KOIOS EPI810 air purifier review

The KOIOS EPI810 is a convenient air purifier for people with limited working spaces, but it lacks the power and performance of more expensive air purifiers.

Image shows the KOIOS EPI810 air purifier against a white background.
(Image: © Amazon)

Top Ten Reviews Verdict

The KOIOS EP1810 is an affordable and convenient option for people who want to improve their air quality without sacrificing space, but it lacks the horsepower of more expensive models.


  • +

    Easy to set up and use

  • +

    Small enough for a desktop or shelf

  • +

    Convenient for travel

  • +

    Built-in night light


  • -

    Weak performance

  • -

    Highest setting is noisy

  • -

    Replacement filters aren’t cheap

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Our KOIOS EPI810 review takes a closer look at this compact air purifier, from how well it performs in a family home, to how other users rate their KOIOS EPI810.

Our best air purifiers buying guide looks at a range of air purifier options on the market, from purifiers with bespoke apps and Smart technology to more basic and affordable choices. So, if the KOIOS EPI810 isn’t the right air purifier for you, you can still find one to suit your home and budget.

Key Specs

Dimensions: H 7.5" x D 6.9" 

Weight: 2.5 lbs

Filter: True HEPA H13

Max noise: 52 dB

Coverage: 269 sq feet

Modes: 2

Warranty: 1 year

Energy Star Certified: No

Fitted with a True HEPA 3-stage filtration system and an activated carbon filter, the KOIOS EPI810 also comes with a 1-year warranty. A True HEPA filter should be able to absorb around 99.97% of particles, including dust, pollen, mold and bacteria.

The additional activated carbon filter absorbs volatile organic compounds (VOCs). VOCs are found in household chemicals, such as cleaning products or adhesives. An activated carbon filter can also help to erase unpleasant cooking or pet odors.

Both filters come already fitted in the KOIOS EP1810, so all you have to do is plug it in and switch it on.

KOIOS EPI810: Price

  • Price: $45.99 (not available in UK except on auction site eBay) #
  • 1-year warranty

The KOIOS EP1810 is certainly one of the most affordable air purifiers on the market today. It’s just $45.99 on KOIOS’s own site, and $49.99 on Amazon.com. That price tag places it firmly at the cheap end of the market, with the KOIOS EP1810 retailing at under half of what a standard air purifier normally costs. Users may also find cheaper options on auction sites, so it’s worth shopping around. 

The 1-year warranty needs to be activated on KOIOS’s website in order to be valid, and users will need to have their Amazon order ID ready. 

KOIOS EPI810: Setup and usability

Image shows the KOIOS EPI810 on a shelf next to a portable speaker.

(Image credit: Future)

The KOIOS EPI810 is easy to set up straight out of the box. The True HEPA filter is already fitted into the purifier, so users only need to plug in the device and switch it on to get it started. A single power button on the top powers up the purifier and allows users to toggle between the two available fan speeds. It also allows users to power off the nightlight if they prefer not to have it on. 

The KOIOS EPI810 air purifier can be operated via a mains socket or a USB cable. However, our at-home testing found that the fan speed is reduced when operating via USB, so users may prefer to keep it plugged in for optimum performance. 

There’s no doubt the KOIOS EP1810 is super easy to use for someone who just wants to plug in their air purifier and go. It’s also ideal for travel, with its compact size and low weight making it ideal for packing away in luggage. Its small size and lack of power, though, means that it’s probably best for small spaces.

Image shows the KOIOS EPI810 air purifier on a shelf.

(Image credit: Future)

KOIOS EPI810: Design

  • Height: 7.5 (in)
  • Diameter: 6.9 (in)
  • Weight: 2.5 (lbs)

The KOIOS EP1810 is sleek and stylish, with a glowing blue night light that can be switched on or off. The single power button at the top of the device is also backlit, making it easy to find and operate in a darkened room. 

The smooth white cylinder design is compact, at just 7.5 inches tall and 6.9 inches in diameter. This makes it the perfect size to sit comfortably on a desk or shelf without sacrificing too much valuable space. 

