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Okaysou AirMic4S Medical Grade Air Purifier – Review

Okaysou is a new company on the market that makes excellent air purifiers. AirMic4s is not their first model nor the last one. They have other types of air purifiers, and they like to cover as many customers as they can with their products. 

Okaysou AirMic4S Air Purifiar Review

Okaysou AirMic4S has a beautiful compact design. Since it is a small air purifier, you can easily transport it from room to room. It has a two-stage H13 Duo-Filter. The filter is a medical-grade HEPA filter that can remove 99.97% of airborne particles down to 0.3 microns. With such amazing properties, asthma, and patients that suffer from allergies can finally breathe with full lungs.

Okaysou AirMic4S Air Purifier

Okaysou AirMic4S is not only good against allergens, which trigger allergic reactions or asthma; it is also useful against smoke, bad odors, and pet pollution. You can use it in a bedroom, nursery room, or any other small room not larger than 130 square feet.

If you set it on the first speed, you can still have a good night’s sleep, and if you use it in the nursery room, the baby will not be woken up by their purifier.

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Okaysou AirMic4S Specifications

Below is a complete list of important specifications and features included on the Okaysou AirMic4s Air Purifier:

Dimensions8.7 x 8.7 x 11.8 inch
FiltersPre-filter, HEPA and Activated Carbon
Return30 days via Varies by retailer
Warranty 4 years + 1 additional year
User manualPDF


Okaysou AirMic4S has a premium outlook thanks to a smooth white color with black details. Maybe on the touch, plastic material will feel cheap, but it is durable enough to make this air purifier last for years.

On top are powerful fans that suck the air from below. At the bottom is a filter that is a bit larger than at similar products.

Touch Buttons

What makes this air purifier great is the fantastic touch buttons panel. Touch buttons are responsive, sensitive in touch, and offer many functions. However, there are no advanced options to control AirMic4S because there are no sensors that can monitor the air in real-time.

Okaysou AirMic4S Touch Buttons

Let’s check some options that you can choose and control with the touch buttons panel.

On/OFF Button

With a simple push, you can turn it on or off. As soon as you click the ON button, you will hear a beep, which is a signal that air purifier is starring. Every time you start Okaysou AirMic4S, it will start on first speed because this model doesn’t have a memory to save desired settings and will always start with default settings. Also, the ambient light and panel light will be at a maximum.

Sleep Mode and Three Fan Speed

As already mentioned on the first speed, this air purifier is quiet, and you can sleep without interference while the air purifier is working. But you can choose sleep mode if you want a good night’s sleep. By pressing sleep mode, you will lock all the settings except on/off button, and all the light will shut down. The fan speed will be set at first speed. On the other hand, if you want to remove pollution from the room at the fastest speed, then you can choose second speed or third speed, which is the fastest speed this air purifier can run.

Timer Function

The timer function is simple to use; by pressing a timer button, you can switch between how long will air purifier work. You can choose between 2, 4 or 8 hours. The air purifier will automatically shut down at the desired time. 

Dimmer Button

The dimmer button is also a useful feature. With this button, you can adjust ambient light. For example, if you want to watch a movie in the dark, you will dim the light to the desired level.

Filter Reset Indicator

When the light of this indicator appears, you know that it is time to change the filter. This light will appear in approximately 6 to 8 months. After you replace the filter, you need to press and hold the filter button for three seconds, so the timer resets.

Size and Weight

Size matters; the bigger the air purifier, the more power it has. On the other hand, small compact air purifiers like Okaysou AirMic4S are portable, and you can easily use them in more than one room. 

The weight of Okaysou AirMic4S is only 7.95 pounds. Thanks to a small size (8.7 x 8.7 x 11.8 inch), this air purifier can be placed on a night table or any other small table you have in your room.

What You Get In The Box

In the package, you will get one air purifier, one Original Ultra-Duo H13 Filter, and a user manual. Nothing else you need for clean air.

Okaysou AirMic4S Video Review

In the Okaysou AirMic4S video review, you can see in more detail all about the tests as well as hear additional information that may help you make a good purchase.


Okaysou AirMic4S has all the features you need for clean air. It has features that will help you run it the way you want.

3 Stage Filtration

The true HEPA filter is the best filtration method when will talk about air purifiers that can remove allergens from the air. This model also has Ultra Filter (pre-filter), which can remove heavier pollution. You can clean Ultra Filter every two to 4 weeks to keep it clean and working at optimal performance. It also uses a carbon filter to remove bad odor. 

Sleep Mode

I have already mentioned this feature at describing buttons, but it is worth to say it once again to make sure you understand that this air purifier can be used in the bedroom without a hassle.

3 Fan Speeds

The first speed is a quiet one, second and third are used for fast air purifications. The third speed is quite loud, and you probably won’t like it if you are doing something in the room that requires peace.


AirMic4s emits light, which can be adjusted with a button. You can use it at night if you don’t like to sleep in the complete dark.

Okaysou AirMic4S Night Light

Change Filter Indicator

With this feature, you won’t need to guess when is the time to change the filter. Once the light starts flashing, you should change the filter. In most cases, the light will turn on in 6 to 8 months.

