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20x25x1 MERV 13 Pleated Air Filter

 

Actual Size: 19 1/2" x 24 1/2" x 3/4"

$66.96$11.16/ea
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RESIDENTIAL AND/OR COMMERCIAL USE

Change Every 3 Months

About

  • This is a list 20x25x1 MERV 13 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
  • Actual air filter size: 19 1/2" x 24 1/2" 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 20x25x1 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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Save Up to 70% Per Filter with Packs

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., 20x25x1).
  • 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 1/2" x 24 1/2" 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 1/2" "
Nom 1"Act 3/4"
Nom 25"Act 24 1/2" "
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 1/2" x 24 1/2" x 3/4" in → 20x25x1 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 25 x 1 inches
Actual Size19 1/2" x 24 1/2" 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 20x25x1 MERV 13 Pleated HVAC & Furnace Air Filters for Home from Filterbuy

At Filterbuy.com, we’ve helped thousands of homeowners upgrade their indoor air quality—and we’ve seen firsthand how a premium 20x25x1 MERV 13 pleated filter can make a measurable difference. Designed, manufactured, and quality-tested right here in the USA, our filters are built to capture even the smallest airborne particles, from pollen and pet dander to bacteria and smoke. What sets us apart? Unlike mass-produced generic filters, ours are crafted for long-lasting performance, precise fit, and maximum airflow—based on years of customer feedback and in-house HVAC expertise. If you’re searching for the best filter for your HVAC or furnace system, this page will show you why Filterbuy is the trusted choice for cleaner, healthier air.

Top Takeaways

The 20x25x1 MERV 13 pleated air filter from Filterbuy is engineered for homeowners who prioritize cleaner, healthier indoor air. With superior filtration performance, it captures 98% of airborne particles—including allergens, mold spores, pet dander, fine dust, bacteria, and smoke—making it ideal for allergy sufferers, pet owners, and anyone concerned with air quality.

What makes Filterbuy’s filters different? Unlike off-the-shelf options, our filters are made in the USA using industrial-grade materials, moisture-resistant frames, and electrostatically charged synthetic media for enhanced particle capture without compromising airflow. We rigorously test each filter for durability and efficiency based on insights from years of customer use and HVAC service feedback.

Each filter is precision-cut to fit standard HVAC and furnace systems, ensuring easy installation and reliable performance. Plus, with fast shipping and subscription options available, you’ll never forget to replace your filter again. If you’re ready to upgrade your home’s air filtration system, Filterbuy makes it easy to buy the best—and breathe the difference.

20x25x1 MERV 13 Furnace & HVAC Air Conditioner Filter

“Over the years, we’ve seen how the right filter—especially a MERV 13—can drastically improve indoor air quality for families struggling with allergies or poor ventilation. That’s why we designed our 20x25x1 pleated filters to go beyond standard specs—based on direct feedback from HVAC professionals and thousands of homeowners. At Filterbuy, we don’t just manufacture filters—we build solutions we’d trust in our own homes.”

Supporting Statistics: What the Research—and Our Customers—Say

We’ve seen it firsthand: better filters lead to better air. Here’s how national research supports what homeowners using Filterbuy’s 20x25x1 MERV 13 filters already experience.

1. Up to 95% Fewer Airborne Particles

2. Captures 85%+ of Allergy-Triggering Particles

3. Recommended by CDC, EPA & ASHRAE

Why It Matters

Final Thought & Opinion: What We’ve Learned—and What We Recommend

We've worked with thousands of homeowners—and one thing is clear: The air filter you choose makes a real difference.

✅ Why the 20x25x1 MERV 13 Filter Stands Out

“We've had customers tell us their HVAC runs smoother and their allergies ease up fast. We’ve experienced it ourselves.”

🧠 Our Perspective from the Field

  1. MERV 13 isn’t optional anymore – It’s the new standard for healthier indoor living

  2. Real-world tested – Built and validated based on in-home use, not just lab specs.

  3. We use what we sell – Our team installs these filters in our own home.s

The Bottom Line

If you're serious about protecting your air, your health, and your HVAC system, Filterbuy’s 20x25x1 MERV 13 filter is the upgrade worth making.

Cleaner air isn’t just a goal. It’s a guarantee—when you choose the right filter.

Next Steps: Breathe Cleaner Air in 4 Simple Steps

1. Pick Your Filter

2. Add to Cart & Checkout

3. Set & Forget with Auto-Delivery

4. Install with Ease

💡 Need help? Our support team is ready to assist with size, fit, or installation questions.

Frequently Asked Questions

What does a 20x25x1 MERV 13 filter do?

A 20x25x1 MERV 13 filter captures up to 98% of airborne particles—including dust, pollen, pet dander, mold spores, smoke, and bacteria—making it ideal for improving indoor air quality in residential HVAC and furnace systems.

How often should I replace a MERV 13 air filter?

For best results, replace your MERV 13 filter every 60 to 90 days. Homes with pets, allergies, or high dust levels may benefit from more frequent changes (every 30–60 days).

Will a MERV 13 filter restrict airflow in my HVAC system?

Not if your system supports it. Filterbuy’s MERV 13 filters are engineered for low resistance and maximum airflow, but always check your HVAC unit’s specifications or consult an HVAC technician before upgrading from lower MERV ratings.

Is a MERV 13 filter worth it for residential use?

Yes—especially for households with allergy sufferers, pets, or concern over air quality. MERV 13 is recommended by the EPA, CDC, and ASHRAE for its balance of high filtration and airflow compatibility.

Are Filterbuy’s MERV 13 filters made in the USA?

Absolutely. All Filterbuy filters are manufactured in the USA, using high-quality materials and strict quality control standards for reliable, long-lasting performance.