Coway Airmega 400S App-Enabled Smart Air Purifier (Covers 1,560 sq. ft.), True HEPA Air Purifier with Smart Technology, Compatible with Amazon Alexa and Google Home, White (111012)

I love a lot about this air filter. I really like the smart features. I originally thought they would be gimmicky, but after living with it for a few weeks I have experienced the value. I love that it detects the airborne contaminants, and increases air circulation to clean the air. I’ve noticed that it increases air flow during high traffic and vacuuming, among other things. I like that I can check the app for air quality, and I can see past air quality as well. I like that the filter knows when it’s bedtime and decreases airflow, in order to keep noise pollution down, for quiet tearfulness. Now on to effectiveness. We have a nearly 3000 square foot new construction home. It’s about three years old. Most of our air contaminants likely come from area construction, as well as a year round growing season, with year round pollen and similar contaminants. My oldest child has had a persistent hack for the last couple of years. I would not really call it a cough, so much as a hack. Every few minutes he would do a throat and lunch clearing cough. It never seemed short of breath, just seemed to be clearing an irritant. We took him to doctors, who suggested everything from allergies to asthma. We sort of ruled out asthma because he is athletic, and has no issues out working other children, and displays no unacceptable shortness of breath, other than what you expect, and recovery times are quicker than normal. As a previous asthma sufferers myself, that does not resemble asthma to me. We opted to try daily allergy medications, and they seemed to help some, but did not eliminate that dreaded hack. Now I said all of that to say this. Since we added this filter, we hardly ever hear him clear his lungs. I’m actually surprised, because I assumed it would take much longer. I figured he had been doing it long enough that it was a habit by now. But after a few days of filtering, his symptoms diminished, and after a week or so, he almost never does it. Now our home is nearly double the size of the the filters rated coverage area. But the design of our home, I think, allows one unit to work. Our central air unit has only one air return, and it is at the blower unit. This is located centrally, upstairs, in a closet with a vented door. The area around that closet is sort of an open landing area, that opens to a large family room. I think what is happening is that the filter can clean large volumes of air, that then get circulated through the house. The dirty air is then pushed back up to that open area, and filtered by the unit. The unit can tell when air is clean or dirty, and increases, or decreases circulation, accordingly. Anecdotally this seems to be a successful test, eliminating our primary concern. The side benefit is the remainder of our family is now breathing cleaner, healthier air. It just took one sensitive member to illustrate the need. I wish I had known this would solve the problem, and I wish I had done it sooner. I expected to need to units to have a successful result, and I’m so pleased that one unit does the job. Not every home may have the same results. Some may actually need two units to do the job. Also, I opted to shop the amazon warehouse deals and save a bunch of money. I bought a used acceptable condition unit. It arrived in a generic box, but everything was still protected by the factory foam, and cling wrap. Everything appeared new, and worked perfectly. If you want to save s big percentage, I highly suggest checking out the warehouse deals. If your displeased with the condition, Amazon has a very generous return exchange policy. My filters in my unit looked brand new and unused. But if I were concerned, new filters are about $100, so you could still have significant savings, even if you opted to put brand new filters in it right away. At first I was put off by what seemed like a high filter cost. Then I recognized what I was spending on allergy medication each month, for one child. The filters provide clean, allergy free air for the whole family, at a fraction of the cost of allergy medications for one child. By reducing our allergy medication costs, we can replace filters as needed, an no added cost. I would have thought building a new home would prevent these issues, but the other new construction in the area, seems to exacerbate the issue. I also weighed the option of an Aprilair, or air bear system on our central air unit, but I was concerned about the designed air flow for our system, and any disruption could shorten the central air life, increase energy needs, and decrease overall home comfort. Those air filters work great for a system designed and tuned for their use. But for a system designed for a more or less open fiber filter, it could cause problems. So I decided a stand alone filter would be the better option. Also those air handler systems that go on your ariconditioner unit, are not usually helps rated. The AIRMEGA 400s is. And it is constantly monitoring, and cleaning the air. It also uses no harmful ozone. I’m an ozone fan, and I own an ozone generator. But I like to use it in specific situations, under controlled conditions, when all occupants can be out of the house. I don’t want ozone to be a part of my primary home air filtration system. Others may have different priorities, and I encourage you to research the benifits and precautions, and choose according to your needs and priorities.

