• 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.

Menu

  • 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.

Menu

18x30x1 AIRx ALLERGY Air Filter, 4-Pack

5
50 reviews
◆
 
Average rating 4.7/5
5 stars
(36)
4 stars
(12)
3 stars
(2)
2 stars
(0)
1 star
(0)
AIRx 18x30x1-ALLERGYOur#: 194792
Made in USA
18x30x1 AIRx ALLERGY Air Filter, 4-Pack
18x30x1 AIRx ALLERGY Air Filter, 4-Pack
18x30x1 AIRx ALLERGY Air Filter, 4-Pack
18x30x1 AIRx ALLERGY Air Filter, 4-Pack
18x30x1 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

$69.58

$86.98
Code DF20 · Save 20%
$17.40 per filter
Code DF20 · Save 20%
SAVE 40% 4-pack

Pack Size

Filtration Level

Compare all →
In Stock, Ships onFriday, Oct. 2nd
Add $70.00 more to unlock free shipping! Add this and you're just 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
18 × 30 × 1"
Actual Size
17 ¾ × 29 ¾ × 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) 553 830 1106 1383 1106 * * 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)
553 0.09
830 0.13
1106 0.19
1383 0.25
1106 * 0.19 *
* Max Rated Airflow

Replaces These Filter

National Filter Sales

PF-02-183001-6

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
50 verified reviews
5★
(36)
4★
(12)
3★
(2)
2★
(0)
1★
(0)
5
4.7 / 5 (50)
Joseph M. 27 days ago
5
Excellent products fast delivery will use again
Joseph 141 days ago
4
Good product had a fair price. Just wish the size was like they used to be 8th inch smaller instead of quarter inch smaller than actual size as I have to tape two filters together with a 34 inch gap.
Phil 183 days ago
5
Outstanding Filters very durable. I’ve been using them for years and I’ve never had an issue. Swift delivery and excellent customer service.
OJ 200 days ago
5
Good quality
Larry A. 284 days ago
5
Easy to reoder and got what I wanted and does the job.
D M. 475 days ago
5
These filters are perfect! They help keep the air in the house clean.
michael c. 497 days ago
5
works extremely well on dog and cat hair .
gerald j. 510 days ago
4
typical product
David 746 days ago
4
Once again i havent used these filters yet but they look fine
Thomas B. 800 days ago
5
We have had our kitchen remodeled, resulting in much dust, I am still able to feel comfortable in our house with these filters. Air is good.
Roger S. 966 days ago
5
Great product
C T. 982 days ago
5
good product and fast delivery.
Jane B. 985 days ago
5
very pleased
Randy F. 1016 days ago
5
Good quality for a good price.
Garry W. 1024 days ago
5
Good service, good products, been using DiscountFilters for years.
customerj.j. B. 1033 days ago
5
we have been using this filter for many years, and will buy again..
Steven 1133 days ago
5
These filters are highly recommended. I’ve been using them for years. Very high quality, but not overly priced. Try them for yourself, you won’t be disappointed!
John M. 1858 days ago
5
Very happy with my filter purchase. This quality of filter is not avable locally in this size plus the prompt shipping was very good. I think this will lead to future purchases.
Richard S. 2004 days ago
5
Very satisfied
David L. 2027 days ago
4
Perfect fit, quick service and quality.
Lucille B. 2357 days ago
4
It is a very good filter and works well if used as directed.
Jane B. 2392 days ago
5
filter work very well and affordable.
Michael W. 2652 days ago
5
They do well, and this is my second time buying them. They went up in cost for the same product so not really sure why. They get dirty fairly quick so it tells me they are pulling from the air. They could be a little stronger in the framing part but you won’t be disappointed for what they do.
Brett A. 2781 days ago
4
Not to happy. I have to crush the filter to get it in. Then expand it back out.
Shawn N. 2783 days ago
5
I have noticed less dust in my home.
G O. 2903 days ago
5
Very good product - ALLERGY Air Filter - MERV 11
Curt C. 2993 days ago
5
very good product....best price...quick delivery... Highly recommended!
Julia 3098 days ago
5
All the bedrooms use these small filters and they are great. No problems and I like ordering online.
<
1 2 3
>