filterbuy
 

Shop by

Home
>
air filters
>
1 inch
>
20x24x1
>

20x24x1 MERV 8 Pleated Air Filter

 

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

$49.98$8.33/ea
delivery truckFree Delivery
money downFactory-Direct Low Prices, Made in the USA
editor choiceHassle-Free Returns & Free Exchanges
 
 
 
 
 
 
 
 
 
 
Standard
Standard

RESIDENTIAL AND/OR COMMERCIAL USE

Change Every 3 Months

About

  • This is a list 20x24x1 MERV 8 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 8 synthetic media (comparable with MPR 600 & FPR 5) offers standard protection from dust, pollen, and more by trapping 90% 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.

USA flag flying

Proudly Made In The USA

Two delivery boxes from Filterbuy

Fast, Free Shipping on Every Order

All types of air filters from Filterbuy

Premium Materials That Go The Distance

A child and an adult holding the Filterbuy air filter

85,000+ 5-Star Reviews From Happy Customers

Stacked Filterbuy MERV-8 air filters

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., 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.

Auto Delivery Filterbuy

Never forget to replace your air filter again.

  • Save 5% on every order
  • Choose Your Delivery Schedule
  • 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 8 HVAC & Furnace Air Filters for Home from Filterbuy

If you’ve ever struggled with flimsy air filters that barely trap dust or odors, you’ll know how frustrating it is to waste money on replacements that don’t last. At Filterbuy.com, we’ve spent years perfecting our 20x24x1 MERV 8 HVAC and furnace air filters so homeowners like you can enjoy healthier, cleaner air without the hassle. Based on real feedback from thousands of families, we design our filters to balance maximum dust capture, airflow efficiency, and long-lasting durability — so you breathe easier, save money, and trust that your indoor air is truly cleaner.

Top Takeaways

1️⃣ Cleaner Air:

2️⃣ Protect Your HVAC:

3️⃣ Trusted Quality:

4️⃣ Easy & Reliable:

5️⃣ Real Experience:

Why Choose Filterbuy’s 20x24x1 MERV 8 HVAC & Furnace Air Filters

Filterbuy’s 20x24x1 MERV 8 air filters are crafted to capture common household pollutants like dust, pollen, lint, and pet dander, keeping your home’s air noticeably cleaner. Unlike flimsy throwaway filters, our pleated design maximizes surface area for better airflow and longer service life, so you replace filters less often while your HVAC system runs efficiently.

Proudly made in the USA using high-quality, eco-friendly materials, every Filterbuy filter is rigorously tested for reliability and performance. We make ordering easy with fast shipping direct to your door and multiple pack options to fit your replacement schedule and budget.

Breathe easier, protect your HVAC investment, and trust that you’re giving your family the cleanest indoor air possible — that’s the Filterbuy promise.

Best 20x24x1 MERV 8 HVAC & Furnace Air Filter

“After testing thousands of filter designs over the years, we’ve learned that the right MERV 8 filter should do more than just trap dust — it should protect your HVAC system and help families breathe cleaner air every day. That’s why every 20x24x1 filter we make combines durability, airflow efficiency, and real-world performance, so our customers never have to settle for less.”

Supporting Statistics & First-Hand Insights

At Filterbuy, we know clean air matters. Here’s what trusted research — and years of real-world experience — prove:

1️⃣ Indoor Air Can Be 2–5 Times Dirtier

2️⃣ Dirty Filters Waste Energy

3️⃣ Million Suffer From Allergens

Takeaway: Trusted stats + our experience = a filter that keeps your air cleaner, your system protected, and your family healthier — every day.

Final Thought & Opinion

At Filterbuy, we know clean air changes everything. Here’s what we’ve learned first-hand:

Our honest opinion:

1️⃣ A quality 20x24x1 filter is a smart investment.

2️⃣ It protects your air, your system, and your wallet.

3️⃣ Backed by trusted data, real feedback, and our own testing.

Bottom line: Every family deserves cleaner air and real peace of mind. We’re proud to help you breathe easier — one filter at a time.

Next Steps

Take charge of your home’s air. Here’s what to do next:

1️⃣ Check Your Size

2️⃣ Pick Your Pack

3️⃣ Order Online

4️⃣ Replace Regularly

5️⃣ Reach Out Anytime

👉 Shop now. Breathe easier tomorrow.

Frequently Asked Questions

1️⃣ What does a MERV 8 air filter capture?

A MERV 8 filter traps common particles like dust, pollen, pet dander, lint, and mold spores. It helps reduce allergens and keeps indoor air noticeably cleaner.

2️⃣ How often should I replace my 20x24x1 MERV 8 filter?

Replace your filter every 90 days for typical use. If you have pets, allergies, or high dust, check it monthly and change as needed to maintain airflow and air quality.

3️⃣ Are Filterbuy’s filters made in the USA?

Yes! Every Filterbuy filter is proudly made in the USA using high-quality, eco-friendly materials. We stand behind our manufacturing and quality control.

4️⃣ Will a MERV 8 filter affect my HVAC system’s airflow?

No — our pleated MERV 8 filters are designed for a perfect balance of filtration and airflow. They keep your system efficient while blocking unwanted particles.

5️⃣ Can I order these filters in bulk?

Absolutely. Filterbuy offers multi-packs and bulk options so you can stock up, save money, and never miss a filter change.