This is a great air purifier! Been using it for about a month now and no issues at all. Wi-Fi is solid if you have great connection. I have an Orbi Mesh system so I never have an issue with connectivity. Alexa voice command works fine, but limited to Power and Fan Speed. You can’t ask Alexa for air quality status or what current unit mode is. App works great. Will notify you if air quality changes. You can control the unit with the app, check filter status, and also set schedules if you want. Level 1 is practically silent. Level 2 is louder, but doesn’t interfere with being able to hear things. Level 3 is pretty loud. Sensor works fine. If it detects unhealthy air (cooking, candles, pets) it kicks up to Level 3 right away and gradually goes down as air improves. You can adjust sensor sensitivity through the app. Pre Filter must be washed around 2-3 weeks. Main filters are rated to last 1 year, but I can’t attest to that yet. After 1 month, my main filters are down to 88%. Make sure the left and right sides of the unit are not being blocked and do not put it against the wall or furnitures. These two sides are where the dirty air is sucked in and clean air returns from the top so don’t put anything on top of the unit either. If the sides are blocked, the unit will not run efficiently so try your best to place them free of all obstruction. You can put the back of the unit against the wall, just not the sides. My only other advise after doing some major research on air purifiers and getting the most benefit out of one is to leave it running 24/7 without depending on Smart Mode. This is the only way you can guarantee clean/fresh air because it will never enter Sleep Mode and wait for a trigger. I leave mine on Level 2 from 7am until 2am. Then I have it run on Level 3 from 2am until 7am when we’re all asleep upstairs in the 2nd Floor so we don’t even hear it. Yes my pre filters get dirtier faster, but that’s the point right? To eliminate air impurities as much as possible. One last thing. The circle lights of the filter status indicator on the unit decreases as the filter gets down in increments of 20%. So at 80%, 1/5 of the circle is off and half the circle is off at 50%. Some think this is the LED dying already. It is not. It’s actually a feature so you can quickly see directly on the unit if the filter needs cleaning/replacing. The light completely turns off when it’s down to 0% and the word “Clean/Replace” turns red. Once you clean/replace the filter, you can reset it and the entire button illuminates again by holding it for 3 seconds. I think that covers it all pretty much.

No entiendo todos los comentarios que dicen que no sirve la aplicación. No he tenido ningún problema. Excelente producto. Muy silencioso. Me ha bajado mucho la alergia

I did a lot of research on air purifiers before settling on this one (400S). After purchasing it I have to say I'm extremely impressed. Build quality is fantastic, it moves a lot of air through it, on the low settings it's super quiet (and still move good air). I was able to connect it to my AmpliFi mesh network no problem, I didn't have any of the connection issues others have experienced. The scheduling works very well. There's a very small bug in the scheduling if you are trying to do things specific (too long to go into it in the review). But I have been in contact with Coway and they are working on the fix right now. Their customer support is amazing, fast replies and very friendly. The sensor works great. The 1st one we got is in the Master bedroom, so once we start making the bed in the morning it will sense the "dust" coming off the bed and will kick into medium speed. Even just moving around it will sometime kick it into medium because you are kicking up dust from the carpet (which can hold a lot of dust). So it knows when the air isn't 100% perfect. We liked it so much that we purchased a 2nd 400S for our Living Room/Kitchen (open concept house), we have 2 indoor cats (that don't go into the bedrooms). And a 3rd (300S) for the basement to go beside the cat litter box. We went with a 300S for the basement because of the light sensor on the 400S (300S has no light sensor), it's dark in the basement and the 400S would stay in Sleep mode all the time, which is not what we want, we want SMART mode all the time in the basement. I believe Coway is also working on the ability to disable the light sensor on the 400S through the app, but it's not available yet so we went for the 300S. I don't use the light sensors on the 400S either, I have the schedule turn them completely off during the night because in sleep mode they move a tiny amount of air (to be extremely quiet), not enough to really do a lot in our house, so there's no reason to keep them on. If you have really bad air it's probably good to have them keep working even at a reduced capacity, but our air is pretty good, I just wanted them to help with some of the dust and also a way to monitor my indoor air (through their app). Very happy with them so far.

produto muito bom e silencioso na velocidade 1

Great product , I've been using the air mega 400S for about a month now . It moves a lot of air quickly. and my allergies are much better . The auto setting works perfect also the phone app is cool and works good although the outside allergy update for my area on the app does not work , it say's not supported in my area , not a deal breaker for me , I live on Vancouver island. Very powerful unit . I was more interested in power and the ability to clean a lot of air as I live in a 1600 square foot house but am pleasantly surprised in the refinement and build quality . At full speed it isn't to loud , usually it comes on and only needs to go to medium speed to get the job done and is very quiet . At low speed and sleep mode you cant even hear it . The house smells fresher and I am breathing better now . I bought another one for a friends place yesterday as she suffers with allergy's also. Over all very happy , Everything is better than I expected !

Le niveau de bruit est celui auquel on s'attend; on entends rien au premier niveau, un peu de vent à la position 2 et finalement, le bruit de l'air déplacé au troisième niveau, les feuilles des plantes dans le salon bougent alors comme si nous étions au vent dehors. Au lieu de passer l'air dans un seul coté/filtre, l'air entre et passe par deux pans en même temps pour ressortir vers le haut, doublement efficace. La gestion automatique est super, l'appareil détecte les situations problèmes et s'ajuste jusqu'a l'assainissement. Il y a aussi une cellule qui détecte le soir et rends plus silencieux. L'interface est Wi-Fi et non Blue-tooth. On peut ainsi controler et prendre des informations comme la qualité de l'air du bureau et tout controler. La partie statistique est peu crédible, et au Canada, le fabriquant n'a pas ajusté la prise de statistiques régionales aux graphiques d'analyse qu'ils ont aux USA. Belle machine, la couleur blanche est dur à agencer.