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  • 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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  • 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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We don't know what's in your water,
but we know there's nothing in your cart.

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10x20x1 AIRx ALLERGY Air Filter, 4-Pack

5
53 reviews
◆
 
Average rating 4.7/5
5 stars
(45)
4 stars
(5)
3 stars
(0)
2 stars
(1)
1 star
(2)
AIRx 10x20x1-ALLERGYOur#: 194126
Made in USA
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
10x20x1 AIRx ALLERGY Air Filter, 4-Pack
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

$54.95

$68.69
Code DF20 · Save 20%
$13.74 per filter
Code DF20 · Save 20%
SAVE 43% 4-pack

Pack Size

Filtration Level

Compare all →
In Stock, Ships onTuesday, Sep. 29th
You're $70.00 away from free shipping! Buy this and you're only from free shipping! Buy this and your order ships free!

Orders over $70 ship free. $5.99 otherwise.

Your Order Ships Free!

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
10 × 20 × 1"
Actual Size
9 ½ × 19 ½ × 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) 205 307 410 512 410 * * 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)
205 0.09
307 0.13
410 0.19
512 0.25
410 * 0.19 *
* Max Rated Airflow

Replaces These Filters

National Filter Sales

PF-02-102001-6

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

4.7 4.7 out of 5 stars
53 verified reviews
5★
(45)
4★
(5)
3★
(0)
2★
(1)
1★
(2)
5
4.7 / 5 (53)
Gregory M. 147 days ago
5
Perfect 10"x20" MERV 11 filter, for the filter box on the intake of my HRV. Installers too #$%&ing stupid to see the absolute necessity of it.
Gary W. 263 days ago
5
Based on what I know/don't know about filters.... They seem of good quality. Once fully removed, although dirty, they're still in good overall condition - "durable". The filters must be of good quality, or I wouldn't be continuing my order(s).
Susan U. 283 days ago
5
I always purchase from Discount Filters. For me, it is economical to buy 6 at a time. These filters do as they say in filtering dirt, pollens, and pet dander.
Darren H. 341 days ago
5
Great filters. Delivery to my house is really convenient. Buying from Discount Filters is a terrific value— top notch filters for the best pricing I’ve been able to find.
jeffrey m. 427 days ago
5
Perfect fit. Great Price. It does filter out some nasty things in the air. I would recommend this product.
Patrick M. 535 days ago
5
Very well constructed. Work extremely well filtering . Notice an immediate difference upon changing out filters. Quite the value with easy ordering and quick delivery. Have a wide array of sizes to choose from
Susan U. 795 days ago
5
I have ordered this filter previously. I find order in bulk, 6 at a time, cost effective for me. I like having the filters delivered to me.
Gary W. 807 days ago
5
I like the filters because they seem to perform well in keeping my HVAC system clean from the dirt that would/might
Deborah P. 1051 days ago
5
Having quality air filters delivered to our home beats searching for a slightly rare sized filter in local stores. I'm a long-term customer and have no plans to change this.
ANN N. 1106 days ago
5
Furnace filter prices have increased so much. I’m pleased with these.
James 1543 days ago
4
I put these in last week. So I can't testify as to their quality. So far, they have been working fine. I will let you know in a month or two. I appreciated the cost. they were less than most of the filters I buy.
cherie m. 1584 days ago
5
Great product at a great price. Easy to order and quick delivery.
Carla L. 1627 days ago
5
Great service
Ed 1670 days ago
5
Upgraded by one level as Spring is approaching. Will see how these filters work against allergens.
Jotta C. 1696 days ago
5
Will definitely use this company again. Received great service, exact product ordered and speedy service.
Gregory w. 1717 days ago
5
Works well, perfect fit
Gregory M. 1777 days ago
5
I use these filters in a 10x20 filter box in the intake duct for my HRV. There are two screens outside at the hood, coarse and medium, and I've fashioned a bag filter in the intake of the box, which is about 5 ft. from the hood. The upwind side of the filter is filthy, with bugs, Iowa topsoil, pollen, vegitative chaff, etc. Downwind there is no dust at all, and the HRV itself is of course absolutely pristeen. I check the filters every two months, washing and/or changing them out PRN. Usually they're pretty gross, especially the bag filter. These are good filters. They catch everthing that gets by the upstream parts, and don't restrict the airflow enough to unbalance the system. I got a good deal on 12 of them, so I will have to add a codocil to my Last Will and Testament to leave them to someone.
clive s. 1780 days ago
5
Satisfied
Milton H. 1802 days ago
5
Great quality and easy to use
David H. 1891 days ago
5
Awesome filters and great value.
LM 1923 days ago
4
filters are as expected and delivery was very prompt
Catherine B. 1987 days ago
5
Your product is great, and delivery time is awesome.
Valued C. 2022 days ago
5
fast service Product fits better than any other filter I have purchased
Allen W. 2029 days ago
5
These filters do a great job of keeping Dustin dirt out of the ductwork.
SCHWERZLER/TRAUDE S. 2030 days ago
5
Customer service courteous and helpful.
Don D. 2258 days ago
5
Appears to be good quality.
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