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20x24x1 MERV 13 Pleated Air Filter

 

Actual Size: 19 3/8" x 23 3/8" x 3/4"

$73.98$12.33/ea
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RESIDENTIAL AND/OR COMMERCIAL USE

Change Every 3 Months

About

  • This is a list 20x24x1 MERV 13 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
  • Actual air filter size: 19 3/8" x 23 3/8" x 3/4"
  • MERV 13 synthetic media (comparable with MPR 1500/1900 and FPR 10) offers the best protection from dust, pollen, pet dander, mold, smog, bacteria, and virus carrying particles by trapping 98% of airborne particles without impacting air flow.
  • High-quality construction means electrostatically charged pleated filter media, reinforced wire backing for structural integrity, and a durable frame to resist heat and humidity
  • Built to last 3 months. 300% longer than fiberglass models
  • 100% manufactured in the United States and designed with recyclable materials
  • Learn more about 20x24x1 Air Filters
Quantity

Top-Rated Filters. American Made. Delivered Free.

At Filterbuy, we don't cut corners—we craft high-quality air filters right here in the USA and ship them to your doorstep for free. No delays, no gimmicks—just clean air, made easy. With thousands of five-star reviews and filters built for real life & every HVAC system, it's no wonder why over 4 million families trust Filterbuy.

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Proudly Made In The USA

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All types of air filters from Filterbuy

Premium Materials That Go The Distance

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Things to Know About Filter Sizes

Finger pointing to nominal size

Nominal Size

  • The rounded size printed on your filter or HVAC unit (e.g., 20x24x1).
  • Usually whole numbers to make identifying and ordering easier.
  • A label for compatibility—not the exact measurement.
Finger pointing to actual size

Actual Size

  • The true, trimmed dimensions of the filter (e.g., 19 3/8" x 23 3/8" x 3/4" inches).
  • Filters are manufactured slightly smaller so they slide into the filter slot without forcing.
  • If you don't know your nominal size, measure your filter to get the actual size, then round up to find the nominal size to search on our site.
Help icon

Why the difference?

  • Nominal sizes simplify shopping and standardize categories.
  • Actual sizes ensure the filter fits properly inside your HVAC's filter rack.

How To Find Your Nominal Size When You Don't Know It

Air Filter Explaining Each Size
Nom 20"Act 19 3/8" "
Nom 1"Act 3/4"
Nom 24"Act 23 3/8" "
1

Measure length × width × depth with a tape measure to find the actual size.

2

Round up each dimension to the nearest whole number to get the nominal size. Example: 19 3/8" x 23 3/8" x 3/4" in → 20x24x1 nominal.

3

Search by nominal size on our site for the best fit.

Help icon
Pro tips: If your filter is missing or damaged, measure the filter slot opening the same way.

Why Getting the Right Size Matters

  • Too small? Air can bypass the filter, reducing air quality and efficiency.
  • Too big? It won't fit—risking bent frames and airflow issues.
  • Just right? You get maximum performance, better filtration, and cleaner air.
Free Exchange Policy

Free Exchange Policy

If the filter you buy doesn't fit, we'll send you a better size.

Need a Non-Standard Size?

Need a Non-Standard Size?

Build a custom filter in just a few clicks.

What's a MERV Rating?

MERV stands for Minimum Efficiency Reporting Value—but don't let the technical name fool you. It's just a way to rate how well an air filter traps stuff like dust, pollen, pet dander, and smoke. The higher the MERV number, the more particles it catches—and the cleaner your air will be.

Swipe To See More
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Smoke & Smog
Bacteria
Odors
MERV 8

MERV 8

Comparable to:FPR: 4-7MPR: 600-1000



MERV 11

MERV 11

Comparable to:FPR: 6-9MPR: 1200-1550


MERV 13

MERV 13

Comparable to:FPR: 10MPR: 1900-2800

ODOR ELIMINATOR

ODOR ELIMINATOR

Comparable to:FPR: 10MPR: 1900-2800

What Makes Our Filters Last 90 Days? Quality, From the Inside Out

We build every Filterbuy filter to deliver reliable 90-day performance—thanks to smart design and premium materials that do the heavy lifting. Here's what makes the difference:

Pleated Design

More pleats = more surface area to capture dust and debris, keeping your air cleaner longer.

