Okaysou AirMic4S Medical Grade HEPA Air Purifier


The Okaysou AirrMic4S Medical Grade Air Purifier is designed for small to large rooms, bedrooms, offices, nurseries, and kitchens. It uses a medical grade filtration system to capture and reduce up to 99.97% of airborne particles as small as .3 microns (including dust, pollen, pet dander, pet hair, smoke, household odors and harmful gases).



  • AirMic4S circulates air up to 2x per hour in a room size of 580 sq.ft / 3x per hour in 300 sq.ft / 5x per hour in 150 sq.ft.
  • Fan Speeds – Allows you to adjust the air intake and output based on your surrounding air to meet the optimum purification performance.
  • 2/4/8 Hour Timer – Customizes and schedule hours of operation to satisfy your unique purification needs and save energy. Choose to let it run for 2, 4 or 8 hours with auto shut off or just let it run continuously.
  • Sleep Mode – Ultra-quiet operation at just 24 decibels, AirMic4S offers gentle white noise and turns off all lights to provide you sweet dream.
  • Smart Change Filter Indicator – The filter indicator alerts you to needed filter changes.
  • Superior Safety – CARB certified, EXECUTIVE ORDER G-20-038 – Compliance with California’s strictest safety standards, CE, RoHS certified, and ETL Listed.


It comes with an Ultra-Duo Medical Grade H13 filter but you can choose from 3 other replacement filters including an odor remover filter, a toxin absorber filter or a germ defense filter.

The Ultra-Duo medical grade H13 filter is finely folded 130 times and up to 8000 cm² when unfolded.

Also, the Ultra-Duo filter can be cleaned every 2-4 weeks to maintain its effect and itt is recommended to replace the filter every 6-8 months depending on your surrounding air.


I really like the Night Light Mode. You can choose from two blue light settings to create a better sleep atmosphere and it doesn’t influence the fan speeds. However, if you are sensitive to light, you can turn these off.  We personally liked having the light on because Rich gets up a few times a night to go to the bathroom and it is a good nightlight for him.

Set up was super simple.  I just had to remove the plastic from the HEPA filter inside the unit and plug it in.  The settings are pretty self explanatory but it comes with an instruction booklet if you need help.

Rich has really bad allergies and normally wakes up every morning sneezing and blowing his nose.  We noticed a big difference after using this unit for a couple weeks.

I definitely recommend this unit and plan to try one of the other filters when it’s time to replace the one that came with it.

You can buy it on Amazon here.

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