CowayAir Purifiers for Home Large Room Up to 1,860 ft², Washable Pre-Filter and True HEPA Filter for Smoke, Allergies, Pet Dander, Odor, AQI, Smart & Rapid Mode, Timer, 3yr Warranty, 250

I did not make this purchase out of want ??? I'm very, very sick (have been for more than a year) & I needed something effective & affordable. WORST THING? I moved into new apt. only to find my ground level unit sits right next to the main drier vent. Because it's ground level, what flows in is almost impossible to get out, and hot drier air flows in & down. I almost gave up/ I did lots of research (enough to learn what I feared)??? I'll tell you what that is in a moment. You have to do deep research on a product like this/ there's so many options & most are useless (I'm sorry but it's true). I always read until I find those rare technocratic users who truly put products through their paces. THE TRUTH? Many of the high reviews for a majority of the available units are inspired by digital features (lights & listed options). It seems the old honeywell units were legit (really pulled dust, etc.)? But? They've become flimsy & flawed (even filters no longer seating well)... I never saw one of these COWAY units listed among either "featured" products or through "highest review" search option??? A real & smart user did a head to head with multiple brands & was truly impressed with COWAY. I punched the company name in (didn't even know what they looked like)... This product is exceptional in every way. It truly hauls air through one very large multistage filter (only 1 needed as replacement yearly). It claims to do a 900ft sq. room, & I believe it. PROBLEM? A unit is only as good as the convection it can create/ This is limited by irregularities in ANY space—lest you're buying a hulking industrial unit. I'm sicker than I wanna discuss here, I'm not an average user & the stakes are deadly serious. Before I even purchase this unit, I spent 2 days in the new apt. setting up fans & feeling the currents & air flow such that if I found an appropriate unit—I'd be able to effectively cycle all air through it. I say again, I almost gave up (I could easily see one MOSTLY must buy a larger, more industrial value unit if one has truly serious problems—and I don't have the money for such a purchase). THIS UNIT DOES NOT HAVE THE "S" DESIGNATION/ IT DOES NOT UTILIZE WIFI... NO—THIS IS A GOOD THING??? WHY WOULD YOU EVER NEED THE FEATURE & IT ADDS $100 TO THE PRICE... AND? IT'S BEEN MESSING WITH PEOPLE'S WIFI MORE GENERALLY (taking it down—in fact). There's a pre-filter screen & it works. The computer keeps track of the air volume. I started to notice eye irritation the other day & I cleaned the pre-filter (EASY PEASEY). The next morning? The light indicating time for the precise cleaning was on... IT WAS RIGHT ON THE MONEY!! The main filter is massive with a micro-fit (set in easy & snug across all sides/ no loss of seal anywhere). I think the replacement is $26 & you only need 1 every year... CRAZY/ SO MUCH CHEAPER TO OPERATE ON TOP OF REALLY CLEANING LOTS OF AIR. Pulls smells fast & effectively. It keeps track of the air quality & it works (it tells you when something is introduce into the air via simple active color bar). I've been running it in highest haul setting. I brought the fan down to medium yesterday & the slowed air-flow seemed to find even more particulates (I have air moving fast everywhere with fans & I think slowing down a bit helped—ironically). On top of everything else—it's an elegant looking model. It doesn't look like—or try to be—a smart-buddy (like some smart pod with lots of useless lights). I've been poor most of my life & when I do make a purchase, I do my research. I don't have money to burn & the stakes are very, very high for me (carbon monoxide is building in my blood, suffocating me slowly & horribly). I'm fighting for life/ I need anything that can help CUS I have emphysema already & nobody really knows why 02 is accumulating? Probably a black mold infestation in last apt... WHAT A PRODUCT/ I WISH I COULD SAY I'D BUILT IT... I've done a bit of inventing in my life. I'd like to think that if I did build an air purifier? it would look & function just like this... GET IT !!! SERIOUSLY...

Keeps air clean and it's a good size, not too big or too small. Since it has a nice design, it blends in well with my furniture/decors without sticking out like a sore thumb like a lot of other air purifiers on the market.

Perfection. Beautiful, quiet, strong.

So far it has worked really well. I like the air quality light on top, seems to be accurate but not sure why blue is best not green? The only problem I had was the unit seemed to vibrate loudly at random times during the night and wake me up even on low speed. If you tapped it, the noise went away for a while. My solution was to grab two tiny magnets and stick them back to back on each side of the front screen. This has completely fixed the issue. I suspect you could glue a small weight inside and it would also work. Seems odd the manufacturer did not fix this problem. Other than that, its great!

This is absolutely my favorite air purifier. I tend to rely on HEPA alone instead of units with ionizers. The aesthetic design of this feels timeless, so I can appreciate it anywhere be it the kitchen or my living room.I have an open floor plan that contains both the entryway, kitchen, office space, and living room. I keep this unit in the kitchen since I don't have a range hood vent yet, so I rely on this to reduce the cooking fumes down. It definitely helps and I noticed a difference in air quality. It kicks into gear whenever I'm cooking, as I set it on auto mode.After I had a good experience with this air purifier, I decided to share it with my family. My dogs literally sneeze every time they enter my parent's house. After my brother purchased one for their home, the conditions improved significantly and all of our allergies are under control. We know it works.Finally, my most recent experience is what seals the deal for me to buy another. Contractors recently came over to do water damage abatement. They did not set up a containment wall properly as we discussed, and unfortunately cut my drywall without covering my return vents as originally promised. It turns out there was an inner layer of drywall that contained asbestos joint compound. When I had an environmental air quality specialist come over the next week, the guy had a good long stare at my Coway 250 and deduced that since I had one of these on the main level and a 150 upstairs in the smaller rooms running full time, he was confident that there would be no detectable airborne asbestos fibers in my living space (note: that doesn't mean that there wasn't any settled on my surfaces though). They did a PCM test anyway, and it was well below detectable thresholds (PCM doesn't actually test the type of particles in the air, but rather concentration of small particles). They told me my air was clear and I didn't necessarily need to wear a respirator just to come in and out of my house. Different story if I was to start kicking up dust and doing work since the contractors messed up, but the point is, the coway has scrubbed my air well.

Got it 3 month ago. Very low noise and very efficient. Dust censor works well.