COWAY Air Purifiers for Home Bedroom up to 1,035ft² with Washable Filter, True HEPA Filter for Smoke, Pollen, Dander, Smell Air Purifier with Air Quality Monitor, Auto Mode, 3yr Warranty, 150, Green

I bought a 230 in Sage Green in September of 2023, around the time they first released. It has been running 24/7 at speeds 1-2 since then, with negligible stopped time. I have been pleased with it, so I finally bought a replacement filter for that one in April 2025 (approximately 18 months on a single filter) and purchased another 230.Long story short, this air filter has proven reliable, appears to be reasonably (and anecdotally) responsive to changes in air quality, is aesthetically pleasing, and is easy to maintain. Cost of entry is fairly low, and cost of operational maintenance (time, ease, filter cost) is also comparatively low.I currently run two of these Coway 230's and a Blueair 680i for a 1250 sq.ft (116 m²) apartment. Adjacent units' air leaks into our unit (shared compressor and vent), which means food odors, tobacco (and "other") smoke, and sometimes mildew/mold. The building was built in the 1970s, and there are issues with leaking roofs, poor ventilation in the underground parking, etc. We also have cats, which means litter dust, litter smell, and hair/dander. Of course, we also produce our own air pollutants, like cooking odors or aerosolized products. The Coway has done very well in whichever room it's in, reducing odors and dust. It's fairly quiet at all speeds, although 3 is the maximum fan speed and is loud, though not at all intolerable. There have not been any unusual noises, like squeaks or vibrations. The pre-filter is easy to clean with a vacuum or with water, and helps keep the primary filter media free of large debris like clumps of cat hair. The filter media itself is very large and has a lot of pleats, which means more surface area, for lower load on the blower (more efficient and less energy consumption) and more overall filtration capacity (longer overall life before loss of efficiency).Compared to the much larger Blueair, there are some observations that people may like to know:The 680i is significantly larger, designed to perform five air changes per hour for a 770 square foot (72 m²) room. That means that even at the lowest speed, it will generally outperform the Coway, which can perform the same number of air changes in a 403 square foot (38 m²) room. I believe that most air purifiers measure their air changes at the highest blower speed. A larger unit will have a larger blower, which means running the 680i at the lowest and nearly silent speed will still be moving as much air as the Coway at the maximum and loudest speed. For those sensitive to noise or with a need to minimize ambient noise, it may benefit you to oversize the filter for your application.The prefilter is a win for Coway. I have to vacuum the filter in the Blueair monthly to make sure it's not blocked up with debris. It can be heard as buffeting at the blower output. The cats like quality time in the bedroom, so there's always hair.While I haven't cut up the Blueair filter, it is dimensionally smaller than the Coway filter. One may cautiously assume that they deliver equivalent performance as they are both HEPA. This is not an accurate comparison of filter efficacy, since surface area and static pressure, and as a function of those, dwell time of air through the filter is a good measure of filter performance. Basically, I like big filters with lots of frontal surface area. Coway draws air through almost the entire front face. The Blueair draws air from one side to the other, which means a smaller filter intake area.The Blueair body is made of die stamped, powdercoated steel. It's heavy duty and durable, but weighs at least twice the Coway. It even has casters. Durability of the housing may not matter to you, but the Coway is a bit flimsy. This is not a concern to me, but something you may want to consider.The Blueair is a clamshell design, and when you open the rear side, it swings out so you can access the filter and interior. To replace the filter in the Coway, you pop off the front shell. It's easy, but the clips are plastic and the shell is flexible, perhaps too much so. If you were to be clumsy, you may damage it.The air quality indicator on the Coway is extremely bright. It can be switched off, which is a considerate feature. The Blueair lacks this. However, it's nothing a bit of tape can't fix.The smart function on the Coway will run the blower at an extremely low speed or it will shut off if the air is clean and has stayed clean for a long time. The Blueair will run continuously on the lowest speed.

I only purchase Coway air purifiers cause I trust their quality and what it’s made for. I have one 150 model and 300S model. I got my parent a 150 for the bedroom and a 250S model for living room. I’ve recently just got this 230 model. 230 is the best from all the ones I have and my parent. The reason why I like this one the most is because it really cleans any smell and really cleans the air. The reason I got this is because the Eaton fire in LA and were pretty close. Air got in and smells like smoke and if it smells like smoke inside the house, there’s going to be a lot of toxic stuff. So it’s hard to cook when we have to close windows and I had to seal the fireplace and a window near the kitchen so cooking is hard due to the smell. Anyways I had to cook and this model cleaned out the smell and air less than an hour. The air it blows out is pretty strong and goes quite far. I had put it between the kitchen and living room which is not big but it does what it’s suppose to do. It’s not loud but there’s sound. The sound is bearable. But I assume it has to make some kind of sound because the air blows good generous amount so that’s got to use some kind of power. I had put on level 3 for the smell of fire the first day. Next day, the living room and kitchen hardly had any smell of smoke. It has clean and sleek design and I like it’s not so chunky. It’s a good size. It’s bigger than the 150. I also like the buttons are not complicated. It’s easy to use. The tap on the buttons are sensitive and easy to touch. The one little round light to show it’s on or off and air quality is bright enough to let me know it’s on. It’s not that bright that it bothers me. Has timer, sleep mode, smart mode. All those functions are useful and not complicated to understand. If I need to buy another air purifier, this will be the model I would get. I usually prefer to buy one that provides more square footage than the space I plan to use.

Its running now. Sort of a white noise. Now that its warmer out side it keeps a breeze in the room.And the filter gets full of dust.

Really good quality and sturdy material.Looks classic, and work fine so far, and can easily see the change in quality of air. Even it sense automatically and run fan speed based on how bad quality of air will be.Removing filter and looking how dirty it is easy.Good to have around I see VOC dropped from 200 points to 35points.

This is almost a year since I first purchased. I think there’s a big difference in the air quality in my home. Seasonal allergies have come early again and with a vengeance. I had several days of bad allergies this week and when I checked the pre-filters they were full of dust! I had started using allergy meds (pill, eyesrop, nasal rinse and nasal spray) but they were not helping much. It’s been many months since I last cleaned the prefilters. After cleaning them, plus keeping windows closed and mostly staying indoors, it seems my allergies have calmed down.These are very quiet and I love them. I have 2 for a 1,400 sf house (one for each floor). 4 stars only because the control panel is difficult to read unless there’s good light to see the button icons. I wish they were illuminated or something. But otherwise I love them!

Coway makes the best air filters. I have a couple others from Coway and they’ve all been really, really good. This one does especially well in a home with dogs who shed constantly. Helps keep the air clean and the space feeling fresh.

Effective and aesthetic

My favorite air purifier I own and I have a purifier in every room. Has a quality sensor, pre filter, carbon and hepa filter. Helps capture the dust and husky hair!