
Coway - Airmega 250
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Reddit Reviews:
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Based on 1 year's data from Feb 24, 2026 How it works
Liked most:
19
0
"They've run 24/7 for years without an issue."
"I've had a Coway airmega going 24/7 for six years that hasn't developed any noise problems"
"we’ve had a Coway Airmega running continuously 24/7 for the last 6 years"
9
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"Last year there were wildfires nearby and the airmega kicked itself into high gear (I keep it on auto), so I do really trust that it’s actually doing something."
"The sensors are amazing. ... Yes whenever I cook or smoke they instantly kick on and work really well."
"great to put it on eco mode , as it detects poor air quality it automatically switches modes to higher setting and shows it as purple or red and once air is back to being good it goes back to eco mode and shows blue."
30
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"We’ve also had terrible Smokey days from the Canadian wildfires in my area and when I last replaced my filter, it was almost black so it was working hard!"
"this thing has been amazing!!! ... I have two kids with seasonal allergies and this thing has been amazing!!!"
"If I seal up my place and let this run, I don't feel any effects from the smoke at all really."
14
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"Silent"
"I have 2 Coway airmegas that are super quiet that I’ve had for nearly 2 years."
"I have 2 Coway airmegas that are super quiet that I’ve had for nearly 2 years. ... its noise was very inconsistent and it was poorly constructed compared to the Coway Airmega"
17
0
"The sensors are amazing. ... Yes whenever I cook or smoke they instantly kick on and work really well."
"I got a Coway AirMega because my apartment used to smell like my stinky chihuahua no matter what I did, and the smell is gone. ... Like when I come back to my apartment and open the door, instead of being like "wow, that is what I've been noseblind to?!" it smells the same as the hallway."
"It definitely cleans cooking odors/smoke no matter what room of my house it’s in, but I like to clear the kitchen air quickly for my own sake."
Disliked most:
2
5
"the filter costs have you replacing filters every 3 or 4 months with full use."
"DO not buy their filters directly from them - way overpriced"
"Filters are $$$."
2
1
"I also have a larger one at home (250?) that is EXTREMELY loud, so I wouldn’t recommend a big one."
0
1
"tried the Conway and there was so much plastic offgassing. I returned it.."
4
1
"tried the Conway and there was so much plastic offgassing. I returned it.."
You have an old car that's awesome! I also have an old car. What kind of car do you have? I drive a 94 Mustang Cobra. I have a coway Air Mega 250, and I have been happy with it.
I have a coway airmega 250. I have been happy with it.
The Coway Airmega 250 and 250S are on sale for under $250.
The Coway Airmega 250 and 250S are on sale for under $250.
Yes, because I live in an old building. I have a Coway 1522hh in the living room, and an Coway Airmega 250 in the bedroom
Highly recommend coway airmega 250 which is out of stock on their website but in stock on Amazon. I bought used like new for a little under 300 US which as of this comment used like new is still in stock. My partner has severe asthma to dust and cats, he was waking up nightly having full asthma attacks. Since we've gotten it a week ago (we run it most of the time) he hasn't had a bad asthma attack. The used like new was brand new for me, it just came in the wrong product box (no original packaging). It was recommended to me here by /u/UncleGurm who is the air pro-ifier.
I’m immunocompromised and always have an air purifier (Coway AirMega 150) running next to my lectern. It’s nearly silent on the lowest setting. I also have a larger one at home (250?) that is EXTREMELY loud, so I wouldn’t recommend a big one. The building I teach in is pretty modern, so I have to assume that the ventilation is quite good even though my classroom doesn’t have any exterior windows. I’ve been told many times I’m quiet/soft spoken (despite feeling like I’m always yelling), so masking while teaching is out of the question for me. I also tell my students on the first day of class that I am immunocompromised and therefore that if I do get sick, I am likely to get very sick and be gone for several weeks (sometimes I include the fact that my body literally cannot make antibodies, which is super fun). This info seems to stick with them, as I’ve had many students email me to let me know they’re sick and staying home because they remembered what I said. I am also pleasantly surprised that most students wear a mask for a few days when they return. I never mention masks at all and have never asked for anyone to wear them, fwiw. I also have a couple bottles of hand sanitizer in the room and use it very, very frequently (literally any time I touch a shared surface). I follow the same precautions in my office. I’ve had COVID three times, and two of the three times it was during the summer (I don’t teach summers). The third time I’m 99% sure I got it at a concert. Your mileage may vary, but I feel like my strategies work fine for me and at the very least give me peace of mind.
