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Oransi EJ120 Air Purifier Review

Derek Hales

Written By: Derek Hales

Updated on:

Today, we’re going to review our first Oransi air purifier, the Oransi EJ120. Oransi specializes in air purifiers for residential and commercial use. 

The Oransi EJ120 air purifier is the updated, more compact version of the Oransi ERIK 650a. The sleek, minimal design of the Oransi EJ120 air purifier makes it an attractive addition to your living space.

The Ultimate HEPA Air Purifier


Oransi EJ120

The Oransi EJ120 utterly crushed our air purification tests. Within 1 hour it was able to reduce PM2.5 to 0.1, PM10 to 0.0, and reduce AQI to 0. The build quality is impressive, with quality metal / plastic parts, a German EC motor, and a thick filter stack. Its purifies the largest space we’ve tested to date, handling up to 1,250 square feet. It’s pricey, but also one of the best purifiers on the market (if not the best).Check Price


  • Huge coverage area, up to 1,250 square feet
  • Extraordinary air purification, reduced PM2.5 to 0.1 and PM10 to 0.0 (best we’ve seen to date)
  • Medical Grade HEPA filter (MERV 17)
  • Just three buttons for simple usability


  • Very expensive
  • On the heavier side at 24 pounds
  • Cannot be controlled via smart phone

Oransi EJ120 Design

The Oransi EJ120 has a simple design that prominently display the air vents for maximum room coverage. Air exhaust vents are on the top and side of the unit.

Oransi EJ120 HEPA air purifier

Though compact, it still offers impressive ability to move air throughout the room. It has an airflow rating of 331 to 360 CADR (clean air delivery rate), which equates to around 1,250 sq. ft. of purified area.

Compared to the Oransi ERIK 650a (ultra high-end / pricey commercial grade), the EJ120 weighs less than half of the weight, but still covers an impressive amount of space (1,560 square feet vs 1,250 square feet). The 63 pound ERIK 650a comes on wheels for ease of moving around, whereas the 24 pound EJ120 does not.

Oransi EJ120 filters

You don’t get a choice of colors with the Oransi air purifiers. The front cover is white with the remaining sides black on both versions. 

The front of the Oransi EJ120 is removable and houses both the carbon and HEPA filter. The 1” carbon filter focuses on gases and odors while the 3” HEPA filter removes other allergens. All other technology is housed behind the HEPA filter.

RELATED – See our full list of air purifier reviews.

The Controls

The simplicity of the design continues to the controls. There is a power button located on the bottom of the back panel to power the unit on and off.

Oransi EJ120 control buttons display

Having just three buttons and a screen, there isn’t much of a learning curve with this air purifier. 

  • Filter button: used to reset the filter light indicator
  • Down button: lower the fan speed
  • Up button: increase the fan speed

The filter light indicator will illuminate automatically after 12 months to remind you to change the air filter.  The screen displays the fan speed number from zero to four.

Oransi EJ120 HEPA & Carbon filters

One thing to note on this unit is that there is no illumination with the power button or screen. Great when keeping the air purifier in the bedroom at night, but not the best when trying to use the buttons to make fan speed changes in the dark.

The Filters

The Oransi EJ120 air purifier comes with two separate filters, the carbon filter and the HEPA filter. Replacements are sold separately, with the carbon filter needing replacement every 12 months and the HEPA filter every 12 months.

Oransi EJ120 air purifier filters

You can find replacement Oransi filters here.

The two filters used by the Oransi EJ120 includes:

  • Carbon filter: includes Oransi proprietary gas filter media and the recently upgraded pleated carbon filter, which is 50% more carbon (compared to the original carbon filter) for maximum efficiency removing gas and odors
  • HEPA filter: removes allergens and particulates up to 0.3 microns small

RELATED – What is a HEPA filter & how do they work?

Size & Dimensions

The Oransi EJ120 was made to be smaller to function better in your living space. Its flat, rectangular shape means it fits nicely next to your couch or up against the wall.

Oransi EJ120 air purifier size and dimensions

It has got some weight to it, weighing 24 pounds. The EJ120 isn’t the lightest air purifier out there, but it’s not tremendously different compared to other high end air purifiers like Dyson or Molekule.

Here are the specs for the Oransi EJ120:

  • Width: 17” diameter
  • Height: 19” tall
  • Depth: 10” deep
  • Weight: 24 lbs.

