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Compact 4-stage Air Purifier AUS-0850AAPU

Winix - Compact 4-stage Air Purifier AUS-0850AAPU

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Reddit Reviews:


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Based on 1 year's data from Mar 19, 2026 How it works

Liked most:

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"It wasn't until I upgraded to 2 winix machines that I finally got relief and it was instant."


"they work extremely well"


"My husband and I both suffer from allergies and it definitely helps. ... The tree in our front yard turns my car green with pollen and we have zero issues in the house"

3

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"Winix is a good option for cheap air purifiers that aren't horribly noisy"


"On power 3 it’s barely even audio"


"Quiet."

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"My two Winix units are 11 years old with 24/7 use and still going strong!"


"I have 2 Winix HEPAs that have been running 24/7 for 6+ years."


"They've been running 24/7 for years now (since COVID when I started caring about air quality) and no issues."

12

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"my cheaper Winix outperforms it by a mile"


"They are cheap to buy"


"cheap to maintain"

4

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"We've loved our various models of Winix found at Costco for bunny cage and litterbox."


"I love my Winix especially the feature that tells me when my dog farted before I even realize it (light turns red)"


"completely neutralized the smell of a bunny cage for almost a week (between changes). Bunny and cat pee are similar, so I bet it would work."

Disliked most:

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"The Winix has a light sensor that doesn't allow it to work in auto mode in a dark room. ... If I put mine in auto mode and turn the room lights off it goes into sleep mode which is basically turning it off."


"A window can be open across the house and my Ninja will notice a drop in AQI and speed up the fan while the winix just continues to blow slow. ... I have noticed if I turn the fan speed up on the winix it will notice the AQI change, but that makes the auto mode useless."

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"I just opened up and replaced bearings on one that has been running for maybe 8 years as it got too noisy."


"One became noisy after 3 months."


"it has gotten noisier over time, especially on the “sleep” mode."

5

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"I could buy a brand new unit for the price of 3 replacement filters."


"winix does the same…pre filter, carbon filter, hepa filter….I still had to change the carbon and hepa every six months."


"the filters last 9 to 12 months, unlike the Winix ones that we were replacing all the time."

0

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"Both of my Winix air purifiers started smelling like smoke"


"The 850, however, has very little carbon. It can only mitigate the smallest odors - and only for a very short time if at all."


"The carbon filters in it are trash."

Reddit IconUncleGurm 1.0
r/AirPurifiersWinx air purifier
12 months ago

The 1250 is the Zero+ pro, which has some carbon. The black filter inside is pretty thick and heavy, at least it seems so from the product images. It should provide some gas and odor protection. The 850, however, has very little carbon. It can only mitigate the smallest odors - and only for a very short time if at all.

r/AirPurifiersNever gave a thought to air purifiers until I saw a video where a Dyson cleaned a little clear box of red dyed particulate within a few minutes. Now I’m terrified of all the little things in my air that could harm my kitties.
12 months ago

Yeah sorry if that seemed overly snarky but basically - although most people have stuff in their air, it’s not clear that everyone needs an air purifier. The first question I always ask is what problem you’re trying to solve - if the answer is (as it sounds like) “well I must have stuff in my air”, then I advise you to get a very basic unit and run it in your bedroom with the door closed to see if you notice a meaningful difference. At the $100 price point you could get a Levoit Core 300, of course we tend to recommend jumping up to $150 and getting a Coway Mighty or Winix. But without knowing your actual air composition or any health issues or concerns, all we can do is recommend a general purpose unit. And honestly it may or may not even be necessary.

r/AirPurifiersShark vs BlueAir vs Levoit
7 months ago

1. You don’t really want an app. It is t useful in any way. Why? Because the sensor on the unit isn’t accurate, so the app won’t really tell you if your air is clean. Also because the only way to clean air is to run the unit on a constant speed 24/7. So unless your use case is very specific (vacation home, away for long periods, etc.) then an app isn’t helpful. 2. Shark is junk. Levoit cleans air just fine but is not HEPA, if that matters. Blue air is the best of the three, also isn’t HEPA but has a static generator which bothers some people. 3. Consider winix or Coway. They’re better in every way.

