Koios Home Air Purifier

For large rooms, we recommend the Koios Home Air Purifier. This is also a great option for anyone looking to purify air in a medium-sized space. The purifier can cover up to 1420 square feet and removes up to 95 percent of allergens, including pet dander and dust mites.

The device has three-speed settings, a timer, an ionizer, and an ultraviolet light that kills germs. There is only one thing it does not have: a built-in air quality monitor. Our recommendation is to get the smaller version of this purifier if you want to monitor your air quality.

It is quieter than most purifiers we tested, making it a good choice for bedrooms. Furthermore, its components are easy to access, making it easy to clean and maintain. It comes with a five-year warranty.


Digital display with dimmable screen 80%
Three fan speed settings 70%
Built-in UV light to kill germs 63%
Quickest in our testing—27 minutes worth of cleaning runs in under 30 seconds 68%


Digital interface difficult to use 85%
Hard to move around because it's so lightweight yet bulky at the same time 69%
Limited scheduling options 60%

Koios Home Air Purifier FAQs

Strangely, the manual does not say anything about a required space around the the air purifier I asked the company representative and he said there was no required distance from the wall. Other air purifiers I have used always said to keep them 6 inches from the wall, so I would suggest you do that.
First, they tell you that the filters will last for 3 to 6 months. Secondly, there is an indicator. One of the lights is for a timer that can be set for four different hour settings. If all four light up, that means the filter needs replacing.
Yes, the box it came in says “Made In China”.

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