Electrostatically Charged Media

Pleats are magnetized to attract and trap microscopic particles—like pet dander, pollen, and smoke.

Synthetic Beverage Board Frame

Engineered to resist warping in extreme temperatures and high humidity.

Air Filter Wit Zoom In Key Features

Aluminum Dual Wire Backing

A layer of metal reinforcement keeps pleats evenly spaced and structurally sound—no sagging, even at high airflow.

Made in the USA

Assembled with care. Built to perform. Ships fast, free, and reliably from our U.S. facilities.

How to Install Your Filter in 4 Simple Steps

How to install your filter - Step 1 - return-vent

Turn Off Your HVAC SystemSafety first.

How to install your filter - Step 2 - return-vent

Remove The Old FilterLook for the airflow arrow and make note of the direction.

How to install your filter - Step 3 - return-vent

Slide In Your New FilterArrow should point toward the system (same direction as before).

How to install your filter - Step 4 - return-vent

Turn Your System Back OnAnd enjoy the fresh, clean air.

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Never forget to replace your air filter again.

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  • Edit, Skip, or Cancel Anytime.
Learn More

Pleated Filters vs. Fiberglass—What's the Difference?

Not all air filters are created equal. Pleated filters don't just last longer—they actually clean your air better. Here's how they stack up:

Pleated Filter

Pleated Filters

Efficiency:

High (MERV 8–13) – Traps more particles

Lifespan:

90 days – Long-lasting performance

Air Quality:

Excellent – Cleaner, healthier air

Materials:

Recyclable and durable

Fiberglass Filter

Fiberglass Filters

Efficiency:

Low (MERV 4 or less) – Misses small stuff

Lifespan:

30 days or less – Replace often

Air Quality:

Minimal – Basic protection only

Materials:

Thin, flimsy, and not recyclable

Pleated filters are a no-brainer—more protection, less hassle, and better air for your home.

How Often Should You Change Your Filter?

Changing your filter on time keeps your HVAC system running efficiently—and helps protect your lungs from dust, allergens, and airborne irritants. Here's how often to swap it out based on your needs:

Calendar Illustration Every 90 days

Every 90 Days

Standard Schedule

For most homes without pets or special air quality concerns. Great for general upkeep and energy efficiency.

Calendar Illustration Every 60 days

Every 60 Days

If You Have Pets or Allergies

Shedding fur, dander, and allergy triggers can build up fast. Changing your filter every two months helps keep the air fresher and symptoms at bay.

Calendar Illustration Every 30 days

Every 30 Days

If You Have Respiratory Concerns or Live in Smog/Wildfire Zones

For households affected by smoke, pollution, or respiratory conditions, monthly changes ensure maximum protection.

Help icon
Final tip:
Want to stay on track? Set a reminder—or skip the stress with auto-delivery so fresh filters show up right when you need them.

Don't Just Take Our Word For It...

Got More Questions? We've Got Answers.












Product Specifications

Nominal Size20 x 24 x 1 inches
Actual Size19 3/8" x 23 3/8" x 3/4" inches
Filter TypePleated
MediaElectrostatically Charged
FrameBeverage Board
MERV Ratings Available8, 11, 13, Carbon
LifespanUp to 90 Days
OriginMade in USA

Buy the Best 20x24x1 MERV 13 HVAC & Furnace Air Filters for Home from Filterbuy

At Filterbuy, we know that when it comes to clean air, details matter — and we’ve seen firsthand how upgrading to a MERV 13 filter can transform a home’s air quality. Our 20x24x1 MERV 13 HVAC & Furnace Air Filters are built for homeowners who want top-tier protection that goes beyond trapping dust and pollen.

