COWAY Air Purifier for Large Room Whole Home Up to 3,285 ft², HEPA Filter for Smoke, Allergen, Pet Dander, Odor, PM(1, 2.5, 10), AQI, Turbo Eco Mode, Energy Star, 3yr Warranty, Airmega 450 White

The unit is very quiet when the air is reasonably clean. Some reviews indicated a long-lasting bad smell. I noticed a bit of odor when I first ran the unit. I suspect this is merely the smell that goes with new plastic. After a few hours the odor was gone.

It does an excellent job, the air feels very clean. As soon as there is any pollution, like frying or something similar, the numbers go up and it immediately purifies the air.

We had a struggle figuring out how to remove the cover to clean the filter each month - but after we got the hang of it, it’s much easier! Because we didn’t understand the instructions, we messed up the cover’s ability to connect to the unit correctly. Customer service was great to replace the cover for us - and provided more detail about how to correctly remove it. We had to send them a video showing them how we were taking it off and putting it on first - and how the unit magnets were staying in the cover (not in the unit). We’ve used this 24-7 for about six months now. It is quiet and makes us feel like our inside air is better for our health. I love that we can turn the lights completely off and have choices of what lights up, if we want that. We have a smaller model of this same brand in our bedroom that we’ve had since the pandemic. It has worked without fail.

Great

Coway is a reliable brand. Compact and quiet. Made in Korea!

I returned this product because it doesn't work with my phone. When I tried to download the app, it said it was not compatible. The product is of good quality, but its compatibility doesn't meet my expectations.

Airmega 450 is awesome. Got it to replace the 160 due to wanting more air exchanges per hour, and this thing moves a lot of air. On turbo, walking into the room, you can easily notice the quality of the air. Pretty large fan, crushes allergies, and at a 500 dollar price point I couldn’t be happier.

I ordered two units, but after testing just one and finding that the PM sensor was completely unresponsive, I didn’t even bother opening the second. It stayed stuck at "1" regardless of room, activity, or visible dust stirred directly in front of the intake. I contacted customer service, and they first said, “your home must be clean then.” When I explained that I had tested it with intentional dust exposure, they claimed the sensor needs to run for 24 hours to calibrate. That explanation wasn’t just questionable — it’s nowhere to be found in the official manual or documentation, which makes it feel like a made-up excuse. Worse, the rep became argumentative when I continued asking questions. Rather than offering to help troubleshoot or acknowledge a potential issue, they doubled down on dismissive answers. Returned it the same day. At this price point, a basic function like an air quality sensor should work out of the box. Very disappointing for a product from a premium brand.