Provide clean air for your business.


Provide clean air for your business.

In stock & FREE 2-day shipping

FREE 1 year supply of filters included

defender white

Defender Air Purifier


4.8 star rating

✓ FDA-cleared Class II Medical Device

✓ 3x better than HEPA filtration

✓ Lifetime perpetual warranty

✓ Quiet, 24-hour operation

✓ Ozone-free

Sold out

Defender Air Purifier


4.8 star rating

✓ FDA-cleared Class II Medical Device

✓ 3x better than HEPA filtration

✓ Lifetime Perpetual Warranty

✓ Quiet, 24-hour operation

✓ Ozone-free

defender white
Sold out


100% Refundable,
30 Day Trial

If you are unsatisfied in any way with your purchase, simply return your Air Purifier for a full refund within 30 days.


Class II Medical Device

The Defender is recognized by the FDA as a Class II Medical Device and is hospital tested.


Assembled In The USA

Our manufacturing and assembly plant is located in Ohio. We have been assembling FilterQueen products right here in the 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.

How small is 0.1 micron?

defender particle chart gif
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.

The Defender removes 99.99% of harmful airborne particles that standard HEPA air filters leave behind.

viruses and bacteria drawing

Viruses & Bacteria

mold spores drawing

Mold Spores

dust mites drawing

Dust Mites

pet dander drawing

Pet Dander

smoke drawing


pollen drawing

Pollen & More

"I can't imagine why anyone wouldn't want to have a Defender in their business."

— Walter, Restaurant Owner

Office buildings

The Defender moves easily from room to room, providing a healthier work environment.

Medical & Dental Offices

Rather than just relying on the building's HVAC system capacity, the CDC recommends using a portable HEPA air filtration unit for dental procedures and in airborne infection isolation rooms.

Restaurants & Bars

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


There is no doubt that the decision is difficult for parents to make in regard to sending their children back to school. You can help make their decision easier by cleaning the air in each classroom with the Defender Air Purifier.

Meets the following EPA guidelines:

Does not produce ozone

Ozone is harmful to the environment.

No UV light

UV light is ineffective, costly and dangerous.

Effective filtration capability

3x better-than-HEPA.

Help protect your staff, patients or clients.

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

See how happy our customers are with the Defender.


"The Police and Firefighters continued to protect us while COVID-19 spread through our communities. I want to make sure that we are doing everything we can to protect them when they come to our store. My employees are family, so I have a responsibility to provide them with the safest possible environment when they return to work. That is why we run the FilterQueen Defender all day in our store. It constantly purifies the air for both us and our valued customers."

– Stonewall Uniforms

Defender Tech Specs

FDA-cleared Class II Medical Device


17.5" height x 12.25" diameter


12 pounds

Speed Controls:


Air Outlet:

360° Pure Top Release


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


0.90 (high)
0.43 (medium)
0.27 (low)


Standard 110/120 U.S. Outlet


Polarized Type A Plug

CSA Approved:



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

Filtration Level:

 > 99.99% at 0.1 micron

Bacterial Filtration Efficiency (BFE):



Lifetime Perpetual Warranty