You deserve clean air.

The Defender air purifier eliminates the SARS-CoV-2 virus by over 99.9% within 90 minutes.

Why the Defender is a smart choice:


100% Refundable,
30 Day Trial

Worry Free. If you are unsatisfied with your purchase, simply return for a full refund within 30 days.

COVID Capture Technology

Verified Results. 99.9% capture rate, with over 95% of the captured pathogen verified as destroyed in the first 24 hours.

Unmatched Warranty

Peace of Mind. The Defender includes an industry leading LIFETIME perpetual warranty.

three defenders
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Defender Air Purifier

✓ FDA-cleared Class II Medical Device

✓ Eliminate 99.99% of bacteria, allergens, mold and more

✓ Eliminates and destroys the SARS-CoV-2 virus and other viruses like it

✓ Lifetime Perpetual Warranty

✓ Free 2-Day Shipping

✓ For large spaces up to 700 sq. ft.

✓ FDA-cleared Class II Medical Device

✓ Eliminate 99.9% of bacteria, allergens, mold & more

✓ Eliminates and destroys the SARS-CoV-2 virus and other viruses like it

✓ Lifetime Perpetual Warranty

✓ Free 2-Day Shipping

✓ For large spaces up to 700 sq. ft.

Sold out

or 4 Interest Free Payments of $199.75. Choose Shop Pay at checkout.


free shipping

Free 2-Day Shipping

Delivered Quick. The Defender includes free 2-day shipping anywhere in the USA.

Assembled In The USA

USA Assembled. From the Ohio, USA manufacturing facility directly to you.  


Established Dependability. Millions of satisfied customers worldwide have trusted FilterQueen for nearly 100 years.

See what actual customers are saying:

We are so pleased with the Defender. I feel blessed to have our family healthy, especially living in a much older home, so I'm grateful.

– Ezechaelle Norris
Euclid, OH

Learn more about NASA's enhancements to the Defender.



"My son suffers from severe allergies from trees, grasses and weeds, and it gets tracked in and trapped in the house. But with the Defenders, it makes his life indoors tolerable. I don't have to dust as frequently, leaving me time for other things. I can't remember the last time anyone in the family was truly sick. Best investment I ever made for my family's health!"

Geraldine T.

Washington, USA



"I personally use the Defender in my home as well as in my medical office. Since using the Defender at home, I have noticed a big difference in the air quality in my house. Also, I do suffer from seasonal allergies, and I have noticed since using the Defender, I have not been congested and I am able to sleep through the night without being congested. Patients have also commented on the air quality in my office since the installation of the Defender. I would highly recommend the Defender for allergy sufferers as well as people with breathing disorders such as asthma and COPD."

John B.

North Carolina, USA




"With the amount of patient traffic and doctors we have in our clinic, I’ve gone ahead and put the Defender in each of our three office locations to try and mitigate the risk associated with aerosolized infections"

MK Batra MD

California, USA



How the Defender works

360° Air Intake

The lower half of the Defender pulls air in from every angle, no matter which way the machine is facing.

VOC & Odor Capture

Air filters through the Enviropure Activated Charcoal Wrap, capturing numerous types of harmful VOCs and unwanted odors from the room.

Particle Capture

Air filters through the better-than-HEPA Medi-Filter Cartridge, capturing harmful particles down to 0.1 micron in size.

360° of Purified Air

The Defender circulates clean air back into the room from the top half of the machine.

HEPA is the industry standard (99.97% at 0.3 micron). Our filters have been independently tested to remove 99.99% of particles down to 0.1 micron in size.

particle comparison chart
free shipping

Free 2-Day Shipping

The Defender includes free 2-day shipping anywhere in the USA. Order today and start enjoying fresh air within 2 business days.

unmatched warranty

Unmatched Warranty

We offer a LIFETIME perpetual warranty for the Defender Air Purifier. Purchase and replace your Medi-Filter Cartridge each year and enjoy a lifetime of clean, purified air.

90 years in business

Over 90 Years In Business

In the last few years, other companies have tried to take advantage of the urgency to protect the indoor air. Healthy indoor air quality has been our way of life since 1928.

3x better-than-HEPA filtration

Removes 99.99% of many harmful airborne particles that standard true HEPA air filters leave behind.

virus bacteria drawing

Viruses & Bacteria

mold spores drawing

Mold Spores

dust mites drawing

Dust Mites

pet dander drawing

Pet Dander

smoke drawing

Smoke Particles

pollen drawing

Pollen & more

Meets the following EPA guidelines:

does not produce ozone

Does not produce ozone

Ozone is harmful to the environment.

no uv light

No UV light

UV light is ineffective, costly and dangerous.

effective filtration

Effective filtration capability

3x better-than-HEPA standard.

360° Intake & Exhaust

Polluted air is pulled in from all sides through both filters. Secure Seal Technology ensures that pure, clean air returns to the room.

Lightweight & portable

Moves easily from room to room, providing a healthier home, work, college, or travel environment.

Quiet, 24-hour operation

Enjoy a significant reduction in airborne pollutants and dusts, allowing you to breathe easier and get a better night's sleep.

Help keep your family healthy with purified air.

Medi-Filter Cartridge

Provides three times better-than-HEPA filtration to remove harmful airborne pollutants, such as dust mites, mold spores, viruses, bacteria, pet dander, airborne chemicals and more.

Filter change frequency – 12 months

Enviropure Charcoal Wrap

Made with HEGA (High Efficiency Gas Absorption) material, which is highly effective at removing harmful pollutants and odors, such as VOCs, cigarette smoke, and more.

Filter change frequency – 6 months

Defender Tech Specs

FDA-Cleared Class II Medical Device

FDA Clearance:

510(k) Class II medical device (#K010616)


17.5" height x 12.25" diameter


12.75 pounds

Speed Controls:


Square Foot Coverage:

up to 700 sq. ft.

Air Outlet:

360° Pure Top Release


Brushless high efficiency motor
(100,000 hours expected life)
120V / 60Hz / 85W


0.67 (high)
0.38 (medium)
0.24 (low)


Standard 110/120 U.S. Outlet


Polarized Type A Plug

CSA Approved:



High Speed — 65
Medium Speed — 56
Low Speed — 46

Filtration Level:

> 99.99% at 0.1 micron

Bacterial Filtration Efficiency (BFE):


MERV Equivalent Filtration Rating:



Lifetime Perpetual Warranty

Customer Reviews

Based on 179 reviews
Todd A.
Amazing Air Cleaner

I live the new look and color options. I purchased 2 units and they are amazing with the allergies 🤧. Very quiet and easy to use.

Joanne F.
Love it

Love it so much bought one for our winter home. While being outside or in someone else's home my voice just about disappears, return home and it clears up to normal.

John F.
Great Products

We have used filter queen since the '70s.

Erica C.
This is my second purchase

This is our second Air purifier only because we have moved to a larger space. We have a family childcare home and I believe this is a big part of how I have not been sick in over 2 years despite children being great germ spreaders!! I would and do recommend!!

Always dependable

I just purchased me third defender and now have them in all of our bedrooms. Filtration is the best and they are very dependable. I trust letting them run 24/7 in my home. The price is worth the quality!