EJ120 Air Purifier

Cleans 1,250 sq ft (2 times per hour)
+ Free Shipping


Super Quiet - no air purifier on the market produces so little noise with such a high air flow making Oransi the The Ultimate Air Cleaning Machine. MERV17 True HEPA filter tested up to 99.99%. Advanced carbon for smoke removal. 

  • Bedroom, Office
  • Living Room
  • Basement
  • Large Living Areas
  • Classroom
Effective For:
  • Dust,
  • Allergies,
  • Pet Dander,
  • Mold,
  • Smoke,
  • Viruses,
  • Bacteria
  • SOLD OUT - For comparable performance (and lower price) we suggest the mod air purifier.
  • Meet EJ, the Tesla of air purifiers - with a super efficient & quiet German designed motor and top notch performance. Energy Star.
  • Chosen by Javits Center in New York during Coronavirus 2020 to clean the air in the field hospital. CNN Best Air Purifier for Large Homes 2019. See our guide for use in a classroom or dentist office.
  • Removes Allergies, Asthma, Dust, Bacteria, Pollen, Mold Spores, Pet Dander, Smoke, Viruses.
  • Medical Grade True HEPA filter (MERV17) tested to remove 99.99% of airborne particulates at 0.3 microns, 99.8% at 0.10 microns and 99.8% at 0.02 microns (20 nanometers). Virus particles range in size from 0.02 to 0.4 microns and our understanding is COVID is around 0.12 microns where the removal rate with each air pass is 99.85%.
  • What's included: Air purifier with filters installed, User's Manual
  • Find the EJ Replacement Filters.
  • View Technical Specs >

Active discounts cannot be applied to the EJ

Free Shipping On All Products
Free Shipping On All Products
60-Day Returns*
60-Day Returns*
10 Year Warranty On All Products
10 Year Warranty On All Products
Paypal No Interest Financing Available
Paypal No Interest Financing Available

We want to personalize your experience (check all questions that apply):

Where to Use

Best for: Best for: Bedroom, Office, Living Room, Basement, Large Living Areas

Coverage Area
Coverage Area

Up to 1,250 sq ft

Effective For
Effective For

Dust, Pollen, Mold, Smoke, Bacteria

Ej air purifier

No air by-pass so all the air is filtered. This is a huge feature and is one reason we have superior air filtration performance.


Electronic display alerts you when it is time to check the air filters.

Reliability and Quality
Reliability and Quality

Air purifier housing, filters, software, motor/fan assembly & software, fan electronics, among others made in USA.

Easy To use
Easy to use

Simple controls with electronic 5 speed button to dial in the exact air flow.


Latest high efficiency EC motor is quieter and uses up to 90% less energy

Technical Specs
Room Coverage :
Most sized rooms up to 1,250 sq feet
Max Air Flow (cfm) :
AHAM Verifide CADR (Max Air Flow cfm): pollen-360, dust-333, smoke-331
Air Flow by fan Speed (cfm):
1: 70 2: 100 3: 135 4: 200 5: 330
52W, 120V/60
Main Filter Life :
12 months
Main Filter Rating:
MERV 17 (>99.97%+ at 0.3+ microns). 36 sq ft filter material
Nano Particle Removal:
99.8% at 0.1 microns, 99.8% at 0.02 microns (20 nanometers)
Carbon Filter life:
8-12 months
Noise Level Lp(A) by Fan Speed (1-5):
1. N/A, 2. 19, 3. 24, 4. 33, 5. 59 dB(A)
17" x 19" x 10" (W x H x D)
Where Made:
Pre-filter Weight:
1 lbs
Main filter Weight:
3 lbs
Total Weight:
27 lbs
Total shipping weight:
29 lbs
10 Years
UL, California Air Resources Board (Model Number: EJ120, EO#: G-16-110)
Technical Specs
Easy to Use
  • Simple, 5 speed digital controls for exact air flow
  • No distracting lights to keep you up at night.
  • No complicated user interface.
  • Easy filter access
  • Don't need a manual to operate the unit.
  • Super quiet.
  • Latest high efficiency EC motor is quieter and uses up to 90% less energy saving since it draws a max of 52 watts and delivers a high 360 pollen CADR air flow.
  • How do you build the ultimate air-cleaning machine? It's simple; you combine the best filters with the best fan and make it in the USA. As allergy and asthma sufferers ourselves, we built the air purifier that we would want to use. Turn your room into a cleanroom!
Best Reliability and Quality
  • Air purifier housing, filters, software, air flow straightener for motor/fan assembly & software, fan electronics, among others made in USA. Only mechanical filtration. No ionizer or anything else that could potentially create ozone.
The Industry-Standard
  • Merv 17 HEPA (99.97%+) performance. Proprietary carbon for advanced gas control. And it's super quiet. Silent on the first two fan speeds and on high much quieter than any other high-end air purifier.
Tested in World Class Labs
  • Merv 17 HEPA (99.97%+) performance. Proprietary carbon for advanced gas control. And it's super quiet. Silent on the first two fan speeds and on high much quieter than any other high-end air purifier..
Energy Savings
  • Average Energy Savings: $168/year
What's Included
what's included

1 EJ Air Purifier

Complete set of filters

User's Manual

The Best Filters

HEPA filters were invented in America and through engineering and rigorous testing in America we have improved the HEPA filters. Carbon is widely used for gas removal however does not work well in humid environments or for formaldehyde so we developed a proprietary treatment to solve these problems. To ensure the highest quality and safety we make our air purifiers in America.

