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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.

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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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18x30x1 AIRx DUST Air Filter, 4-Pack

5
62 reviews
◆
 
Average rating 4.6/5
5 stars
(50)
4 stars
(4)
3 stars
(5)
2 stars
(2)
1 star
(1)
AIRx 18x30x1-DUSTOur#: 194802
Made in USA
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 AIRx DUST Air Filter, 4-Pack
18x30x1 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

$64.78

$80.98
Code DF20 · Save 20%
$16.20 per filter
Code DF20 · Save 20%
SAVE 44% 4-pack

Pack Size

Filtration Level

Compare all →
In Stock, Ships onWednesday, Sep. 30th
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
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)
553 0.07
830 0.11
1106 0.17
1383 0.23
1106 * 0.17 *
* Max Rated Airflow

Replaces These Filter

National Filter Sales

PF-01-183001-6

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

4.6 4.6 out of 5 stars
62 verified reviews
5★
(50)
4★
(4)
3★
(5)
2★
(2)
1★
(1)
5
4.6 / 5 (62)
Joseph A. 396 days ago
5
i have been purchasing from Discount Filters for many years now and have never been disappointed! Very trusting company and quick shipping! All members of the Discount Filter company keep up the Great Work!!!
Berrilyn M. 730 days ago
5
I change usually every 2 months, prefer to change monthly so would like a monthly set, which should be less costly to the consumer.
Debbie S. 767 days ago
5
Easy to order
Jaime I. 899 days ago
5
This Home Air Filter exceeded my expectations. Easy to install and budget-friendly, it's a must-have for anyone prioritizing air quality. Highly recommended!
Evelyn M. 1169 days ago
5
Excellence product. I highly recommend this product the website & savings for the filters are great. I always recommended the savings to friends & family members. r
Lauren M. 1248 days ago
5
Works great. Easy to order and arrives quickly.
Susan 1312 days ago
5
Have used these now for years and they have worked great.
Charles C. 1651 days ago
5
Received them very promptly.
Joyce M. 1828 days ago
5
Arrived on time.
customer 1905 days ago
5
I am VERY pleased with this companys prices and ease of ordering. Filters arrived quickly -- thank you !!!
Joseph A. 2007 days ago
5
I have been using this filter for some time now and am very happy with its performance. I have been shopping from Discount Filters for many years now and as far as I am concerned they are second to none!!! Keep up the Great Work!!!
Dorothy B. 2030 days ago
5
Better than expected!
RICHARD S. 2306 days ago
5
Perfect size for my need
James B. 2356 days ago
5
Perfect fit. Living in the south it is used 99% of the time for Air conditioning
Kirby F. 2372 days ago
5
It's a fine filter for the price. We've used them for a few years now. Discount Filters ships your order right away and notifies you. They even remind you of what you ordered last time. Good service, good value, A+ all the way around.
Daniel R. 2477 days ago
4
Does a very good job on filtering the air.
Kurt B. 2587 days ago
5
Well made. Shipping was well packed and product arrived in a safe and timely manner.
Joseph A. 2749 days ago
5
I have been purchasing filters from Discount Filters for many years and have always been very happy with their service, delivery times and the products they sell! The HVAC filters work great! My HVAC company recommend that I use this type filter for best results and they were right. I would recommend them to all my family and friends! Discount Filters is the best company I have used for filter purchases.
Eileen M. 2898 days ago
5
Excellent price for a good quality filter. Delivery was quick, I have ordered them before and was very satisfied.
Marty 3038 days ago
5
Discount Filters are great. I am able to find all the odd sizes I cannot find at stores online without having to be driving all over town and still not finding them or pay more for them. Plus they ship them for free. I recommend them to everyone. This size is hard to find
JAMES O. 3079 days ago
5
Arrived promptly in perfect condition, fit perfectly
Christine G. 3248 days ago
5
Professional - easy ordering and delivered right away.
Lou u. 3308 days ago
5
Quality product/Superiour
MH 3314 days ago
5
These are an odd size, so I am glad to know where to order them!!
Thomas B. 3739 days ago
5
Filters were as discribed arrived quickly in excellent condition.It would be so nice if everything I ordered was as good as this.
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