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  • Spend $70 or more and your order ships free! We'll get your filters out the door fast so you can enjoy clean air and water.*

    * Orders under $70 ship for $5.99.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

    Learn More

  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

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20x22x1 AIRx ALLERGY Air Filter - MERV 11

5
106 reviews
◆
 
Average rating 4.8/5
5 stars
(83)
4 stars
(22)
3 stars
(0)
2 stars
(0)
1 star
(1)
AIRx 20x22x1-ALLERGYOur#: 109911
Made in USA
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
20x22x1 AIRx ALLERGY Air Filter - MERV 11
Compatibility guarantee — Wrong fit or not happy - we'll make it right, up to a whole year
Change every 3 months
Change every 3 months Swap on schedule for best performance
Made with pride in Greenwood, Indiana
Made with pride in Greenwood, Indiana Your purchase supports American jobs
MERV
MERV Find your ideal filtration level
Compatibility guarantee
Compatibility guarantee Wrong fit or not happy - we'll make it right, up to a whole year

Filter Description

If you want to promote superior air quality in your home, this is the air filter for you! The specialized media in the filter attracts and captures small particles that can cause allergies. We carry your size of air conditioner filter or furnace filter. We offer convenient online ordering and quick shipping right to your door!
Pleated media provides extended surface area for filtration, and low resistance to airflow
MERV 11 rating means the filter attracts household allergens like dust, pollen, mold spores, dander, smoke and smog
Replace every 90 days under normal use
Made with pride in the USA
100% free returns on all filters

$57.30

$137.44
Code DF20 · Save 58%
$9.55 per filter
Code DF20 · Save 58%
SAVE 0% 6-pack

Pack Size

Filtration Level

Compare all →
In Stock, Ships onMonday, Oct. 5th
Add $70.00 more to unlock free shipping! Add this and you're just from free shipping! Buy this and your order ships free!

Orders over $70 ship free. $5.99 otherwise.

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Compare Side-by-Side

MERV Filter Comparison

Choose the filtration level that fits your home — then tap Select to update your cart above.

MERV 8
Standard
DUST
RECOMMENDED
MERV 11
Superior
ALLERGY
OPTIMAL
MERV 13
Optimal
HEALTH
Best For
STANDARD
Residential / Commercial
Healthy Families
SUPERIOR
Residential / Commercial
Allergy Sufferers
OPTIMAL
Residential / Commercial
Premium Protection
Comparable
Ratings		 MPR 600 & FPR 5 MPR 1000–1200 & FPR 7 MPR 1500–1900 & FPR 10
Filtration Captures ≥90% of large particles Captures ≥95% of large particles Captures ≥98% of large particles
Dust, Lint & Debris
Mold, Pollen
Dander, Dust Mites
Smoke & Smog
Bacteria
Odor, VOCs
Your
Filter
MERV 8
Standard
DUST
Best For Residential / Commercial, Healthy Families
Comparable MPR 600 & FPR 5
Filtration Captures ≥90% of large particles
Dust, Lint & Debris
Mold, Pollen
Dander, Dust Mites
Smoke & Smog
Bacteria
Odor, VOCs
RECOMMENDED
MERV 11
Superior
ALLERGY
Best For Residential / Commercial, Allergy Sufferers
Comparable MPR 1000–1200 & FPR 7
Filtration Captures ≥95% of large particles
Dust, Lint & Debris
Mold, Pollen
Dander, Dust Mites
Smoke & Smog
Bacteria
Odor, VOCs
OPTIMAL
MERV 13
Optimal
HEALTH
Best For Residential / Commercial, Premium Protection
Comparable MPR 1500–1900 & FPR 10
Filtration Captures ≥98% of large particles
Dust, Lint & Debris
Mold, Pollen
Dander, Dust Mites
Smoke & Smog
Bacteria
Odor, VOCs

Swipe or use arrows · tap to select

MERV (Minimum Efficiency Reporting Value) is an ASHRAE industry standard for measuring air filter efficiency.

Compatibility guarantee

Wrong fit, leak, or just doesn’t work? We’ll send the right one. Free return shipping for all orders.

365-day satisfaction

Not happy? Send it back any time in the first year — we’ll make it right. Yes, even an open pack you’ve been running for months.

No-hassle returns

No restocking fees, no return-merch authorization mazes — just start a return and our helpful Customer Experience team will assist.

Filter Maintenance

Is it time to change your Filter?

Generally, we recommend you replace your air filters every 90 days. Find out below if you should change your filters more often.

If someone in your home has asthma or allergies change your filter every

6 Weeks

to ensure indoor air quality is at its best.

If you have pets change your filter every

2 Months

to avoid shedding and odor buildup.

If you have young children change your filter every

2–3 Months

as having clean air is even more important with children in your home.

Filter Specifications

What does this filter remove?