We designed these filters to capture finer particles — like smoke, bacteria, and microscopic allergens — that many standard filters miss. After years of in-house testing and listening to real customer feedback, we make every MERV 13 filter to deliver hospital-level air filtration while keeping your system running smoothly and energy bills under control.

When you buy direct from Filterbuy.com, you’re choosing filters made in the USA by people who trust them in their own homes first — and ship them straight to yours. Breathe easier, live healthier — that’s our promise.

Top Takeaways

1️⃣ Maximum Protection

2️⃣ Proven Quality

3️⃣ Healthier Air

4️⃣ Energy Efficient

5️⃣ Easy & Reliable

Why Choose Filterbuy’s 20x24x1 MERV 13 Air Filters?

Filterbuy’s 20x24x1 MERV 13 HVAC & Furnace Air Filters offer our highest level of residential filtration, capturing up to 98% of airborne particles — including fine dust, pollen, pet dander, smoke, and even bacteria. This means noticeably cleaner air for families who want the same peace of mind trusted by hospitals and commercial buildings.

Each filter is made in the USA with durable, moisture-resistant materials that won’t warp or degrade before it’s time to replace. Thanks to our precision design, you get a true-to-size fit that installs easily and keeps your HVAC system running efficiently without airflow restriction.

When you order directly from Filterbuy.com, you skip the middleman — getting factory-direct quality, honest pricing, and fast shipping right to your door. Backed by years of real-world testing and customer feedback, our MERV 13 filters deliver the cleaner, healthier air your family deserves.

20x24x1 MERV 13 Furnace & HVAC Air Conditioner Filter

“After testing thousands of filters in real homes, we know a MERV 13 can make all the difference — it’s the filter we trust in our own families’ homes to trap the finest particles and keep the air truly clean. At Filterbuy, we build every filter to deliver hospital-grade performance that homeowners can count on every single day.”

Supporting Statistics

At Filterbuy, we know clean air starts with real data and first-hand results. Here’s why a MERV 13 filter matters:

1️⃣ Indoor Air is Dirtier Than You Think

2️⃣ Smoke & Fine Particles Are Harmful

3️⃣ Better Filters Save Energy

Our takeaway: We test and build every filter to handle what standard filters can’t — so your family can breathe easier, every day.

Final Thought & Opinion

When it comes to clean air, here’s what we know first-hand: not all filters protect your family equally.

Why MERV 13?

What Sets Filterbuy Apart?

1️⃣ We test every filter ourselves.

2️⃣ We use them in our own homes first.

3️⃣ We ship them factory-direct to you.

Our Take: If you want air you can trust — and performance you can see — a MERV 13 is the smart choice. We stand behind every filter because we breathe this air too.

Cleaner air. Proven results. Peace of mind — that’s the Filterbuy promise.

Next Steps

Breathe cleaner air in 3 simple steps:

1️⃣ Check Size

2️⃣ Order Online

3️⃣ Install & Maintain

💡 Tip:

🔗 Next: Order now. Get hospital-level clean air at home with Filterbuy.

Frequently Asked Questions

1️⃣ What does MERV 13 mean?

MERV 13 is a high-efficiency rating. It traps up to 98% of fine particles, including smoke, bacteria, pollen, and dust — ideal for maximum home air quality.

2️⃣ Will a MERV 13 filter restrict my HVAC airflow?

No. Our 20x24x1 MERV 13 filters are designed to maintain healthy airflow while providing hospital-level filtration. Just replace them on schedule to keep your system running smoothly.

3️⃣ How often should I replace my MERV 13 filter?

Every 90 days is recommended. If you have pets, allergies, or heavy dust, check every 60 days for peak performance.

4️⃣ Can MERV 13 help with allergies and asthma?

Yes! The higher filtration captures smaller allergens and particles that trigger asthma and allergy symptoms, giving you cleaner air to breathe.

5️⃣ Why buy MERV 13 filters from Filterbuy?

You get USA-made filters, tested and trusted in real homes. Fast shipping, factory-direct pricing, and optional Auto-Delivery make it easy to keep your air fresh, without the hassle.