- **air quality sensor**: automatically adjusts fan speed based on air quality.

- **air quality sensor**: automatically adjusts fan speed based on air quality.  Read Less

- **smart features**: app control, real-time air quality monitoring, alexa compatibility.

- **smart features**: app control, real-time air quality monitoring, alexa compatibility.  Read Less

It runs quietly at minimal fan level until/unless it detects lower than normal air quality then it works harder, and returns to...  Read More

It runs quietly at minimal fan level until/unless it detects lower than normal air quality then it works harder, and returns to low level in a few minutes.  Read Less

It is very sensitive to changes in the air and kicks on quickly when i am cooking in the kitchen something that becomes airborn...  Read More

It is very sensitive to changes in the air and kicks on quickly when i am cooking in the kitchen something that becomes airborne, ie frying something on the stove.  Read Less

Got it on sale for a lot cheaper than original price so watch for a price drop on amazon.

Got it on sale for a lot cheaper than original price so watch for a price drop on amazon.  Read Less

Expensive, but if you really need an air purifier that can handle it all.

Expensive, but if you really need an air purifier that can handle it all.  Read Less

Coway shipped out a brand new replacement (just received it today, which prompted me to write this review) and the replacement works great.

Coway shipped out a brand new replacement (just received it today, which prompted me to write this review) and the replacement works great.  Read Less

First shipment was damaged, so it was returned.

First shipment was damaged, so it was returned.  Read Less

I liked it so much that i replaced the levoit 300 in my bedroom with an airmega 100, and i like it very much too.

I liked it so much that i replaced the levoit 300 in my bedroom with an airmega 100, and i like it very much too.  Read Less

The filter media is much better made than the levoit units, having much more activated carbon, and much more surface area.

The filter media is much better made than the levoit units, having much more activated carbon, and much more surface area.  Read Less

Overall, the coway airmega 400s is a powerful and smart air purifier ideal for large living rooms, though it comes with a higher price tag.

Overall, the coway airmega 400s is a powerful and smart air purifier ideal for large living rooms, though it comes with a higher price tag.  Read Less