LEVOIT Air Purifiers for Home Large Room Up to 1980 Ft² in 1 Hr With Air Quality Monitor, Smart WiFi and Auto Mode, 3-in-1 Filter Captures Pet Allergies, Smoke, Dust, Core 400S/Core 400S-P, White

We purchased one of these on sale in the hope it would help moderate the severity of pollen season in upstate NY and the dander generated by two large labradors. It has a nice, clean look and small foot print, which we feel is important.The HEPA filter was shipped inside it in a bag that needs to be removed but doing so was incredibly quick and easy to do. Twist the top a quarter turn and place to one side. Lift out the filter, remove the bag, lower the filter back in using the two tabs provided on it for that purpose, lift the lid back on and quarter twist to close. It takes 2 mins. Then its’ plug-in, turn on and choose “”Auto” or a fan speed using the touch sensitive panel on top. You can control it from your iphone if you’re into that but it certainly isn’t necessary.The first thing we noticed is how quiet it is. Effectively soundless in sleep mode and at fan speed 1. Barely noticeable at fan speed 2, unless you’re right next to it, noticeable at fan speed 3 when you are in the same room as it but not obnoxious. Noticeably louder at fan speed 4 which should be considered a ‘Turbo” mode. Then we noticed the impact of running it – vastly reduced swelling of the eyes and sinuses of those suffering from hay fever and a significant reduction in the doggy smell of our labradors. It works really well.We have taken advantage of the ability to control this by iPhone to set a schedule where it automatically runs in sleep mode (low, continuous fan) from 10pm to 5am. Then at fan speed 2 from 5am to 5:30am, ramping up to fan speed 3 from 5:30am to 8am before switching to auto from 8am to 10pm. Because of the relatively severe allergies suffered by a couple of our family members the P2.5 micron threshold is set to 2 ug per meter cubed and this filter has been able to attain that incredibly low level with that schedule within a few hours of all windows and doors to the outside being closed to the 1800 sq. ft area it services. At this point we have an oasis for our hay fever sufferers to return to each evening and it’s made an incredible difference to their comfort. Do they still take Claritin or Allegra during pollen season? Yes, we’ve found it necessary to deal with the pollen at work and in the garden. Are they doing better than they were before we got this filter? Yes, the continuously swollen and itchy, weeping eyes are gone. The inflamed nasal passages are gone. Their sleep deprivation is gone. Their quality of life has improved dramatically. We had no idea how dramatic an impact adding a quality, appropriately sized HEPA filtration system would have. This unit is rated for something like 3000 sq. ft. We’re using to control air quality in a 1800 sq.f.t open plan area and its doing a great job of that without having to run the fan at high speed for prolonged periods of time.We’ve had this for several weeks now and experienced 1st hand how well it can deal with really terrible air quality when the smoke from the fires in Quebec blew into NY. Opening the door to come into the house with the shopping during the worst of it briefly dropped the air quality from a PM2.5 of 001 to as high as a PM2.5 of 185 within 12 feet of the door. This was then quickly reduced to a PM2.5 of less than 20 in an hour and back to 001 in about 2 hours after the door was closed. The outside airs PM2.5 was apparently North of 300 at this time (sources accuweather and the news), the air was literally a hazy brown like smog and this filter was able to detect it, automatically adjust its fan speed to clear it and maintain perfect air quality in the house.Does it work? Absolutely, quietly and brilliantly.Would we buy this again? Yes, in fact we have so that we can control the air quality for one of our allergy sufferers in another area where they have to spend prolonged periods of time. That one’s been in place for about 3 weeks and has done exactly what we hoped it would do – improve the quality of life at work in a 7000 sq.ft. open plan office area. Now this is well beyond the manufacturers claimed coverage for a unit and it looks like they’re right based on who’s apparently benefiting and who isn’t but here’s the important point. The benefits to the workforce have been so noticeable to management they’re now considering upgrading the offices HVAC system to include HEPA filtration. I think that speaks volumes.