Accessories & Parts

As air purifiers go, the Oransi EJ120 comes with minimal accessories and parts. When you unbox the unit, you’ll also receive:

  • Power cord
  • Filters
  • User manual


There are two separate filters included in the Oransi EJ120:

  • HEPA filter
  • Carbon filter

To replace each, you’ll have to buy them separately. The HEPA filter should last 12 months and the air purifier has a built-in light indicator next to the screen to remind you to change it.

Oransi filters close up
Close up shot of the filters. Carbon (left) and HEPA (right)

The carbon filter should last 12 months. There is no indicator light to remind you to change the carbon filter, but if you just replace it at the same time as the HEPA filter you’ll be good.

Oransi Features

What the Oransi EJ120 air purifier lacks in usability features, it makes up for in raw purification technology.

Oransi EJ120 air purifier

Oransi offers a simplistic, visually appealing air purifier loaded with some of the most advanced filters and impressive fan motors we’ve seen to date.

Medical Grade HEPA filter

The HEPA filter included, as well as replacement filters, all boast MERV17 ratings. These same filters are used in places like:

  • Hospitals operating rooms
  • Containment units
  • Laboratories
  • Nuclear industry
  • Pharmaceutical industry

Oransi maximizes the filter media to make it last longer and reduce drag on the fan. This means the fan doesn’t have to run as hard to filter out particulates, providing a quieter experience in your home.

Electrically Commutated (EC) Motor

Most air purifiers use an AC motor. Oransi on the other hand uses a electrically commutated motor. According to Oransi, AC motors aren’t as good as EC motors because:

  • Not as reliable
  • Can be louder
  • Use more energy

Usually air purifiers are made with an AC motor because it’s less expensive to manufacture.

Oransi EJ120 electrically commutated motor

Oransi uses German EC motors that promise a quieter (see our noise tests below), more energy-efficient experience, without sacrificing air flow. The Electrically Commutated motor converts AC current to DC to run the motor and uses up to 90% less power than an AC motor.

MANUFACTURER’S NOTE – the EC motor has a soft start and stop, which means it takes a few seconds for the motor to power on and off. This isn’t a design flaw, but rather a way for the motor to draw less power and save you money.

Made in the USA

Apart from the EC motor, the rest of the Oransi EJ120 air purifier is made in the USA. 

Oransi EJ120 Made in the USA

That includes:

  • Housing
  • Filters
  • Circuit board

Physical filters are used rather than an ionizer. As a result, there is no ozone produced.

Suitable for Large Rooms

The EJ120 is ideal for large living spaces, bedrooms, and offices. 

The air purifier can replace the air in a 1,250 square foot room once every 30 minutes. That is equivalent to a large room ~30’x40’.

This type of purification power, combined with the 3” HEPA filter and 1” carbon filter, makes the Oransi EJ120 great for allergies, asthma, smokers, pets, and more.


All air purifiers we test on Modern Castle go through our standard performance testing. For these tests we complete the following process:

  • Take a baseline measurement of a medium-sized room’s air quality using an electronic particulate measuring device
  • Allow the purifier to run for 1 hour on the highest setting with the door closed and air conditioner off (so no additional particulates can enter)
  • Take a new measurement of the room’s air quality
  • Record and analyze data

Air quality is measured in several ways, but the most common (and what we use) is particulate matter and air quality index.

What is PM and AQI?

PM stands for “Particulate Matter”. This measurement can basically be divided into two camps , PM10 and PM2.5.

  • PM 10 = particulate matter that is 10 micrometers and smaller
  • PM 2.5 = particulate matter that is 2.5 micrometers and smaller
  • AQI = air quality index, you’ll often see this reported on your local news station
air quality index - PM 2.5 particulate matter index

What Were the Results?

Given the price point, our expectations for the Oransi EJ120 were high, and the Oransi did not disappoint.

Starting Baseline

  • PM 2.5:  3.1
  • PM 10:  5.6
  • Particles:  199
  • AQI: 13

After 1 Hour

  • PM 2.5: 0.1
  • PM 10: 0.0
  • Particles: 4
  • AQI: 0

Within 1 hour the Oransi EJ120 was able to reduce PM2.5 to 0.1, PM10 to 0.0, and particles as low as 4 per cubic liter of air. Air quality index reached a level of zero.