Filtration capabilities
Nominal Size
20 × 22 × 1"
Actual Size
19 ½ × 21 7⁄16 × ¾"
Filter Media
Electrostatically charged 100% synthetic gradient media that does not support microbiological growth
Filter Support Grid
30 gauge galvanized expanded metal grid
Frame
Moisture resistant double-wall beverage board
Max Temperature
180F (82C) continuous service, peak 225F (107C)
Max Humidity
Resistant to 100% R.H.
Initial Resistance
0.18" WC
Rated Velocity
295 FPM

Performance Testing

Performance Rating

MERV (µm) PSE (%) 0.3-1.0 1.0-3.0 3.0-10 Airflow Rate (CFM) 451 676 901 1127 901 * * Max Rated Airflow
11 29 68 86 Initial Resistance (IWC) 0.09 0.13 0.19 0.25 0.19 *
MERV
11
(µm) PSE (%)
0.3-1.0 29
1.0-3.0 68
3.0-10 86
Airflow Rate (CFM) Initial Resistance (IWC)
451 0.09
676 0.13
901 0.19
1127 0.25
901 * 0.19 *
* Max Rated Airflow

Replaces These Filters

National Filter Sales

PF-02-202201-6

About This Product

Is this the right air filter for you?

If you want to promote superior air quality in your home, this is the air filter for you!   The specialized media in the filter attracts and captures small particles that can cause allergies.   We carry your size of air conditioner filter or furnace filter.  We offer convenient online ordering and quick shipping right to your door!

  • Pleated media provides extended surface area for filtration, and low resistance to airflow
  • MERV 11 rating means the filter attracts household allergens like dust, pollen, mold spores, dander, smoke and smog
  • Replace every 90 days under normal use
  • Made with pride in the USA
  • 100% free returns on all filters

Customer Reviews

4.8 4.8 out of 5 stars
106 verified reviews
5★
(83)
4★
(22)
3★
(0)
2★
(0)
1★
(1)
5
4.8 / 5 (106)
Morris 403 days ago
5
Its so easy to order from discount filters. My information pops up and the order here in No time . Thank you.
james s. 438 days ago
5
Have always recieved quality products from Discount Filters
Edjan... 440 days ago
4
product good, shipping long, box crushed a bit...
Anthony M. 495 days ago
5
Good fit, uniform surface, sturdy enough for application. On-time delivery.
Walter B. 623 days ago
5
Very good. Works great
Colette P. 640 days ago
5
The allergy filters are good quality. I notice a big difference in a lot less dust collection on furniture with these filters. And Discount filters have hard to find sizes. I recommend them to anyone that wants a good quality filter.
Edward P. 764 days ago
5
Size is right and new application here. Sure it will help with our cat hair. Service was great. Thanks
Rose G. 775 days ago
5
Thank you!
Sally H. 891 days ago
5
I like your sale prices.
de 994 days ago
5
Great product
John D. 1036 days ago
5
6 pack of filters are great to have them on hand for scheduled replacements. Filters work great and fit perfectly,
Janette 1040 days ago
5
These work great with our system and the filters are hard to find locally at time.
Michael M. 1047 days ago
5
Product is excellent - well made, shipped promptly and does what it’s supposed to. The one issue I have is that figuring out discount codes is a pain because I might get one code from discount filter directly but then I find another better one on my own. Hard to tell if I’m getting the best price available.
Janet R. 1069 days ago
5
Consistent product. Serves our purpose.
J W. 1144 days ago
4
Has been installed nearly a month and is working okay!
Jacqueline 1250 days ago
5
Order came very quickly. Filters fit fine.
Brenda D. 1615 days ago
5
It help to breath better
Sara S. 1745 days ago
5
Great product, fast shipping, great price
Mitiku J. 1841 days ago
5
I am fully satisfied.
Byron W. 1848 days ago
5
Filters that were not available at either of the major building supply stores or at a couple of specialty stores were easily found, ordered and delivered here. The product is perfect, the shipping free and the process seamless. My “go to” for all my filter needs in the future.
John S. 1962 days ago
5
The dust sticks to the filter like glue. These are the best filters for the money, good prices and fast shipping. Discount Filters is the best!
RICHARD W. 1966 days ago
5
I have been using these filters for years and will continue to do so.
CARLA H. 2002 days ago
5
Fast delivery
James M. 2022 days ago
5
The AIRx Allergy Filter Merv-11 works and lasts as long as the much more expensive name brands. Mine is an odd size not even carried in the big box stores. Discount Filters always has them in stock. Great service as well.
Donald W. 2023 days ago
4
Product as advertised, fit, and use.
William H. 2201 days ago
5
perfect fit. a step up from what I was using. You can actually breathe the difference after about 2 days. Definitely would but again. Very nice price as well.
Robert R. 2207 days ago
5
Great filters, great company to deal with. Fast free shipping. These filters are made in Indiana.
John S. 2281 days ago
5
top quality filters that really filter the dirt out of the air in my house . The dirt really sticks to the filter . Great price and fast shipping! I definitely recommend these filters !
Doug M. 2445 days ago
4
Arrived in 1 week, good fit
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