First of all from reading the reviews on this machine is deceiving because most of the reviews are for the 400 machine, not the 600, although the 600 does have favorable likes, from all the positive reads on this machine it sounded almost to good to be true, I already have 5 air cleaners in the house ranging from $160-$600 not to mention a whole house filtration electrostatic cleaner, what I liked about this machine is that it has a drum 360° filtration Hepa 13 filter..very easy to clean and change out, the machine is almost silent until you move up to speed #3, where this machine falls short and fails in its highly Touted AirSight Plus ‘’Laser Smart Sensor’’ technology claims to be so accurate is 2x as accurate as an ‘’infrared laser , great claim only the one I purchased, only detected 5ppm for the first minute than dropped down to 1, that was in our den, than I decided to put it in our bedroom, thickly piled carpet lots of traffic same exact results started out on 5 than dropped to 1 again, same thing in the spare bedroom, living room than I ever shook the pets planet he sleeps on, I know it’s full of dust and dander and shook it right up against the sensor…same exact result, another 5 than after a min it dropped to a 1, than I took it down into the basement again 5-1 reading, than finally opened the big sliding patio door and put the machine right up against the screen , it’s got to show a different reading than 5-1…but no, so there is an astronomical coincidence all of the rooms I tested this in, my den, living room, bedroom basement and then outside all had the same exact reading, or it’s not functioning correctly so I called Amazon customer service and they Concurred and sent me out a replacement so I just received it, brand new, opened it today set it up and immediately again the sensor started out on 5 and within a minute dropped down to 1…this machine has a major major major flaw, it’s AirSight Plus technology is not working properly, I’ve seen YouTube videos showing detected readings as high as 80+ ppm and than the longer the Levoit 600s unit ran, that number would drop down until eventually red (bad air quality) ring dropped down to yellow than the blue ring (good air) was finally present, so somewhere these are working, and I also took the replacement machine in 4 different rooms plus the pets bed shake test and patio screen door test…again all rooms plus outside air 5-1 , not 5,4,3,2,1, it would 100% of the time go from 5-1, another defective unit, I hope this is an isolated situation but I have a feeling I will be returning the replacement also.Update;I sent the first one back within the 30 days, Amazon sent me out a replacement, this one works as promised, the laser smart sensor works as described, I have had it now for over 3 months and it has been working like a charm, once again Amazon has amazing customer support they took back the first one and in two days had the replacement just wanted to give it sometime before doing another update, this is my favorite easy to use efficient air cleaner yet, the 360° filter is so easy to replace I have asthma and this has helped me breathe much better, if they made one of these even bigger with this type of circular drum filter, I would buy it in a heartbeat

I purchased the Levoit Core 400S air purifier for my living room, after being satisfied with its smaller version (300s) for my bedrooms. The air purifier is elegant, silent, and user-friendly. It features a three-stage filter system that consists of a true HEPA filter, a pre-filter, and an activated carbon filter, all integrated in one circular filter that easily mounts in the bottom of the device. It can capture 99.98% of airborne particles and eliminate odors, as well as remove pet hair (depending on the filter model). It is remarkably light for its size, and has built-in handles.The air purifier can be controlled with their smart app (Vesync) that allows you to operate it remotely and monitor the air quality. The app also offers some handy features like scheduling, timer, and child lock. The air purifier has an auto mode that adjusts the fan speed based on the air quality using a laser sensor. It also has a sleep mode that lowers the noise and dims the display. The 400s can also be controlled via voice using smart assistants such as Alexa or Google Assistant.The display, located on the top of the purifier, shows the speed, air quality level, and the filter status, which is very convenient. The air purifier can cover rooms up to 403 sq. ft., which is ideal for my living room that has high ceilings.If you encounter any issues, you can contact support directly through the Vesync app. They can assist you through emails and follow-up phone calls.My only concern is the cost of new filters, which usually need to be replaced every 6 to 8 months, depending on the usage and the air quality settings. The replacement filter costs about $45.Overall, I highly recommend the Levoit Core 400S air purifier to anyone who is looking for a smart, efficient, and stylish air purifier. It has improved the air quality in my house.

