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18x24x1 MERV 8 Pleated Air Filter

 

Actual Size: 17.38x23.38x0.75"

$47.94$7.99/ea
delivery truckFree Delivery
money downFactory-Direct Low Prices, Made in the USA
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Standard
Standard

RESIDENTIAL AND/OR COMMERCIAL USE

Change Every 3 Months

About

  • This is a list 18x24x1 MERV 8 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
  • Actual air filter size: 17.38x23.38x0.75"
  • 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 18x24x1 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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Fast, Free Shipping on Every Order

All types of air filters from Filterbuy

Premium Materials That Go The Distance

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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., 18x24x1).
  • 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., 17.38x23.38x0.75" 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 18"Act 17.38"
Nom 1"Act 0.75"
Nom 24"Act 23.38"
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: 17.38x23.38x0.75" in → 18x24x1 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
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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 Size18 x 24 x 1 inches
Actual Size17.38 x 23.38 x 0.75" inches
Filter TypePleated
MediaElectrostatically Charged
FrameBeverage Board
MERV Ratings Available8, 11, 13, Carbon
LifespanUp to 90 Days
OriginMade in USA

Buy the Best 18x24x1 MERV 8 HVAC & Furnace Air Filters for Home from Filterbuy

At Filterbuy.com, we know from decades of experience that the right air filter makes all the difference for your home’s air quality and your HVAC system’s lifespan. That’s why our 18x24x1 MERV 8 HVAC and furnace air filters are carefully engineered to trap the most common indoor pollutants — like dust, pet dander, and pollen — without restricting airflow or driving up energy costs.

Unlike generic filters, every Filterbuy filter is made in the USA using premium, sustainably sourced materials that withstand daily use and frequent filter changes. Based on feedback from thousands of homeowners and our rigorous testing, we’ve fine-tuned our pleated MERV 8 filters to deliver the ideal balance of protection and efficiency, helping families like yours breathe cleaner, healthier air year-round.

Top Takeaways

1️⃣ Breathe Cleaner Air

2️⃣ Save on Energy Bills

3️⃣ Trust Filterbuy Quality

4️⃣ Simple Ordering

5️⃣ Proven & Trusted

When it comes to keeping your home’s air fresh and your HVAC system running smoothly, choosing the right filter matters. Filterbuy’s 18x24x1 MERV 8 air filters are designed to capture common airborne particles like dust, lint, mold spores, and pollen — all while maintaining optimal airflow so your system works efficiently and uses less energy.

Every Filterbuy filter is proudly made in the USA using high-quality, eco-friendly materials and advanced pleated construction for longer-lasting performance. Easy to install and replace, these filters help protect your family’s air quality and extend the life of your furnace or AC unit.

Join thousands of homeowners who trust Filterbuy for clean, healthy air and reliable HVAC protection — all delivered right to your door on your schedule.

An image of Filterbuy 18x24x1 MERV 8 HVAC and furnace air filter for home use

“After manufacturing millions of filters and listening to real feedback from homeowners, we know that a well-made MERV 8 filter strikes the perfect balance — it captures the dust and allergens that matter most without choking your HVAC system. That’s why every Filterbuy filter is built to deliver clean air, energy savings, and peace of mind you can feel with every breath.”

Supporting Statistics & First-Hand Insights

1️⃣ Indoor Air Quality: Hidden Risks

2️⃣ Energy Costs: Stop Wasting Money

3️⃣ Health: Breathe Easier at Home

Our real-world experience + trusted stats = cleaner air, lower costs, healthier families.

Final Thought & Opinion

When it comes to your home’s air, there’s no room for shortcuts. We see it every day — the right filter choice makes all the difference.

What we’ve learned first-hand:

Why it matters:

1️⃣ Healthier air for your family.

2️⃣ Lower energy bills, longer system life.

3️⃣ Peace of mind you can feel with every breath.

In our opinion, it’s simple: Filter smart. Breathe easy. That’s the Filterbuy way.

Next Steps

Ready to get started? Follow these quick steps:

1️⃣ Check Your Size

2️⃣ Pick Your Pack

3️⃣ Order Online

4️⃣ Swap & Breathe Easy

Need help?

Tap here to order your filters today!

Frequently Asked Questions

1️⃣ What does MERV 8 mean for air filters?

MERV stands for Minimum Efficiency Reporting Value. A MERV 8 filter is designed to trap everyday particles like dust, pollen, mold spores, and lint, without blocking airflow. It’s the perfect balance for homes that want clean air and an efficient HVAC system.

2️⃣ How often should I replace my 18x24x1 MERV 8 air filter?

Most homes should replace their filters every 1–3 months, depending on usage, pets, and allergies. If you have pets or allergies, check it monthly to maintain optimal air quality.

3️⃣ Will a MERV 8 filter reduce my energy bills?

Yes! A clean, quality filter helps your HVAC system run efficiently. According to the U.S. Department of Energy, replacing a dirty filter can cut your AC’s energy use by 5%–15%.

4️⃣ Are Filterbuy filters made in the USA?

Absolutely. Every Filterbuy filter is proudly made in the USA using high-quality, eco-friendly materials and tested for consistent performance.

5️⃣ Why buy from Filterbuy instead of a big-box store?

Filterbuy offers direct-to-door delivery, custom sizes, bulk packs, and auto-delivery — plus trusted quality you won’t always find on store shelves. We stand by our filters with real testing and homeowner feedback.