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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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16x20x1 AIRx ALLERGY Air Filter, 4-Pack

5
383 reviews
◆
 
Average rating 4.8/5
5 stars
(335)
4 stars
(40)
3 stars
(4)
2 stars
(0)
1 star
(4)
AIRx 16x20x1-ALLERGYOur#: 193879
Made in USA
16x20x1 AIRx ALLERGY Air Filter, 4-Pack
16x20x1 AIRx ALLERGY Air Filter, 4-Pack
16x20x1 AIRx ALLERGY Air Filter, 4-Pack
16x20x1 AIRx ALLERGY Air Filter, 4-Pack
16x20x1 AIRx ALLERGY Air Filter, 4-Pack
16x20x1 AIRx ALLERGY Air Filter, 4-Pack
16x20x1 AIRx ALLERGY Air Filter, 4-Pack
16x20x1 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 many sizes of air conditioner filtesr or furnace filters. 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
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.

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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
16 × 20 × 1"
Actual Size
15 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) 328 492 656 819 656 * * 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)
328 0.09
492 0.13
656 0.19
819 0.25
656 * 0.19 *
* Max Rated Airflow

Replaces These Filters

National Filter Sales

PF-02-162001-6

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 many sizes of air conditioner filtesr or furnace filters. 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
383 verified reviews
5★
(335)
4★
(40)
3★
(4)
2★
(0)
1★
(4)
5
4.8 / 5 (383)
BETH W. 13 days ago
5
Good price & delivered to your door.
Carla O. 38 days ago
5
I have pets and this product takes care of pet dander and more. The air is more clear using this product.
Wes J. 53 days ago
4
Merv 11 Filters arrived quickly, fit well and were at a very good price. Because I do not have the equipment to really test them for efficiency and air flow, I gave them 4 stars and assume the manufacturers ratings are accurate. I change filters every two months regardless of season.
Carol P. 85 days ago
5
Efficient!!
Keith B. 152 days ago
5
Standard size for our home HVAC units. Three intake filters in our house. Good air quality for pet dander, dust and allergens. Good value.
Rea B. 156 days ago
5
yes, very good.
Mark M. 183 days ago
5
High quality product. Easy ordering process. Efficient delivery
Suzanne P. 237 days ago
5
I've been using these filters for a couple of years now because they fit perfectly in my furnace and while I don't find much relief from dust, they do as well as any other filter I've tried.
James 279 days ago
5
Highest quality. Best price. I only deal with this company for my filters. Great company.
Vernon F. 286 days ago
5
Great as always, appreciate it!
pc 337 days ago
5
They are easy to install and take out
Jacqueline K. 343 days ago
5
I have been using the allergy filters in two different sizes for about 5 years. The filters have gotten a little "pricey" but the quality remains the same so I continue to use them. Always replenish when there is a discounted sale. I change more frequently than necessary but consider it cheap insurance for my HVAC system.
Diane W. 368 days ago
5
I love these filters!! They work great and keep my furnace running really well. I’ve used them for 3 years and at each furnace check up the Tech is impressed with how well they keep my furnace running clean and efficient. I buy 12 once a year and switch them out every 30-33 days. A 12 pack is very affordable at less than $10 each.
CONSTANCE 374 days ago
5
Great product
STEPHEN A. 385 days ago
5
Excellent quality and fast delivery.
William G. 388 days ago
5
Don't see any difference between your filters and the ones that cost twice as much.
Jo V. 438 days ago
5
Very pleased with product's quality. Having it shipped to my home is really convenient. Next time I will buy a years worth.
Harold T. 445 days ago
5
Good valve fast delivery all good!
Bruce J. 455 days ago
5
Been using Discount Filters for a couple of years now. I need the allergy Filters for my condo. They work every bit as well as the brand name Filters without the higher cost. Recommended.
steven a. 459 days ago
4
I like the filters for our current needs. Good fit.
lsl 467 days ago
5
I feel better knowing that I have allergy help and cost is less that the furnace people charge.
Jerome H. 496 days ago
5
They are great.
Elena P. 515 days ago
5
I always use a certified water filter and these are the best.
Carol D. 520 days ago
5
These filters should help with my allergies. It was easy to order fast for delivery. I didn’t need anything more than that.
Louise K. 544 days ago
5
These filters are exactly what I was looking for. The Customer Service Rep., Ryan, was most helpful with my order. I will be using this website for future purchases.
Patricia S. 612 days ago
5
works very well.
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