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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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20x30x1 AIRx DUST Air Filter, 4-Pack

5
155 reviews
◆
 
Average rating 4.7/5
5 stars
(123)
4 stars
(24)
3 stars
(4)
2 stars
(2)
1 star
(2)
AIRx 20x30x1-DUSTOur#: 194950
Made in USA
20x30x1 AIRx DUST Air Filter, 4-Pack
20x30x1 AIRx DUST Air Filter, 4-Pack
20x30x1 AIRx DUST Air Filter, 4-Pack
20x30x1 AIRx DUST Air Filter, 4-Pack
20x30x1 AIRx DUST Air Filter, 4-Pack
20x30x1 AIRx DUST Air Filter, 4-Pack
20x30x1 AIRx DUST Air Filter, 4-Pack
20x30x1 AIRx DUST 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 protect your HVAC system, keep your house a little cleaner, and remove a few nuisance particles from the air you breathe then yes, this is the filter for you! Not everyone needs to get rid of odors, and not everyone is overly sensitive to allergens and other, more harmful, particulates in their air. We make shopping for air conditioner filters and furnace filters easy!
Entry-level pleated air filter offers improved filtration over common fiberglass filters
MERV 8 rating means the filter attracts common large household allergens like dust, pollen, and mold spores
Replace every 90 days under normal use
Made with pride in the USA
100% free returns on all filters

$59.95

$74.94
Code DF20 · Save 20%
$14.99 per filter
Code DF20 · Save 20%
SAVE 40% 4-pack

Pack Size

Filtration Level

Compare all →
In Stock, Ships onWednesday, Sep. 30th
Just $70.00 more for free shipping! Get this — more unlocks 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 × 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
8 17 50 70 Initial Resistance (IWC) 0.07 0.11 0.17 0.23 0.17 *
MERV
8
(µm) PSE (%)
0.3-1.0 17
1.0-3.0 50
3.0-10 70
Airflow Rate (CFM) Initial Resistance (IWC)
615 0.07
922 0.11
1229 0.17
1536 0.23
1229 * 0.17 *
* Max Rated Airflow

Replaces These Filters

National Filter Sales

PF-01-203001-6

About This Product

Is this the right air filter for you?

If you want to protect your HVAC system, keep your house a little cleaner, and remove a few nuisance particles from the air you breathe then yes, this is the filter for you!  Not everyone needs to get rid of odors, and not everyone is overly sensitive to allergens and other, more harmful, particulates in their air.  We make shopping for air conditioner filters and furnace filters easy!

  • Entry-level pleated air filter offers improved filtration over common fiberglass filters
  • MERV 8 rating means the filter attracts common large household allergens like dust, pollen, and mold spores
  • 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
155 verified reviews
5★
(123)
4★
(24)
3★
(4)
2★
(2)
1★
(2)
5
4.7 / 5 (155)
customer 7 days ago
5
The quality of the dust air filters is fantastic. I ordered the filters that will reduce dust and other pollutants from your heating and cooling system. The filters are well constructed.
Michael S. 81 days ago
5
Convenient
Customer 102 days ago
5
Good product and value
L S. 107 days ago
5
Works well
Robert E. 201 days ago
5
Exactly what I needed.
John E. 267 days ago
5
1/8 of an inch wider than my old ones which is a perfect fit.
Beverly R. 429 days ago
5
Filters are good quality and arrived promptly. Will use again.
B O. 474 days ago
4
I have been using this product for a few years now, so I like the product. However, this time, I paid $9.99 for shipping expecting the product to be delivered without issues like the last time I ordered the same product. I had two issues with the delivery of this product. The package was not delivered on the date that you told me, instead it was delivered on June 3, 2025. Although not a show stopper, the filters were delivered with minor bends in them. I had paid $9.99 for shipping so that damage would not happen to the filters.
John T. 526 days ago
5
I think it’s great quality and a very fair price
Sharon g. 657 days ago
5
I appreciate the ease and speed with which my order was processed and arrived at my house. I was able to get a new filter put in quickly and am well supplied for the future.
Robert C. 673 days ago
5
All good, just a little expensive like everything
Jim F. 685 days ago
5
Great filters for our home. Have been buying from Discount Filters for many years. Great service and prices.
Joann C. 770 days ago
5
Works very well.
Robert S. 798 days ago
5
Saves us a lot money
Edward O. 808 days ago
5
I keep hearing the high MERV filters make your HVAC work too hard. I was happy to find a MERV 4 option. These are well made and work great for me.
Linda W. 828 days ago
5
Fast delivery, great product
Harold R. 877 days ago
5
I am pleased with the service
Vivi 941 days ago
5
Have used these since furnace cleaners recommended them. They’re great.
Cheryl H. 1004 days ago
5
They are shipped to my house, the fit perfectly.
wallace d. 1026 days ago
4
goodproduct
Robin 1056 days ago
5
These filters do a great job and home delivery makes my life easier as this size isn’t as easy to find. Fantastic customer service!
Jim F. 1058 days ago
5
Good product. Holds up in dusty central Arizona
william s. 1123 days ago
4
good quality product promptly shipped to my residence.
TheresaK 1155 days ago
5
Good filters at a better price than at stores, if you can find this size in a store.
David W. 1174 days ago
5
Have used these for several years. Good quality for a good price.
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