• 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.

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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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19.75x21.5x1 AIRx DUST Air Filter

AIRx 19.75x21.5x1-DUSTOur#: 194825
Made in USA
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
19.75x21.5x1 AIRx DUST Air Filter
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

$29.95

$37.44
Code DF20 · Save 20%
$29.95 per filter
Code DF20 · Save 20%
SAVE 0% 1-pack
In Stock, Ships onFriday, Oct. 2nd
Only $70.00 more for free shipping! Add this — just more for 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
19 ¾ × 21 ½ × 1"
Actual Size
19 ¾ × 21 ½ × ⅞"
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

Replaces These Filters

Bryant / Carrier

KFAFK0312LRG

Carrier

FIP417621

National Filter Sales

PF-01-19.75x21.5x01-6

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
98 verified reviews
5★
(80)
4★
(11)
3★
(5)
2★
(2)
1★
(0)
5
4.7 / 5 (98)
mary v. 22 days ago
5
Good like easy to put in
Arturo R. 675 days ago
5
I have not use them.
Diane S. 790 days ago
5
Husband just put one of these in…and they fit perfectly! They are a custom size and my husband measured from our filter that came with our AC…so he did a good job also! But we’re very happy with buying these! Thank you and we will order more!
Kenneth C. 1016 days ago
5
Very good filters and timely delivery
Sophia 1390 days ago
5
Perfect replacement filters
Herald E. 1477 days ago
5
Perfect fit came as ordered.
Robert M. 1713 days ago
5
The product is good.
Yvette S. 1774 days ago
5
We have bought filters for both of our homes and the service and price is just outstanding!
E. S. 1785 days ago
5
We are stuck with an unusual size filter for our AC unit that is not commonly available in typical retail outlets. That said, the service we have received from your company is excellent. You maintain our filter dimensions on file and make it easy to re-order when necessary.
larry t. 1852 days ago
5
Doesn’t get any easier
Richard 2000 days ago
5
Excellent price and service
Raul M. 2007 days ago
5
Quality product at discount prices. The 19.75 x 21.5 filter is a unique size (to one or two HVAC brands) and is usually priced at a premium. The more common 20 x 22 filter can be substituted but discount filters carries the specific 19.75 x 21.5 filter at a competitive price.
George W. 2020 days ago
5
Do a good filtration.
lorraine z. 2396 days ago
4
The Merv 8 filters are exactly what I need for my heater & family lifestyle. I found them to be priced right & the 20% discount made my repeat purchase that much more economical. Happy & pleased to have found Discount Filters. The ordering was easy & the gentleman was very accommodating. Have most recently recommended Discount Filters to a friend. She was pleased to know you exists & plans to order through your company when in need of New/More filters.
Edward K. 2530 days ago
5
Very easy ordering,fast delivery,perfect fit,very fair price
Robert M. 2621 days ago
4
The filters seem to work. I have dust in my house but the filters are very dirty when I change them. I guess that is what a filter is supposed to do. Does the filter remove all the dust no...am I pleased with the filters? I guess so...I keep buying them as I have not found any that do a better job.
Anthony D. 2651 days ago
5
They call this a dust filter but concerned that higher merv rating would constrict the air flow. I change out filter every month because of dog in house- find this keeps the air cleaner.
James B. 2784 days ago
5
The product was shipped and received in a timely manner with no damage to the shipping container.
Todd S. 2866 days ago
5
This is a hard filter to find in home depot and such, then I found Discount Filters and they carry this odd size, Thank you for that!
Roland P. 2884 days ago
5
Exactly as advertised. Excellent product for money.
MH 3109 days ago
5
bryant is a bear to find filters for as they are a weird size. no problem w/discount filters. easy to order and quick to ship
Jo T. 3155 days ago
5
Great quality and sooo much less expensive than OEM product. This is hard to find size but you guys rock!
hector c. 3298 days ago
4
exelent I will order again thanks
Paul G. 3418 days ago
5
good quality, accurate dimension, timely delivery.
Chad 3476 days ago
5
Good air filter - made well - Hopefully made in USA but I forgot to check
Millsboro M. 3578 days ago
5
Great fit, good price...would recommend to a friend
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