We’ve seen a few other air purifiers reach a PM2.5 and PM10 level of 0.1 (including the Rabbit Air MinusA2 and Levoit LV-H134). However, we’ve never seen PM10 reach a level of 0.

Oransi air purifier removing dog allergens
Oransi is great at removing fine particulates, like pet dander

In fact, I wasn’t even sure our measurement device could report data so low, until this test.

Based on air purification testing data alone It is easily the highest performing air purifier we’ve tested to date. Its purification performance, combined with its sizable 1,250 sq. ft. purification level and thick 3″ HEPA filter make the Oransi the best air purifier we’ve tested to date.

How Loud is the Oransi?

We tested all 5 air flow levels on the Oransi EJ120 to determine how much noise they create, respectively.

Here are the results:

  • Ambient Room Noise (unit turned off) – 39 decibels
  • Level 1 (70 cfm) – 40 decibels
  • Level 2 (100 cfm) – 43 decibels
  • Level 3 (135 cfm) – 47 decibels
  • Level 4 (200 cfm) – 52 decibels
  • Level 5 (330 cfm) – 59 decibels

While level 5 gets pretty loud, we found levels 1-3 to be extremely quiet. Especially considering the level of air flow generated at each level.

Level 4 was a notable jump up from level 3, however, it was still no louder than any fan you might put in your room for cooling or white noise.

Setup & Usability

The Oransi is extremely easy to use. It comes with a manual, but you probably won’t need it for setup. 

  • Take it out of the box
  • Remove plastic from the carbon filter
  • Plug it in
  • Turn it on (air flow levels 0-5)

That’s it. Now just stick it in a high traffic area of your home and let it do its job.

How to Use the Oransi Air Purifier

Once you get used to the different air flow speeds, the Oransi air purifier is easy to use on a daily basis.

Oransi EJ120 power and specs

To get the Oransi air purifier set up…

  1. Place the air purifier in the room you spend the most time in. For most of us, that’s the bedroom or the living room.
  2. Set the fan speed based on the noise level you prefer or based on the purification level you need. Higher fan speeds will create more noise, but they will also cycle more air and remove more allergens from the air. If you have a larger space you should set a higher fan speed
  3. Avoid placing near curtains, which can block air flow. The air intake is on the front and exits on either side and at the top.

Oransi Air Purifier Maintenance

Maintenance for the Oransi EJ120 air purifier is mainly just replacing the air filters when needed.

  • Replace the carbon filter every 12 months
  • Replace the HEPA filter every 12 months or when the indicator light is lit up

You can also purchase a pre-filter that sits in front of the carbon filter. This filter is reusable and can be cleaned with a light vacuuming as needed.

You can find Oransi replacement filters for purchase here.

Is the Oransi Air Purifier a good value?

Given its small footprint, the EJ120 takes up minimal space with a large price tag. Is it still a good value?

Should you buy Oransi EJ120 air purifier?
Should you buy Oransi EJ120 air purifier?

Let’s recap what you get for the price of the Oransi EJ120 air purifier:

  1. Exceptional Air Purification Performance: The Oransi reduced PM2.5 and PM10 to 0.1 and 0.0, respectively. Particles per cubic liter were reduced to 4. Simply put, this is the best performance we’ve seen to date.
  2. Large Square Foot Coverage:  The Oransi EJ120 covers an incredible 1,250 sq. ft. This is by far the most coverage we’ve seen in an air purifier we’ve tested to date. While it might not cover your entire home it should easily purify the spaces you spend the most time in.
  3. Quiet, but Efficient: Extremely quiet, especially levels 1-3, with level 4 being about as loud as a normal house fan on high. You control the settings and noise level, and you can easily change the air flow with the push of a button.
  4. High-quality parts: The German-made EC motor is better than the standard AC motor you get in most air purifiers (according to Oransi). And the rest of the unit is made in the USA. It looks and feels incredibly well put together.
  5. Extended warranty: Oransi believes in their product and they show it by offering a 10-year warranty. This is the longest warranty we’ve seen among air purifiers we’ve tested and researched.

Yes, it’s expensive. However, it’s also the highest quality, highest performing, and largest coverage air purifier we’ve tested. As with most things, you get what you pay for.

