Winix9800 4-Stage True Hepa Air Purifier with WiFi and PlasmaWave, 500 Sq Ft,Black,Large

I purchased this Winix 9800 air purifier to replace a BlueAir 311 Auto. I was tired of always cleaning that annoying cloth filter on the BlueAir, plus taking that purifier apart to change the filters and reassembling is such a pain. Also, the BlueAir sensor sucks as it only a handful of times in four years ever increased the speed or showed a light other than blue.This Winix air purifier is SUCH a huge upgrade. The product is substantial and very well made. Installing the filters was a breeze and the buttons/app work great. Regarding the PlasmaWave feature, go to the Winix website as the Amazon page doesn’t describe this in detail. The product comes with FOUR replacement charcoal filters (which can't be washed and are supposed to be replaced every three months) plus the HEPA filter lasts a year, so you have what you need out-of-the-box for a full year.The sensors on this Winix air purifier are very sensitive and are constantly ramping up the airflow and turning amber or red. I feel like this is the first air purifier I've bought that actually works!I did a side-by-side comparison of air movement with the BlueAir 311 Auto and the Winix 9800 is about twice as powerful....moves double the amount of air. On the lowest setting there is a slight hum from the unit but it's barely noticeable.Regarding the auto sleep function - the Amazon website doesn't describe this well. The purifier will go into sleep mode ONLY if it's set to Auto and the lights are turned off. If you have the purifier set to a higher speed (meaning not in Auto mode) it will NOT go into sleep mode if you turn the lights off. So for those looking for something that moves a lot of air or creates white noise to sleep, this is for you! Of note is the fact that the blue/amber/red light will not dim unless it's in sleep mode so if the light bothers you while trying to sleep, you'll likely need to turn the purifier away so it's not shining in your eyes.Lastly, before purchasing this I did research for a medical-grade air purifier. IQAir, NuWave and Austin Air were the ones I was considering. In reading online reviews, these products all work similarly, just the aforementioned ones are needlessly expensive (and ugly!). Getting a HEPA filter that can remove contaminants down to .003 microns is what is important and the Winix does this! Of note is the Amazon websites for the Winix products give misleading numbers regarding the actual microns. Look on the Winix website at either the product page or their filter replacement and you'll see that they ALL use high quality HEPA filters that remove particles down to .003 microns.Get this product, it's affordable, elegant, powerful, and actually works!

I’m 100% happy with this purchase. My friend has a $500 fancy high tech purifier, but he’s jealous of mine now. The filters are a standard rectangular size so they’re very affordable. It stands relatively compactly near the wall. Takes up less space and is quieter than my living room fan. I was able to hook up the app with no issue and easily set a schedule. It is WHISPER QUIET!!! Even on turbo it just sounds like a big fan blowing, no loud sounds. After only a day I noticed how clean the air in my house smells whenever I come home. I keep it on auto all day with an hour of turbo scheduled when I’m out of the house (everyone in my home has allergies). I’ll update my review when I get the power bill. I love how the light sensor automatically puts it to sleep at night. This thing is so handy!Now on the bad, I only have 2 smallish issues…The app REQUIRES you to give permission to use your exact location just to use it. I don’t know if that is worth using it to create a schedule. I’ll probably delete it for that reason. I hope they make this optional in the future.And the “PlasmaWave” ionizer is a feature I honestly didn’t notice in the product description. FYI if you don’t know: ionizers put off UV radiation and is not advisable to be used indoors at all. If you have asthma or breathing issues it can make them worse or it can give them to you if you don’t have them. Luckily the UV can be aired out of your home over time or with open windows. Ionizers luckily don’t put out THAT MUCH UV but it’s still not recommended to use at all when you’re in the home. I settled on turning on the plasmawave about once a month for an hour, when I’ll be out of the house for at least 2 hours. Glad that I can easily just turn it on or off.I recommend this product very highly. The price may seem large for basically a big fan with a filter on it, but it’s so quiet and has exactly as many features as it needs. Nothing too fancy. Just a good machine that does what’s needed. I can literally forget that it even exists because it’s on a set schedule and I don’t hear it! So happy to score this well on a large online purchase. :)