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Overall

#263 in

Air Purifiers

according to Reddit Icon Reddit

Sentiment score45% positive
5
3
3

Top Pros

Top Cons

Last updated: Apr 17, 2026

Reddit Reviews

Reddit IconClassic-Pair5805
7 months ago

Theyre definitely worth it, helps my allergies. If I do something small like lightly wipe down my blinds the air purifier can detect the change in the air same as when I change my bed sheets. When I cook its really working. I really have tremendous peace of mind knowing the air I breathe is better for a small investment. It'll sometimes go on turbo unexpectedly. I had only realized why later in the day when I smelled burned barbecue literally a hundred feet away or so when i left my house. If I were you id go on amazon and get a winix t810 for the bedroom. If you have a massive living room like me id get a air mega 450. They look cool too tbh.

8 months ago

Im between the winix t810 and the coway 350 or 450. Its so hard to know what to pick haha

8 months ago

Ended up just ordering a used like new 350 and 450 for pretty cheap. I have a small apartment anyway. Gonna put 350 in my bedroom and 450 in living/dining/kitchen lol

Reddit IconmakkLyfe
11 months ago

Wondering the same. Just got the 450 in the mail yesterday from the deal this week, but debating returning it for the 400 instead if there is good enough reason. My main two reasons are: 1. the 450 has a custom round filter, may be hard to replace long term and cost of filter has not been announced. Compared to 400 has pretty standard filter size. 2. Even though the 450 has higher CADR technically I think it might be because of the Turbo mode, which imo is not really usable as it can only be used when in turbo-only mode. So you might end up with higher CADR with the 400 anyways. But this part I'm trying to confirm. Edit: I just ordered the 400 as well and will return one of them, so will literally compare them side by side

11 months ago

Ended up keeping the 400 and returning the 450. I did take some sound and power readings from both at each speed so I might post those later this week

Reddit Iconron7933
7 months ago

Airmega 50 goes for around 10k around Diwali.

Reddit Iconruckover
6 months ago

I'm a big fan of the Coway Airmax line and got my original recommendation from another pet community. I have both the big square shaped guy and the smaller cylindrical one for a smaller guest room and both keep the smell way down.

6 months ago

It definitely helps with the dander/dust, but it's unfortunately most effective when you change or clean the filters pretty regularly. Don't let Amazon bully you into getting the name brand filters and get the off-brand ones, it doesn't know the difference. I have two short haired but large dogs and one small cat so we have a lot of fur flying around. I clean a good deal of it out of the filters each time so it's surely doing its job! I definitely feel a difference when the filters are new or clean. When they're in the top intensity mode they're a little loud, but most of the time they're whisper quiet at level 1.

Reddit IconUncleGurm
11 months ago

450 is round. New design. Not as good but more trendy.

11 months ago

Higher claimed CADR. It is round so that number will go down rapidly.

10 months ago

Clean Air Kits isn’t HEPA. Does that matter? Maybe or maybe not. But it’s very specifically NOT HEPA. That said, most of Coway’s lineup has no ionizer. The 250/300/400 are excellent machines. (Avoid 350 and 450 as they are round…)

3 months ago

Air Oasis is a mid-grade purifier masquerading as top end, with spurious claims about snake oil technologies - which in my personal book is an instant disqualification from ownership, but it does clean air. IQ Air is arguably the best overall purifier in the world. So… no. There is nothing air oasis will catch that IQ Air won’t. But it does move more air. IQ Air has more filtration stages, and bunch of carbon and catalysts, but its CADR is low due to these factors. That said, for mold literally any HEPA purifier will suffice - there is absolutely no need to spend $1000 on an IQ Air when a $250 Coway cleans more air. What you’re looking for is to move THE MOST AIR POSSIBLE past a HEPA filter. Smart Air Blast might be your answer. Or honestly … strap a MERV13 filter to a box fan. It is trivial for a decent filter to pull mold spores out of the air.

Reddit IconWalla-Expert
3 months ago

I have 3 philips 4000i 1 philips 4200 and a coway airmega 50.

Reddit IconBrilliant-End4664
3 months ago

Id get the Coway Airmega 350/450 for the main living space. The more changes per hour the better. Winix 5510 for smaller rooms and bedrooms.

5 months ago

Coway Airmega 300/400 or 350/450 for larger open spaces. Winix 5510 for bedrooms.

5 months ago

Either one is fine. 300/400 or 350/450. I have the 350 and love it. I'm using it with 2 x Winix 5500-2.

Reddit Icon01JamesJames01
8 months ago

I suggest Coway TrueHEPA ones. Less bells and whistles. More good performance.

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