KOIOS EPI810-A 3-in-1 Air Purifier Review In 2023

The ideal air cleaner to deal with California Wildfires Travels. KOIOS EPI810-A 3-in-1 True HEPA Air Purifier is an affordable option for those that need clean air without the budget. Comes with tons of useful features for a compact device, what are the pros and cons of owning one? Can the filter remove ultrafine particles? Is it costly to maintain? Find out in our full review below.
online price (US)**
±45.99 $/ 7

(annual filter cost ±38)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

KOIOS EPI810-A Specification

ProductKOIOS EPI810-A
6.9 x 7.5 x 6.9 in
(17.5 x 19.1 x 17.5 cm)
Weight2.1 lb (1 kg)
Coverage (up to)156 sq. ft. (14 m2)
Airflow speed
Dust free (CADR)
Pollen free (CADR)
Smoke free (CADR)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
6 months
HEPA filter
- Lifespan
- Replacement cost ($)
True HEPA filter
6 months
Carbon filter
- Lifespan
- Replacement cost ($)
Activated Carbon Filter
6 months
Ionizer/ Technologies
UV-light/ PCO
Other filter
All-in-one filter
- Lifespan
- Replacement cost ($)
KOIOS Certified Replacement Filters EPI810
6 months
+- 18.99
Optional/ Addon
Noise level<25 dB
Power usage level8 W
Timer/ Scheduler
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty3 years
Email/ Phone support

Key Features

  • 3-stage filtration with 2 fan speeds
  • 360° deep purification
  • Fine Preliminary pre-filter
  • True-HEPA filter - Filter 99.97% of particles as small as 0.3 microns
  • Activated Carbon Filter
  • Optional night light
  • Whisper-quiet operation
  • CARB certified ozone free, Etl, CC Certified & Ce Listed
  • 3 years warranty 24/7 live chat support

Design and Usability

KOIOS 3-in-1 HEPA air purifier EPI810-A can greatly improve your indoor air quality despite being price so cheap. The sleek minimalist design stands at a small 6.9 inches in diameter and a short 7.5 inches in height, it will fit nicely on your table, bedstand, desk, island table, and TV cabinet. The 2.1 lb weight is very light for room to room purifying and you can even pack it for a short getaway. Overall fitting is solid but no premium materials can be found here. It will last for everyday use with no off-gassing to worry about.

KOIOS 3-in-1 True HEPA air purifier is very easy to use with a single button operation. You can cycle between the 2 speeds, activate/ deactivate nightlights by holding the button for 4 seconds, and reset the filter change indicator. Perfect for children’s bedroom that needs a sense of security and pathway to the toilet.

No quality is compromised. KOIOS HEPA air purifier is officially CARB certified ozone-fee, ETL, FCC. CE listed, and EPA approved. 100% safe for your respiratory system with no harmful byproducts produced. Best of all, it comes with a 3-years warranty with 24/7 live chat support. Again this is a product that only costs you less than 50 dollars.

Airflow, Coverage, And CADR

A tiny air cleaning with a powerful 360° deep air purification intake. KOIOS EPI810-A 3-in-1 HEPA Air Purifier can clean indoor air of up to 55 cubic meters of air per hour or 156 square footage in normal mode. Not the greatest coverage but it is more than sufficient for small room sizes like dorm, study room, bedroom, dry washroom, and kitchen. No CADR is available but the output should be identical with the airflow range.

Recommended Read

Filters And Performance

No surprise here, KOIOS EPI810-A is powered by a 3-in-1 True HEPA filtration. The pre-filter will trap dust, hair, debris while protecting the HEPA filter from being clogged by large particles. In return, the HEPA filter removes 99.97% of fine particles small as 0.3 microns in sizes like dust mites, pet dander, pollen, mold spore, and fungi. The carbon filter neutralizes toxic smoke, fumes, and odors from pets, cigarettes, food, paint, and detergent. The filtration might be on the smaller size, it will perform well as long as it is placed close to the sources. Suitable for babies, elders, people with rhinitis allergy symptoms, and wildfire use.

Noise And Energy Usage

Breeze through the night sleeping with zero distraction. KOIOS EPI810-A 3-in-1 True HEPA Air Purifier noise reducing fan outputs a whispering sound of under 25 dB. You can work, sleep, or relax peacefully without any humming fan noise spinning in the background. Energy output is very low at an average of 8 wattages per hour or less than 0.002 units of power. You can leave it running all day quietly and efficiently without a care in the world.
Noise TypeDecibels
KOIOS EPI810-A<25 dB
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

This is no doubt KOIOS EPI810-A 3-in-1 True HEPA air purifier's biggest selling point. It cost less than 50 dollars from an official seller after discounts. Not other brands can offer a similar package with the same HEPA filtration. As for maintenance, the 30-40+ annual filter replacement cost is on the higher side given how affordable the air purifier is. You can reduce the cost and stretch out the usage time if your home air quality is still not too bad.
The best place to buy KOIOS EPI810-A 3-in-1 True HEPA Air Purifier is on Amazon as it offers a high discount, free shipping (limited by country), and free return with 24x7 customers support. The official KOIOS website is also a good place to go but the shopping experience is less than ideal. You will also need to open a new account which can be a hassle for many.


  • Affordable (less than 50) with low filter replacement cost.
  • Extremely lightweight and compact design with 360° deep purification.
  • Standalone True HEPA filter and carbon filter.
  • Optional night light and can be disabled when not needed.
  • Whisper-quiet operation with noise level less than 25 dB at low speed.
  • Comprehensive 3 years manufacturer warranty.


  • Not the quickest in removing smoke particles and odors.
  • Comes with only 2 fan speeds adjustment without a timer, auto, or sleep mode.
KOIOS EPI810-A 3-in-1 Air Purifier Review

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.

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