KC850U Air Purifier with Humidifier Combo

We have used this for years in our bedrooms and it really helps with our allergies. I've got the smaller version for my daughter's room. Make sure to get some good quality citric acid to clean the humidifier filter monthly and this thing will last forever. Good food grade citric acid is available here on Amazon and that's what I use, along with a 5 gallon HD bucket. I use the water tank for this thing to weight down the filters carefully so they stay fully submerged. Its not very loud and creates a light white noise for you that isn't too obtrusive. The filters all last a pretty long time and have different change frequencies outlined in the manual. You can get all of the filters from here on Amazon. My allergies are so bad I have to get weekly allergy shots and this really helps. I was also able to get a letter of medical necessity from my allergist so we could claim this on our medical FSA.

I think this air purifier/humidifier is worth the money. You can barely hear it running. The air is so much cleaner. I've noticed my husband and one of our house pets has stop sneezing. Very simple easy to use controls (that I love) easy to fill water reservoir. We have two lap dogs and a cat in the house and its so hard to keep the pet hair swept up. The hair was always blowing around but with the humidity being higher its easier to sweep and keep house cleaner. Love it.

Greatly improves air quality. Purchased via Amazon Prime two months ago, new, for 299. Prices fluctuate a lot on these, and other vendors charge even more. In a dry climate, on high fan speed (I have it in a larger bedroom and as such it really only works on high) you have to refill the H2O tank twice a day. It's worth the hassle. Over the years I've tried Winix, Honeywell, Friedrich, Austin Air, Holmes, and others too cheap to mention. This Sharp has worked the best of the bunch. Not a miracle worker, but does what it says it will. Vastly superior to Winix, no contest. Filters - expensive & not available everywhere. Wish the unit came with at least one extra charcoal filter. 3-5 year filter life seems impossible, could happen if your air is already pretty clean. I'll be surprised if I get two years out of this filter set. Looks great, which is a nice bonus. The color-changing air quality indicator is a very nice feature. The clicking of the Plasmacluster is noticeable on lower fan speeds. The unit is designed & built well. Plastic, but doesn't feel cheap. Recessed handles make it easy to move. Really has improved the quality of sleep in the bedroom.

i've been using this for a day now, i know it's not a fair test i suppose, but if i wait a week i'll probably never review it. anyway i gave this a 4 because i don't like the air sucking from the back, it has no remote, it's expensive, and the lights don't dim when the lights are off, in fact the top ones stay on. i chose this one over winix because sharp invented the plasmacluster and i think they are stronger, and you can turn the stream on. i chose the humidifier because i do need extra moisture in the winter, the hepa showed it had a longer life and you can wash the pre-filter. noise: on low, you can barely hear it, you have to put your ear up to it. you know it's on because plasmacluster clicks. sort of a light ticking sound, like a tiny arc. but constant. on med, its louder, more like a soft computer fan, it's a hush from a distance of about 3' away, like a spring breeze. the cluster however changes tone - on and off in 1.5 second intervals. the sound is similar to that of a quill pen scratching across paper. annoying, but not overly so. you can't hear it from a distance of about 10' but it's there. i was hoping the louder fan (i like a little white noise), would hush it out, but the cluster just gets louder. on max - it's a bit over bearing to listen too, like a hair dryer. on pollen - it surges high and low, like a rolling wave. it's hypnotic and distracting. the instruction are confusing in this mode and quick clean where you need or don't need water in the tank. it seems to work without. on auto, it stays on low unless its needed to be faster. the odor detector works, i had to use it like chloroform and place it in a tissue of the sensor. vinegar made the green light blink. wintergreen alcohol made the unit angry and the lights turned orange to red. so that seems to work i haven't used the humidifier yet, it doesn't hold a lot of water, so i don't have high hopes for this. as an air cleaner the room is fresher - keep in mind for the first 6 hours or so the room will smell like a cross between a dept store and a pool. a deep chlorine smell. it is absorbed by the unit though. plasmacluster has many claims - removes static, makes your skin moister by placing a layer of water molecules over the skin and prevents evaporation (i find that hard to believe). they say it kills some viruses, mold and smells in the air. it can even clean the scent from cloth. i did test that last one, i have a beaver skin that had a perfume scent in it. and in 20 hours that perfume is gone. so if you have a lover that left a perfume note or pillow case - that scent will be gone quickly. someone complained about asthma and plasma - no issues here... however my eyes are very dry. someone mentioned that their air seems to get dryer with the plasma on. and this also seems true. with the door closed in my room, i started with 50% humidity, now it's 40%. which is probably why my eyes are dry. oh and though i mentioned it, turning the lights off only turns the decorations off in the front. not the top lights, though they look dim, they are bright enough to cast green circles on the ceiling. it's rather annoying. i would rather have everything turn off when the lights go out. you still need the panel on to tell you your out of water. though the tank on the side does seem to have a window. the water basin btw looks tricky to clean.

