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

Whole home humidifier
This is a review after having for 2 weeks.Background about me: I looked around at many different options for home humidification. Where I live in the North East, summers are usually hot and humid and fall and winter tends to be very dry. We had a particularly dry spell at the end of October, which lead to sinus issues and I needed some relief. I thought of getting a professionally installed humidifier for my central air system, but decided against that as running a water line to the attic which would be prone to freezing was not acceptable. I also looked at portable steam humidifiers but the choices were limited and not great. So, an evaporative humidifier it is.I have a large space; room-sized humidifiers don’t do anything because of forced air heat (I have a venta airwasher which I am going to retire), so I needed something with a lot more oomph. I’ve tried ultrasonic misters in the past, and they are novel, but generally don’t do a good job. The Levoit 6000s fits what I wanted. A humidifier that can work for my whole house (~2000ft²) and doesn’t need constant filling and attending. In this super low humidity time of the year, 6 gallons lasts maybe 36 hours. The machine actually evaporates that much water, it is pleasantly surprising. RH increases rapidly up until about 45%, then it is slower as it diffuses.Seems to cease increasing the humidity once RH is about 60% and the temp is around 70F. Which is fine, 50% RH makes your nose happy and doesn’t make everything feel damp. A steam humidifier might over humidify an area.The unit stops operating with about 1/2gal left in the tank. The water at this point turns yellowish, due to calcium being left behind. I also notice when the water level starts getting very low, and the humidity is somewhat high, you’ll hear a slight tricking sound as the water from the pump isn’t evaporating on the pads and is dripping back into the tank. Its not obnoxious though.Automatically shuts off when the water level is too low to continue. Has 3 fan speeds. I leave it on 2 as it just disappears into background noise. Speed 3 is a bit loud, I measured around 41db from 1m away. Speed 2 is below 30db, my meter won’t read it. You can also turn off the lights, so if you are a light sleeper this won’t bug you.Power usage on fan speed 1 is 3 watts, speed 2 is 8 watts, speed 3 is 21 watts.The bottom line is, this works great for your whole house, even with forced air HVAC, it has a lot of nice creature features you’ll appreciate, and doesn’t seem to need a lot of attention. It brings the humidity to around 50% quickly, but don’t expect it to bring the humidity much above that on speed 2. Generally, that’s the sweet spot for happy nose and skin anyway. The design is resistant to leaks and spills. If you can lift it in and out of your sink or bathtub go for it, otherwise it comes with a silly hose thing to fill it.Update: a few months later. This thing still rocks. I added a screenshot of an independent analysis of how fast this can throw the humidity out there. I replaced the pads with blue ones, and it’s working just fine. Keep up with the mold and mildew growth, otherwise it starts to smell and can give you allergies. Run the unit dry and let it sit empty and dry for a few days every now and then. I bleach the pads and just dump a little bit of bleach in the unit every so often (like a couple tablespoons). It makes everything smell (like bleach) for a while, but it does the trick with sanitizing everything in the machine. Suggest doing the bleach treatment in a garage or other space where you won’t be breathing it.

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.

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

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.