Best Medical-Grade Air Purifier 2020: Okaysou AirMax8L

If you’re looking for a new air purifier this year, you’re in for a treat today.

Okaysou rolls out the big guns with the AirMax8L. Unlike many powerful air purifiers, you won’t get blasted with noise to achieve first-class results. You’ll also be ready to hit back at all airborne pollutants from unpleasant smells in the kitchen to the debris and dander kicked up by pets in the home.

Okaysou Air Purifier 8L

Before we outline where this medical-grade HEPA air purifier stands and falls, a glimpse at the leading features:

Core Features

  • CADR Rating: 210
  • Dimensions: 12.9 x 7.1 x 19.4 inches
  • Room Size: 500 square feet
  • Filtration: 5-stage with true HEPA
  • Certification: CARB, CE, ETL, FCC

If that looks like the kind of multipurpose purifier you’d like to use so you and your family can breathe more easily, read on…

Generous Air-Cleaning Capacity

The first thing that struck us with this impressive purifier is the outstanding capacity. Assuming adequate air flow, you can circulate clean air 1.5 times an hour in an 800 square foot room.

Consider this a maximum, though. For optimum results, use this purifier in rooms up to 500 square feet. In spaces this size, you can push new air through the room 3 times an hour.

How about some even better news?

Well, since this unit is pretty compact, you could also slip it into smaller rooms with ease. For fully optimized results, use in a 320 square foot room where you can circulate air 5 times an hour.

Given those slimline dimensions, you could easily take this purifier around the house purifying rooms as and when required. While you can buy larger units, you won’t get this kind of versatility.

Although this purifier has a small footprint, it packs a heavy punch. This is achieved through the Advanced Turbine Motor married to highly efficient, medical-grade filtration. This motor has no less than 45 tunnels to filter air through.

So more on how purification is achieved next…

Multipurpose Purification

The key strength of this Okaysou air purifier is the way you can attack a wide array of airborne pollutants spoiling the quality of your air at home.

We’ll walk you through how this occurs in plain English.

As air enters the unit, here’s the 5 stages of filtration it encounters:

  • Pre-filter
  • HEPA filter
  • Antibacterial filter
  • Honeycomb activated carbon filter
  • Cold catalyst filter

What do these various filtration media do, then?


When the air hits the pre-filter, all the larger dirt and debris is captured. This gets things off to a very strong start.

Pre-filtration also protects the next filter and the jewel in the crown…

HEPA filter

HEPA (high-efficiency particulate air) filtration is the gold standard of filtration. This is commonly found in upscale vacuum cleaners.

What does HEPA filtration mean in real terms, though?

Well, these filters need to be tested in lab conditions to eliminate 99.97% of particles down to a size of 0.3 microns.

Many manufacturers falsely claim their filters to be “HEPA-like” in an attempt to cash in on the name. Avoid these. Okaysou are transparent with details of their genuine HEPA medium. This is rated H13, medical-grade and the second most powerful HEPA filter available.

Where the usual benchmark with HEPA filters is 0.3 microns, this H13 filter can eliminate particles down to 0.25 microns, microscopic and too small to see but still lethal to breathe in.

Bottom line, if you have anyone in your household with allergies or asthma, the HEPA filter will allow them to breathe easier with fewer allergic reactions.

Antibacterial filter

By this stage, most of the pathogens have been taken care of.

The antibacterial filter neutralizes any bacteria that are stuck to the surface. Without this medium in place, bacteria could potentially grow inside your air purifier ruining the intended effect and introducing danger.

Honeycomb activated carbon filter

Carbon binds easily to molecules. As such, this activated carbon filter traps any particles that remain.

From VOCs (volatile organic compounds) and smoke through to the smells kicked out by cooking, you’ll then have just one remaining layer of filtration for your air to pass through…

Cold catalyst filter

The final cold catalyst filter blocks any pollutants like ammonia or formaldehyde that you obviously don’t want to be breathing in.

  • Buy replacement Ultra-Filter here.
  • Buy replacement Duo-Filter here.

Quiet in Operation

SilenceBoost Technology delivers as promised. This purifier is rated at just 28 decibels at its lowest setting.

If you’re looking to use this unit in the bedroom, you shouldn’t find the sound disturbing. We would suggest you place it out of the way of the bed, though. The lights can be otherwise distracting.

You can dial the noise back with Sleep Mode so why not pop the purifier in your kids’ bedroom so they can breathe the freshest possible air?

So, aside from that class-leading filtration attacking all pathogens impairing your indoor air, what else can this purifier do?

Other Notable Features

  • Multiple fan speeds: Choose from 3 fan speeds depending on the level of purification required
  • Filter replacement indicator: Takes the guesswork out of when you need to swap out those filters
  • Child lock: Press the child lock button for 3 seconds to keep inquisitive fingers from tampering with the purifier settings
  • Timer: Schedule purification for when it’s most suitable with options for 1, 2, 4, or 8 hour sessions
  • Lengthy warranty: Benefit from a 5-year limited guarantee for complete peace of mind at the point of purchase

Alternative, Smaller Model Available

If you fancy treating yourself to a smaller version of this purifier, why not check out the Okaysou AirMic4S?

Okaysou AirMic4S


Before we round out, here’s a snapshot of the primary benefits and drawbacks of the Okaysou AirMax8L:


  • Multipurpose unit dealing with a full range of airborne pollutants
  • Capable of dealing with unpleasant household smells from pets or smokers in the house
  • Five-step filtration including true HEPA medium removes even the tiniest pathogens from your indoor air
  • Circulates the air in an 800 square foot space up to 1.5 times hourly giving you the freshest air to breathe
  • Compact form factor despite such power so easy to move around the house when you want to purify other rooms


  • You’ll need to replace the filters every 3 months so factor this into your budgeting

A Final Word

Well, you should now have a clear idea about whether the Okaysou AirMax8L or the smaller Okaysou AirMic4S would make the best fit in your home.

If you’ve never used an air purifier before, it’s easy to make the mistake of thinking purification is unnecessary. Once you have used one, you’ll never look back. You see, even if your home looks sparkling clean, the most damaging airborne pollutants are too small to see with the naked eye. If you have pets shedding hair and dander or smokers in the house, the need for purification is even greater. The same applies if you do a lot of intensive cooking kicking out often overwhelming odors.

You can say goodbye to all these worries and breathe in the air you deserve, though.

All that remains is to choose which model meshes with your needs:

Leave a Comment