Reddit Iconsnktiger 0.3
r/AirPurifiersNever bought air purifier before. What do you think of this one?
3 months ago

I rather have 3 small winix @ $99 from costco (comes with 2 filters) instead of one big one. air purifier can only filter air that it can suck in. a 1000sqft unit isn't gonna filter air in another room or from the far corner or the room UNLESS you have fan on high setting moving all these airs around.

r/AirPurifiersNever bought air purifier before. What do you think of this one?
3 months ago

more reason to go for winix if it's just for your bedroom. winix is quiet, I can sleep with it's sleep mode, it detects fart too. and you can always return it to costco if you don't like it

r/AirPurifiersThe best 250$-300$ air purifier on the market
4 months ago

3x Winix Air purifier from Costco when they are on sales for $99 each.

Reddit IconLiluLay 0.0
r/CleaningTipsBest way to keep the house smelling good with multiple pets
6 months ago

Air cleaners/purifiers (I have one in every single room, 2 in the open living dining kitchen area). Some brands offer pet specific filters (I use Winix plasma waves in larger rooms, and Levoit for smaller rooms, both the cylindrical and the rectangular). Regular vacuuming. Blankets on furniture that can be put in washing machines. If you have hardwood, minimize your area rugs and mop once a week, if possible. If you need area rugs, try washable rugs you can toss in the washing machine. I have three dogs, a breed that is notoriously difficult to house train. I keep an armada of enzyme cleaners and a black light on hand. They are also a breed that loves blankets, so I use specially formulated enzyme cleaner in the washing machine when I wash their blankets. The washing machine runs daily here.

Reddit IconEmbraceAllDeath 0.0
r/AirPurifiersAre HEPA purifiers really that important?
4 months ago

It makes sense for air purifiers for the same reason it makes sense for face masks- you want the air to be purified in one go. The misconception that some people have is that air purifiers are supposed to reduce the concentration of particulate matter in the room and hence the highest CFM takes priority. In reality, the actual goal is to reduce the concentration of particulate matter that people breathe in, which sounds similar but has a different meaning. A non-HEPA purifier may theoretically succeed at the former, but it won't succeed at the latter; the mechanism of purifying the air through multiple passes with a weaker filter intrinsically means that particulate matter will be blown across the room and into the breathing space of someone before it can be purified. This why CDC/WHO and many other public health will generally recommend HEPA purifiers and suggest non-HEPA purifiers as a temporary measure for emergencies (I.e forest fires). Some good HEPA filter options are Winix, Smart Air, and Jafanda.

Reddit Iconjts916 0.0
r/CleaningTipsBest way to keep the house smelling good with multiple pets
6 months ago

Thirding air purifiers! I finally gave in and traded my two big winix HEPA guys for a gigantic corsi rosenthal box made of four 20x20x4-in home AC filters. It's much louder but the performance is out of this world, and the filters last forever now. My two 1,200sq ft rated filters struggled in my 500sq ft space with even monthly changes (desert life, lots of animals, massive grading project nearby, endless dust), but this one box handles it no problem, and for many months now.

Reddit Icon2plus2equalscats 0.0
r/BuyItForLifeAir purifier that doesn't develop annoying bearing noises
12 months ago

I got annoyed when my winnnix developed a noise, but then I realized it was the unit I’ve been running almost 24/7 for ten years. Bought another refurb and I’m going to attempt to take the ten year old one apart and see if it can be fixed. I imagine there’s buildup at the parts you can’t regularly clean.

r/BuyItForLifeAir purifier that doesn't develop annoying bearing noises
12 months ago

I double checked and it’s my 2019 era one that has the noise! The 2015-ish one is still fine.

Reddit Icon1-800-get-lost 0.0
r/CostcoNeed Help Choosing an Air Purifier from Costco—Totally Lost Here!
9 months ago

Both of my Winix air purifiers started smelling like smoke, they are different models, cleaned weekly and filters changed regularly, I don’t recommend them.

Reddit Icon7Sans 0.0
r/BuyItForLifeThe REAL best air purifier - I HATE DUST!
11 months ago

you can't beat the physics. what you want is the big size as prioirty thing to look for first. then you can look into other things but the size of purifier(filter) has biggest impact. winix is solid imo for basiaclly 99% of the use case.

Reddit IconAdditional-Regret-17 0.0
r/AirQualityCan someone help me decide between these two purifiers please?
3 months ago

I have the Winix. No issues to date. I don’t use the plasma wave feature.

Reddit IconAggravating-Tune6460 0.0
r/AusRenovationAir Purifiers
8 months ago

Definitely recommend Winix. Australian and comes out top of various tests. (If you haven’t been warned- don’t buy Dyson) Super sensitive to more than just particulates and has a ‘pet filter’ that is changed monthly that goes around the main filter and prevents it getting clogged with dust. Helps to prolong its life if you have pets