Ultra high-end performance is always going to be more expensive. Nevertheless, we still think the value as exceptionally good.

Oransi Specifications

Width (inches)17"
Weight27 pounds
Filters2 filters (1 HEPA and 1 Carbon)
Wifi CompatibleNo
Room Coverage~1,250 sq. ft.
Filter Costs$175 / year
ReturnsVaries by retailer
Warranty10-Year limited
PriceCheck Price

Who Should Buy the Oransi EJ120 Air Purifier?

Even with a high price tag, the simple design and ease of use make this air purifier a great addition to your home. 

The Oransi Air Purifier may be best if you:

  • Want absurdly good purification performance: The Oransi air purifier utterly dominated our air purification tests. It reduced PM2.5 to 0.1 and and PM10 to 0.0. Particulates per cubic liter of air was reduced to a mere 4. It is easily the best performing air purifier we’ve tested to date.
  • Want an air purifier suitable for large rooms: The Oransi EJ120 can purify spaces up to 1,250 sq. ft. For most homes, this means multiple large rooms or large open concept spaces. The EJ120 purifies the most square footage of any air purifier we’ve tested so far.
  • Want a clean look and easy usage: The simple design and white and black colors mean this air purifier can fit in with most any decor. Flip the power switch and you’re ready to go. Just two buttons make this unit work, so almost anyone can use it with minimal instruction.
  • Expect a quality product that’s quiet:. This unit is incredibly quiet, generating 40 dB on the lowest settings and 59 dB on the highest (ambient room noise was 39 dB for these tests). The EC motor definitely seems to help make a difference, along with other notably build quality improvements over more typical air purifiers on the market.

For more information on the Oransi EJ120 or to buy click here.

Upgrade Log

  • August 20, 2019 – We corrected errors regarding the carbon filter, which had been recently updated to a more advanced version. Also corrected an error regarding the weight of the unit and fan speeds.
  • August 19, 2019 – Initial version of the page published.
The Best. Period.
  • Design - 100%
  • Performance - 100%
  • Quality - 100%
  • Usability - 95%
  • Value - 100%


Simply put, the Oransi EJ120 is the best air purifier we’ve tested to date. It has a huge coverage area of 1,250 square feet. It performed extremely well in our purification tests, reducing PM2.5 to 0.1 and PM10 to 0.0 (first time we’ve seen a 0.0). It’s easy to use. Just plug it in, choose air flow 0-5, and let it go. While it is the best, it’s also the most expensive. So the price can be a hard pill to swallow, but with performance like this we still call it a great value and a great buy.

About Derek Hales

Derek HalesDerek Hales is the Founder and Editor-in-Chief of He has been featured in Fast Company, Reader's Digest, Business Insider,, She Knows, and other major publications. Derek has a Bachelor's Degree in Business Administration from Kansas State University. Hales has been testing and reviewing products for the home since 2014.

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4 Comments on “Oransi EJ120 Air Purifier Review”

  1. Choices for Best Economical Air Purifier for a “SMOKER” 😔 in a 600sqft Building? Hopefully in a $200 range. Would you please send the links to your information or videos you suggest?

    * I just saw the link to your Modern Castle video while searching on Amazon for Levoit Purifiers.

    * I am always searching for information before purchasing a product. Although, I do wish your videos/links would pop up on google as I search.

    • Encouragement for the Day😇⬇️

    1. Your Voice is very pleasing to the Ear, and your speech is Extremely Clear.

    2. You got to the point, your delivery was Short and Sweet, and the information was Straightforward, easy to Understand, and follow!

    ~ Thank You for the Passion & hard work you have poured into your business…I appreciate it!!!
    The average person does not understand how many hours it takes to gather Informative information.
    Well Done!!!
    Have a Blessed Day!!!

    I did not start smoking until after I was affected by two hurricanes and the ice storm in Louisiana this past year….
    No house, practically living on the back porch because you go CRAZY in a Camper.
    I also have a Business that is failing because I don’t have the time I used to. (Fighting State Farm Daily)
    I need this Air purifier to protect My business/Retail Products & Supplies located in a 16×40 building On My property.
    Thank you in advance for any help!!!

    • This is the best choice by far at that price point –

      Get one of these, leave it on medium to medium high all the time and regularly check / replace the filter. It’ll make a noted difference.

      Also, thanks very much for your kind words!