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11.25x23.25x1 MERV 8 Pleated Air Filter

 

Actual Size: 11.25x23.25x1"

$68.94$11.49/ea
delivery truckFree Delivery
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Standard
Standard

RESIDENTIAL AND/OR COMMERCIAL USE

Change Every 3 Months

About

  • This is a list 11.25x23.25x1 MERV 8 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
  • Actual air filter size: 11.25x23.25x1"
  • 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 11.25x23.25x1 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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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., 11.25x23.25x1).
  • 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., 11.25x23.25x1" 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 11.25"Act 11.25"
Nom 1"Act 1"
Nom 23.25"Act 23.25"
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: 11.25x23.25x1" in → 11.25x23.25x1 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

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 Size11.25 x 23.25 x 1 inches
Actual Size11.25 x 23.25 x 1" inches
Filter TypePleated
MediaElectrostatically Charged
FrameBeverage Board
MERV Ratings Available8, 11, 13
LifespanUp to 90 Days
OriginMade in USA

Buy the Best 11.25x23.25x1 MERV 8 HVAC & Furnace Air Filters for Home from Filterbuy

Tired of air filters that don’t fit quite right or fail to deliver lasting performance? At Filterbuy.com, we’ve crafted our 11.25x23.25x1 MERV 8 HVAC and furnace air filters based on years of direct feedback from homeowners and HVAC professionals who needed a reliable solution for improving indoor air quality. Built in the USA with high-capacity pleated media, our filters are engineered to trap dust, pollen, and debris efficiently—without straining your system. This isn’t just another off-the-shelf filter; it’s the result of firsthand experience, continuous refinement, and a commitment to cleaner, healthier air in every home.

Top Takeaways

Why Choose Our 11.25x23.25x1 MERV 8 Air Filters for Your Home

The 11.25x23.25x1 MERV 8 HVAC and furnace air filter from Filterbuy.com is designed to improve your home’s air quality by capturing 90% of common airborne particles—like dust, pollen, pet dander, and mold spores. Ideal for residential systems, this filter balances strong filtration with low airflow resistance, helping your HVAC system run efficiently while keeping indoor air clean. Made in the USA using high-quality, pleated synthetic media, each filter is built to last up to 3 months. Whether you’re replacing an old filter or stocking up for seasonal maintenance, Filterbuy offers fast, reliable shipping and consistent performance you can trust.

11.25x23.25x1 MERV 8 Furnace & HVAC Air Conditioner Filters

"After years of working directly with homeowners and HVAC technicians, we designed our 11.25x23.25x1 MERV 8 filters to strike the perfect balance between efficiency and airflow. Each filter reflects our commitment to clean, breathable air—built to perform, made to last."

Supporting Statistics at a Glance

Here’s what data—and our real-world experience—show about MERV 8 filters and indoor air quality:

Cleaner Air with MERV 8

Meets EPA Indoor Air Standards

Indoor Air Is Often Worse Than Outdoors

Bottom line: Our MERV 8 filters aren’t just effective—they’re trusted, tested, and backed by data and experience.

Final Thought & Opinion

Here's what we’ve learned through years of firsthand experience—and why this filter stands out:

Why it matters:

If you want a dependable filter that protects your home without slowing down your HVAC system, this one checks every box.

✅ Trusted by professionals

✅ American-made materials

✅ Backed by real-world results

Bottom line: Cleaner air starts with the right filter—and Filterbuy delivers just that.

Next Steps

Follow these quick actions to get started:

1. Confirm your filter size

✔ Make sure 11.25x23.25x1 fits your system.

2. Choose your quantity

✔ Buy in bulk to save and stay prepared.

3. Order on Filterbuy

✔ Fast shipping. Made in the USA. Trusted quality.

4. Set a reminder

✔ Replace every 90 days—or more often with pets/allergies.

5. Enjoy cleaner air

✔ Breathe easier with better indoor air quality.

Frequently Asked Questions

1. What does MERV 8 mean in air filters?

MERV 8 refers to the filter’s efficiency rating, which captures up to 90% of common airborne particles like dust, pollen, mold spores, and pet dander—ideal for residential HVAC systems.

2. How often should I replace my 11.25x23.25x1 MERV 8 filter?

It’s recommended to replace the filter every 90 days. Homes with pets, allergies, or high dust levels may benefit from more frequent replacements—every 30–60 days.

3. Will this size fit my HVAC or furnace system?

Check your current filter or system manual to confirm the 11.25x23.25x1 dimensions. This size is less common but exact-fit filters like this ensure proper airflow and efficiency.

4. Is a MERV 8 filter good for allergies?

Yes. MERV 8 filters trap common allergens such as pollen, lint, and dust mites. For severe allergies, you might consider a MERV 11 or higher—but MERV 8 is a strong starting point for most homes.

5. Are Filterbuy’s 11.25x23.25x1 filters made in the USA?

Absolutely. Filterbuy’s filters are proudly manufactured in the USA using high-quality materials, ensuring consistent performance and fast shipping.

    Best 11.25x23.25x1 MERV 8 Furnace & HVAC Air Conditioner Filters