.Not good information by Levoit.Three stars for being a good humidifier – loss of two stars for poor instruction manual and no customer support on weekends.