We are focused on improving the most important part of your life - protecting the health for you and your family. The EJ air purifier has two filters – a 1” deep pleated activated carbon filter and a 3” deep main HEPA filter. Effective for gases for smoke and gas leaks (methane gas, sulfur gases, and many others).

Note: for heavy smoke or odors the HEPA filter can be removed and replaced with two additional carbon filters.

EJ air purifier

Formaldehyde Removal: 99.78% (48 hr test)

Sulfur Dioxide Removal: 99.39% (48 hr test)

Nitrogen Dioxide Removal: 99.97% (48 hr test)

The main filter is the same industrial filter that is trusted by hospitals and removes much more than any true HEPA filter.

EJ air purifier
Filter Sequence

If you remove the filters, the white HEPA filter should be inserted first with the black seal facing inwards (in the picture we show the seal so you can see it although be sure to place the seal facing in). This will ensure it makes a tight seal with the metal frame of the air purifier. The carbon filter is installed next and also acts as a pre-filter. So, when you open the front cover the first filter you should see is the carbon filter.

EJ air purifier

Pre-filter is 1" deep carbon pleated filter with our proprietary gas filter media that is effective for a wide range of gases and odors. We've improved our carbon filter to have 50% more carbon surface area to better remove all gases.HEPA main filter (99.97%+ at 0.3 microns) is 3" deep

Having more filter media means the main filter will last longer (1+ years) and it creates less air resistance. By not having to work as hard the motor can spin at a slower, quieter rate. These are the same filters used in Hospital Operating Rooms, the Nuclear Industry, Containment units, Laboratories, and Pharmaceuticals.

The Best Motor/Fan

EJ (like our Erik series) has the best, latest German engineered EC motor and fan so it provides higher air flow while being quieter and using much less power. The EC motor is a much-improved technology over the traditional AC motor that nearly every other air purifier uses.

AC motors use technology that was developed in the 1800’s and use more energy, can have an annoying hum, and are not as reliable. They are common because they are very inexpensive to produce.

Placement- we suggest placing the air purifier in the room where you spend most of your time. For most this is a bedroom where the unit stays plugged in and runs 24/7 or whenever you are in the room.

EC Motor Advantages

EC (Electrically Commutated) motors use software and electronics to convert the AC voltage to DC to run the motor. EC is the latest technology innovation whereas AC motors use technology from nearly 200 years ago. With an AC motor from China, chances are that the copper was wound by hand and the ball bearings are of low quality making it unreliable.

  • EC motors are DC so they are more efficient and use up to 90% less power and in the long term can provide significant cost savings.
  • Runs cooler so greater reliability.
  • More compact
  • Has a proven track record in the telecomm and computer industry.
  • No motor hum that you get with an AC motor.

Why does the motor/fan start and stop more slowly than an AC motor? EC motors have a soft start programmed into the motor to limit the start-up current the motor draws (there are electronics and software built into the motor). The ramp down after power is removed is only a function of the inertia of the fan and the friction of the bearing system. A high quality bearing system will take longer to slow down and stop since the friction is minimized (alignment is better, lubricant is better, etc.).

Motor Humming 101

The humming noise comes from the fact that it is an AC motor and all the magnetics are changing intensity at the line frequency. When rotating, these forces are aligned so as to rotate the rotor. When the motor is not rotating or rotating at a speed lower than synchronous speed, they tend to make things vibrate back and forth and that makes the humming sound. If you have an AC motor that starts slowly, the humming starts louder and decreases as the rotor and field come into sync.

Room Size

Up to 1,250 sq ft with 2 air changes per hour. Learn more about air purifier room size and see AHAM Verifide results.

Perfect for large home living areas, offices, healthcare facilities, nursing homes, mold and asbestos abatement and any other small to large square footage space that requires portable air cleaning.

The EJ is super quiet - in fact the quietest air purifier on the market for the given air flow. And on the lowest fan speeds we could not detect any sound in the sound chamber testing.

EJ air purifier

Where Are the Key Parts Made?

  • Housing - USA
  • Circuit Board - USA
  • Filters - USA
  • Motor/Fan System - USA & Germany

PayPal 6 Months No Interest Financing

To apply for the no interest financing, select Paypal in the checkout. This financing is offered by Paypal and subject to their credit approval.

Here is a summary of the terms: Get No Interest if paid in full in 6 months on purchases of $99 or more when you check out with PayPal Credit. Interest will be charged to your account from the purchase date if the balance is not paid in full within the promotional period. Minimum monthly payments required.

See Paypal Credit for more information.

Brands Using Oransi

Oransi air purifiers are used by some of the leading companies, medical centers, government organizations and universities. We are delighted to be able to provide clean air to so many quality organizations.

American red cross

Still Have Questions?

The EJ120 Air Purifier is a high-performing product that is the result of over 1,000 engineering hours. Naturally, you may have some questions for us. Luckily, we have the answers.

See Questions & Answers >

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