I have owned this product for less than 24 hours as of this writing. More updates as I have more to say/remember to do them. Also, I will be very verbose, the sort of in-depth information I want when I am researching products over $99 for purchase, so you really know what’s going on. Hopefully it helps, but it may be TL;DR for some.My background: I am not a smoker and never have been. I was raised by a chain smoker and have spent the majority of my life around second hand smoke from parents, family and friends. I have stress induced asthma and have also been through experimental chemotherapy that has apparently permanently damaged my lungs. Over time, my lungs are slowly degrading, and as they do I become more and more sensitive to more and more things, which trigger my lungs to get irritated and produce phlegm to coat my lungs and prevent the irritation, which causes me to cough more and more over time. (It has been a lot of fun having this sort of lung disorder during the pandemic, let me tell you.)”Well, why don’t you see a doctor then?” you may reasonably ask. My experience with doctors in the past has consisted of watching both my mother and grandmother die with (no joke) 30+ prescriptions each all at once (with 3 to 5 doctors all prescribing simultaneously and admitting to me in private that A) they were not consulting with one another, and B) nobody on earth could possibly keep track of the side effects of so many prescriptions at once), and my uncle wasn’t far off that number when he died. I also have repeated personal experience with the medical industry that strongly supports my experience and belief that going to the doctor is going to be a financially insane choice (whether or not I have insurance) that I get little to nothing out of regardless. So I choose to avoid doctors and the medical/drug big business establishment like the plague whenever possible.When I realized recently that my lungs were noticeably irritated all the time when I was in my own home, but I was fine if I went outside, I decided it was time to step up my game. Enter this unit, which I researched before buying.My unit is brand new, not a returned unit. Upon turning it on, it told me that my air in all areas of the house tested was as good as it gets, with a reading of 001. This did not please me, because I know it’s nowhere near that good. So I did an update of the firmware to see if that would fix the issue, and it did. The new display read 005, which was significantly lower than I expected, but the unit reduced that to 3, then 2, then 1 relatively quickly.Within about 15 minutes, the air in my (door closed) office started to smell noticeably different. Lighter, cleaner, fresher, more neutral. I was surprised. I also noted that over the next few hours, my coughing decreased significantly as long as I stayed in my office.When bed time came, I put the unit in my bedroom and turned it on full blast with the doors closed while I went to the kitchen to have a snack. At first, the bedroom registered 5. The unit quickly brought it down to 1. I noted that my coughing increased when I was in parts of the house that had not had the benefit of this device to clean the air.Returning to my bedroom after my snack, I noted that once again, there was a nice difference in how the air smelled in my bedroom compared to my kitchen.Normally it takes me a while to stop coughing enough to fall asleep when I got to bed each night, but last night while there was still coughing before sleep, it was markedly less, which my girlfriend commented on today. This morning, I woke up to the pleasant realization that my lungs did not feel irritated for the first time in a long time. I hadn’t even realized how irritated my lungs were when I would usually awaken until it was gone.Moved the unit into my home office again, and turned it back on. It started at 5, and again rapidly cleaned the air until it was at 1. Then I began doing more experiments. I noted that when the AC kicks on, it goes from 1 to 2 or 3. When it turns off, the unit returns it to 1. When I open the door to my office, it goes to 2, and then back to 1 when I close it. When my cat walks into my office, it goes from 1 to 2 if I close the door after him, and stays there for as long as he is moving around. If I pet him, it goes to 3.Thinking this level of sensitivity was too good to be true, I decided to try further experiments. I closed my office door again, waited until it settled down, and sprayed some air freshener in my office. No change – it evaporated. Just as expected. Then I went down the hall and into my living room and lit a stick of natural compressed sandalwood powder incense. I returned to my office and closed the door. Within 2 minutes, this unit detected the incense in the air, rising to a 4-5-6 and then back to 3 when the AC turned off. The next AC cycle, it jumped into the teens, and then into the 20’s, 30’s, 40’s as the smoke got going during the next cycle. When the count hit 45, it turned the ring green and stepped the fan up a notch.I found that I could watch the numbers go up when the AC was on, and down when it was off. It got up to around 86 at one point, and the ring sometime before that turned orange and stepped the speed up another notch. Now that the incense has burned out, it’s dropping, with highs in the 50’s, and lows i the 20’s and cycling lower each time the AC kicks on again. It’s been interesting to see it power up and down to match the particulates in the air.Build quality seems good, but the bottom can come off easier than I’d like. A couple times now I have tried to lift it only to find that it had un-screwed and the bottom and filter were not lifted with the rest of the unit. Easily fixed in a second or less, but if the bottom had a bit of “click into place”, this would not happen when moving the unit.It is so quiet in sleep mode that last night when we went to bed, after I had it running on high for a few minutes while we had our snack before bed, that even three feet from it, my girlfriend could not tell if it was running and asked. This was with the AC not active. That’s pretty darned quiet. It also was no issue for me to handle, and I am extremely sensitive to sound when I am trying to sleep.The top two levels of fan speed are relatively loud, with the highest speed being louder than my AC when it’s kicked in. It is, however, the most smooth and beautiful white noise I have ever encountered, and I am an audio engineer.So far my experience with this is almost entirely good. Here;s what I don’t like.1. The bottom unscrews too easily. No big deal, but irksome.2. The sensor didn’t work when I got it until I updated the firmware, which forced me to download the app, sign up, and then give the app location permissions and blue tooth permissions. I also naturally had to sign it into my wifi network. I didn’t want to use the app, or give the app these permissions. The app, however, will not run without them. Ostensibly, it uses location data to give you a report on local 2.5um particulate levels in your area (which it does), but I don’t know what else it is being used for, and I don’t much like having my location tracked by Google and every other company on earth these days.So far so good. It appears that particulates in my house are probably not as much of an issue as what those particulates are made of, and that I need to be more focused on reducing VOCs in the air in my house. But so far this unit has helped me breathe significantly better, and I’m very happy with how well it works.

This air purifier is so amazingly quiet, you can just plug it in and forget it! I love the ring of lights on top of the purifier that lights up blue when the air quality is excellent, green for when the air quality is good, and red when the air quality is bad. There is also a digital readout of the particle count in the air, for those who want a more exact information.I use the automatic setting so I can truly forget about it. When I was making brunch that included bacon, the ring of lights turned red and the air purifier automatically kicked into high gear. Then the air purifier automatically adjusted it’s fan speed as the air particle count lowered. The amazing thing is the air purifier is on the other side of my house from my kitchen!I purchased the air purifier because my husband was suffering from allergies. Given that the pollen count was currently low and mold count was high for the area we were living in and the time of year, we suspected that mold spores in the air might be the reason for his allergies. However, when the air purifier arrived and we set it up, it showed that the air quality in our house was good. Honestly, I don’t know if this means that the air purifier didn’t sense mold spores, or that we actually had no mold spores in our house. However, I am happy with the quality of the air purifier and how well it works for smoke from cooking and our wood burning stove. So we are keeping it.One thing that prospective buyers may want to keep in mind is that the instruction states that the air purifier should have a clearance of 15″ on all sides. This means that you can’t just put it against the wall, like I had originally intended. But I supposed this would be true for all air purifiers as air circulation is needed.