Customized Medical Grade Filters

By default, this air purifier is delivered with a Medical Grade H13 Original Filter. However, if you have other needs, you can choose new filters. Okaysou gave you three additional filters at your disposal; Medical Grade H13 Germ Defense Customized Filter, Medical Grade H13 Toxin Absorber Customized Filter, and Medical Grade H13 Odor Remover Customized Filter.

Five Years Warranty

At the purchase, you will get four years warranty. However, if you got to the Okaysou website and register your product by following the instructions on the site, you will get an additional one-year warranty.


We have only tested Medical Grade H13 Original Filter, which we got by default in the box. I hope in the near future we will get the opportunity to put our hands on other advanced filters Okaysou offers.

Okaysou AirMic4S Replacement Filter

Medical Grade H13 Original Filter is one of the four Okaysou filters for AirMic4S, which traps dust, pollen, pet hair, and dander as well eliminates pet odor and other unwanted odors, including smoke.

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Still, the original filter has a True HEPA H13 filter, which is a medical-grade filter. It means that no bacteria will grow on the filter. The original filter uses an active carbon filter to remove bad odors. And Ultra Filter is used as pre-filter. Ultra filter is washable, and you will need to wash it every 2 to 4 weeks because its main job is to grab large pollutants like pet dander and hair. These large pollutants can clog filter easily, and because of that, it is smart to clean it periodically.

The whole filter is spherically shaped, which gives it an additional airflow. With higher airflow, the air purifier will have higher ratings on the CADR test.

Filter Replacement

Replacing the filter is easy, and everyone can do it:

  1. Turn the air purifier upside down. Open the bottom by twisting it counterclockwise, just as the arrows on the bottom represents.
  2. As soon as you remove the bottom, you can take the filter out. If you just bought the air purifier, you will need to take the filter out and remove the plastic package. There is no top or bottom side of the filter, and whichever side you put it in first is OK.
  3. Place the bottom cover back and twist it clockwise to lock the filter inside.


When Okaysou AirMic4S operates on the first speed, you can sleep without a problem because there is basically no noise pollution. However, if you run it at higher speeds, for example, at the highest speed, I am afraid you won’t get much sleep. 

We have tested all the fan speed and measured noise pollution with a special tool that measures noise level. Results can vary slightly per test because they also depend on other factors like room size and ambient.

Below you can see how much noise AirMic4S makes on each speed.

SpeedValue (dBA)
Speed 145.7 dBA
Speed 250.0 dBA
Speed 357.5 dBA


I have personally tested this model in various rooms and will like to share the results with you. Keep in mind that these were not laboratory tests; these were tests made by me in my home. 

Okaysou AirMic4S Performance Test

I have tested it in different rooms, smaller and bigger than the recommended size. As evident, the most significant performance is in smaller rooms, and in that room, the air was filtered very fast. In bigger rooms, the air is still filtered but not as fast as in smaller rooms. In every room air purifier was working for one hour.

194 Square Feet Room Test

In this room, the air quality in the room was 85% better after one hour of running AirMic4S. AQI drop from 78 to 12, which is a good result considering that this room is larger than the recommended 130 square feet room.

#Starting BaselineAfter 60min
PM 2.5588.6
PM 1081.212.1

120 Square Feet Room Test

In one-hour, air quality was improved by 83%. The reason why it didn’t improve for more is that this room has much cleaner air from the start. AQI was reduced from 35 to 6. 

#Starting BaselineAfter 60min
PM 2.524.24.4
PM 10346.2

230 Square Feet Room Test

In this large room, I did a different test. It was a one week test in a living room. There was a smoker in the room who were occasional smoking. During the day somebody was in the room, and that just adds to the pollution level.

If you decide to use this air purifier in a larger room than 130 square feet, don’t expect wonders. This air purifier works best in small rooms.

When people were smoking in the room air purifier was struggling and wasn’t able to clean the room. However, even in such a large room as soon as the smokers left the room, the air purifier was capable of cleaning it up in 2h.

Operating Cost

Operating costs are meager. This air purifier uses only 25W when running on maximum speed. In 24h on the maximum speed, you will pay 2.2$ monthly. It will use 0.6Kwh in that period, and if the power cost in your state is 0.12$, that totals to 2.2$ per month. In standby mode, it uses only 5W. 

Okaysou AirMic4S consumes tiny amounts of energy, and because of that, you should not bother with extra costs on the power bill because there won’t be any.

The highest maintenance cost is filter replacement, which needs to be done every 6 to 8 months. Operating costs are really affordable, even if the filter needs to be replaced periodically. Still, the price of a new filter is also affordable, so that won’t represent any additional problem with your budget.


To revise, here are advantages and disadvantages of AirMic4s:


  • Modern Design
  • Effective In Room Smaller Than 120 Sq. Ft.
  • 5 Year Warranty
  • Affordable maintenance
  • Low Energy Consumption
  • Cool Ambient Light
  • Medical Grade Filter
  • Silent Sleep Mode
  • Turn Off Timer


  • Not Best For Smoke
  • Not Remembering Settings at Shutdown
  • You may notice chemical odor after removing the plastic wrap from the filter


If you decide to buy such a small lovely air purifier, keep in mind that it is not meant for large rooms. Okaysou AirMic4S, on the other hand, won’t disappoint you. It will do its job, and during that process, you won’t have any maintenance costs that will make your bills unpayable.

It is a portable air purifier that can help you to fight against asthma and allergies.

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