I was in Japan and this brand is used in every hotel . I love it so much I got me one asap I got back to states . I have used so many high end air filtration system but I like this so far .

Purchased this product (KC850U) in 2015 - used about 5 months each year in the hot dry season. Works really well for use in bedroom while sleeping. Now the BAD: my unit still works fine except a Styrofoam Float (bottom of page E-17 in owners manual) is on its last legs. This is an item that needs to be cleaned. I have tried to get a replacement part with no success - so I have a good running machine that needs an inexpensive part and not able to obtain it. Calling SHARP support is terrible, they say they do not sell to consumers and recommend a 3rd party that does not offer the part, and the ones they do have say unavailable. BEWARE customer support for this unit seems to be non-existent. I realize I've had mine a long time, but you would expect them to have parts support for units that are still sold - this unit is still available for purchase here and on the SHARP website.

So many air purifiers in the $100 to $300 range are essentially the same thing: fan + HEPA filter + carbon pre-filter. You'd think for that much money there would be more to it. On top of that the designs are typically more industrial than consumer oriented. While Sharp KC-850U at its core is still just HEPA + carbon prefilter, it's leaps and bonds better in all the other regards than the market norms. Pro: * The embossed front panel design looks clean and modern * It has sensor that monitors air quality and humidity and adjust itself accordingly * LED light's brightness can be adjusted and turned off Con: * The humidifying functionality is rather weak, it's not enough to replace my stand alone humidifier in the living room * replacement filters are expensive, according to the manual the HEPA filter (around $100) and carbon filter (around $60) good for 5 years, humidification filter ($35) is good for 2 years. You can wash the carbon filter and humidification filter, but in my experience they can only be washed so many times before they wear out. * These Sharp air purifiers are far from mainstream, makes me worried how long I'll be able to purchase the filters before they are discontinued I'm tempted to -1 star for the lackluster humidification performance, but the unit is so well designed with great attention to detail comparing to everything else I've seen, it deserves a 5.

We moved from FL to NV and the humidity change really affected us as well as just being in a dusty environment. We put this in our master bedroom and it does a great job to clean the air and add humidity which has made it much easier to sleep. It meets our needs. For reference, bedroom is roughly 20' x 18' with 16' ceilings and a joining 20' x 8' sitting / media room.

The Sharp humidifier has been an exceptional addition to my home. It’s quiet, powerful, and keeps the air perfectly balanced without feeling damp or stuffy. The water tank lasts a long time, the controls are simple, and the air just feels cleaner and more comfortable. It also runs smoothly with no weird smells or noises. Overall, it’s a reliable, high-quality humidifier that works exactly the way it should, and I’m extremely happy with it.

I already have one Sharp KC -8500 but I wanted to have a second one. But just when I ordered it I noticed that there was an other one the KC-8600 which has a larger water capacity. But when I wanted to cancel my first order I was told that my order was already prepared for shipment . Anyhow I like the sharp KC-8500. It is very expensive ( espelely the filters) But you always get what you pay for. I am more than happy with It. Over night I have both running an Auto and you don't hear nothing.

I find this product very good for the money. I placed it in the hall between two bedrooms. It circulates the air quite well and humidifies just enough. Very quite, doesn’t disturb our sleep. The water tank is enough for one days use. Would recommend.

It is extremely quiet, but you do notice the difference in air quality.

Half garbage. I bought it in November 2023 and I'm using it only during the winter as a filter and humidifier. Now there's a noise coming from the electric motor that is used for spinning the water filter inside. Due to that noise I can't sleep in the room when using the humidifier function. For a 700 dollar device that was used intermittently for 2 years, I consider that is a piece of crap. Shame on you Sharp.