I’ve been loving my Coway Airmega 250S for over a year now—super quiet, catches dust and pet hair like a champ, and the air just feels fresher, especially in the bedroom. Filters last forever too if you vacuum the pre-filter regularly. Totally worth it if you’re okay with the upfront cost!
You seem to understand what you need. You took into account your high ceilings which is good. Most CADR is measured with the average 8 foot ceiling so your numbers are higher which you already posted. Keep in mind CADR is measured at maximum fan speed, so you’ll want a purifier that can deliver CADR over your actual square footage so that way you can run the units at medium speed. Some people run them at max, but most do medium since it’s a tolerable noise level. Since you’ve been on this sub, I assume you know that purifiers are only good to clean the air in the room they’re placed in. They don’t clean air in other rooms because of the way air moves around homes, which isn’t much. I’m no expert and I’m kinda new to purifiers too and there’s much more knowledgeable people on this sub. I can’t speak to other brands, but I like my Coway Airmega 250 that I got. It says it covers up to 930 sq. Ft. And 2 air changes per hour in that amount of space at max speed. I find that the unit may be a little small for the area I’m cleaning which is the living room and kitchen. I keep it positioned between the 2 and it takes longer to clean the air in each room positioned like that vs. being placed in the actual room, but it gets the job done I feel like and I’m happy with it. Not sure how much help that was, but I would look at the Coway Airmega series. Pricy, but good units. I haven’t tried any others but I know air doctor is good but very expensive. Good luck
Air purifiers can’t go into other rooms generally speaking, so you will need multiple purifiers. Whatever room they’re in you can expect the air to be exchanged regularly, but even with a good one in the hallway it would barley exchange the air in the rooms because of the way air circulation works. Having fans going in rooms and pushing air into the hallway to get purified is one solution, but the best solution will be multiple air purifiers. If I were you, I’d get a purifier for the computer room and bedroom. I have a pretty small house and I have a Coway Airmega 250 and I love it. I keep it between my living room and kitchen and it does a good job of purifying the air in those rooms. Sometimes I take it to my bedroom at night. It’s kinda heavy but it’s easy enough to move
I have a AirMega 250 and another cheaper unit in my "cat room" (opposite side of house). I prefer the AirMega in bedroom not as light polluting. I change the filter once a year and its around $80 for the unit.
why not go for airmega 250 coway instead of 150? It has bigger coverage and it would better cover your bedroom space. If considering Xiaomi, go for simple 4 (not the pro) since pro has ionizer which generates ozone ( not good) philips- not sure how is the filter availability situation presently but I have heard in the past replacement filters were not available easily Qobo- no idea Dyson- not needed, coway or Xiaomi can clean the air as good as Dyson
If i were re-buying for a large space, id consoder trying to get my hands on the airmega 240 but it seems to be out of stock https://cowaymega.com/products/airmega-240 Or the airmega250 https://cowaymega.com/products/airmega-250?srsltid=AfmBOopMFwg2kp4uHXLg6CFV-JDBNwspkjiAVJNPEuy2c7nXEakKbirz which is also often sold out apparently. we have an airmega 150 in each bed room and they are awesome https://nl.coway.com/products/airmega-151?srsltid=AfmBOoo63FcMmUk2KnsIu0J6h55Q6nfrxzyrCVz05W6ltykwF44dmMC3q We have the airmega mighty in our large living dining kitchen area https://nl.coway.com/products/airmega-mighty-1?variant=39686230671432 it works well but is uglier than the 240 and 250 that are currently sold out. You can find more information on this sub https://www.reddit.com/r/AirPurifiers/ including threads that will explain what you can and cannot expect from an air filter (not do much heavy dust removal unless you buy units much much larger than the minimum, how to calculate the needed air turnover rate for your case and space, etc...)
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