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    * Orders under $70 ship for $5.99.

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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.

Cart 0

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

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20x30x1 AIRx ALLERGY Air Filter, 4-Pack

5
194 reviews
◆
 
Average rating 4.7/5
5 stars
(161)
4 stars
(18)
3 stars
(10)
2 stars
(1)
1 star
(4)
AIRx 20x30x1-ALLERGYOur#: 194940
Made in USA
20x30x1 AIRx ALLERGY Air Filter, 4-Pack
20x30x1 AIRx ALLERGY Air Filter, 4-Pack
20x30x1 AIRx ALLERGY Air Filter, 4-Pack
20x30x1 AIRx ALLERGY Air Filter, 4-Pack
20x30x1 AIRx ALLERGY Air Filter, 4-Pack
20x30x1 AIRx ALLERGY Air Filter, 4-Pack
20x30x1 AIRx ALLERGY Air Filter, 4-Pack
20x30x1 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

$59.88

$74.85
Code DF20 · Save 20%
$14.97 per filter
Code DF20 · Save 20%
SAVE 40% 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
20 × 30 × 1"
Actual Size
19 ⅝ × 29 ⅝ × 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) 615 922 1229 1536 1229 * * 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)
615 0.09
922 0.13
1229 0.19
1536 0.25
1229 * 0.19 *
* Max Rated Airflow

Replaces These Filters

National Filter Sales

PF-02-203001-6

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
194 verified reviews
5★
(161)
4★
(18)
3★
(10)
2★
(1)
1★
(4)
5
4.7 / 5 (194)
Christopher D. 8 days ago
5
I have always got great customer service from discount filters. After realizing I ordered the wrong size filters they told I didn’t have to return the wrong ones (which I gave to Goodwill) and sent me the correct size for no additional cost. They responded quickly and efficiently in solving my dilemma. I will buy from them again in the future!
Marianne S. 11 days ago
5
Have ordered these filters in the past & am happy with this specific product!
Frank S. 19 days ago
5
After being in the a/c for forty years I know the value of a good filter.
Clare 24 days ago
5
Get quality....long lasting....ease of ordering...well packaged
Janet L. 38 days ago
5
Fast delivery. Exactly what I ordered.
Richard 45 days ago
5
Even with two shutting dogs in the house , it doesn't amazing job!
Linda B. 50 days ago
5
Ordered 6 pack which was cheaper.
JAMES B. 52 days ago
5
Cost increase to much
Glenn R. 220 days ago
5
Excellent product, well constructed and performs as rated.
STAN W. 222 days ago
5
cost & effectiveness
Deborah K. 233 days ago
5
Easy to order and very good price.
Edith K. 249 days ago
5
I have bad allergies. I have had air ducts, dryer ducts cleaned. These filters make a big difference. Thank you!
Barb 337 days ago
5
I have found the quality of the products from Discount Filter to be exceptional, and this purchase has not disappointed me. Delivery was super quick. There is definitely savings to buying in bulk as opposed to purchasing at a local store one at a time. I will be reordering when it is time.
Gerald M. 348 days ago
5
They work.
Neil B. 375 days ago
5
Good product for the money
Gary M. 401 days ago
4
Good product. I really like the convience and sldo the reminders.
Elena P. 515 days ago
5
I use these filters for my downstairs and upstairs air conditioning units. The best for my home use.
Frank S. 531 days ago
5
Quality filters,fits good works for me.
judith p. 610 days ago
5
As long as they filter out what is advertised they are a good purchase. Delivered promptly.
Clare 626 days ago
5
well made....worth the price for cleaner air.....well packaged and arrives quickly
Maureen A. 639 days ago
4
Constant emails are irritating.
Judy L. 652 days ago
5
As always great product.
RONNIE R. 674 days ago
5
does the job. Good price
Linda F. 689 days ago
5
Great filters. Excellent quality. Great sale prices which help a lot. Packing and shipping is the best. Thank you
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