At the base of the unit, air particles are pulled in via a slatted section, which gives the purifier a lighter look and feel. The unit is made of plastic and is exceptionally light and easy to move around.

Image shows a top view of the KOIOS EPI810.

(Image credit: Future)

KOIOS EPI810: Features and performance

  • Night light feature
  • Poor performance on air quality tests
  • Noisy at its highest setting

The True HEPA H13 filter within the KOIOS EPI810 means that it should, in theory, remove at least 99.97% of airborne particles. However, our testing revealed the air purifier fell far below the 99.97% absorption expected from a H13 True HEPA filter. 

We tested the KOIOS EP1810 over three separate trials of 30 minutes each, using an air particle counter before, during, and after testing, in a sealed room measuring 323 square feet.

First, we measured ambient air quality before and after using the air purifier. We found that it absorbed just over half (52%) of particles smaller than 0.3 microns, and particles smaller than 2.5 (55%).

Next, our match smoke test evaluated how well the KOIOS EP1810 absorbed particles released by burning matches. It performed better this time, eliminating 75% of particles smaller than 0.3 microns and 82% of particles smaller than 2.5 microns.

Finally, our incense smoke test assessed whether the purifier performed well after burning five incense cones at the same time. While the KOIOS EPI810 absorbed an impressive 99% of particles measuring 10 microns, it only absorbed half (52%) of particles smaller than 2.5 microns.

While the KOIOS EPI810 features two fan speeds, both settings are noisy compared to other air purifiers. The lowest setting is 40 decibels, similar to ambient noise or bird calls, while the higher setting is 52 decibels, which is the same as a normal conversation. So if you want to switch on your air purifier and so dome work, you may find it hard to stay focused with all that distracting noise!

On the upside, a bonus night light may make the KOIOS EPI810 a good air purifier for a nursery or child’s bedroom, and even replace that white noise app you’ve been using to settle them to sleep. The night light can also be switched off by holding the power button down continuously for four seconds. 

Image shows the KOIOS EPI810 air purifier turned on,

(Image credit: Future)

KOIOS EPI810: User reviews

Despite some poor reviews, the KOIOS EPI810 scores 4.5 stars out of five on Amazon.com. Users praise its compact size and convenience, while others say it has improved their home’s air quality. The activated carbon filter is also rated for neutralizing unpleasant cooking and pet odors. Because it’s so affordable, many users say they’ve bought several devices to use in rooms throughout their home. 

However, negative reviews point out how noisy the KOIOS EP1810 is, especially at its highest setting. Others say they’ve been unable to switch the night light setting off. This information is included in the manual, but it’s easily missed. The replacement filters are also criticized. At almost half the price of the base unit, they are expensive to replace regularly.

It’s worth noting though, that on the KOIOS site, there are several users who say their allergies have improved after purchasing the KOIOS EP1810. One user says the lowest setting is quiet enough to sleep through, although it took a day or so to get used to it.

Should you buy the KOIOS EPI810

If your budget is tight, you’re low on space, or you just want to plug in and go, the KOIOS EP1810 could be a good entry-level air purifier to try out. However, if you really want to significantly improve the air quality in your home, or if you live in an area with poor air quality, you may need to spend more on an alternative air purifier.  

If this product isn't for you

If you’re looking for an affordable air purifier that performs better, the Levoit H132 is just a little bigger than the KOIOS EP1810 and performed well in our at-home testing.

If you want more functionality and features, then why not try the Levoit 400S? With a connected app that shows you real-time air quality and an ultra-quiet sleep mode, this air purifier is still affordable, but packs a lot more punch performance-wise. 

If you’re after an air purifier that can cope better with large spaces, then check out the Dyson Purifier Cool. Sleek and stylish, and compatible with voice services such as Alexa, it can cover areas of up to 800 square feet.

Joanne Lewsley
TTR Customer Advisor, Vacuums

Joanne Lewsley is a reputable freelance writer specializing in evidence-based health and lifestyle content. With a background in journalism and extensive experience working for known brands, Joanne rigorously tests and evaluates home gadgets. Her passion for writing is complemented by her love for the outdoors and live music.