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Actual Size: 11.25x23.25x1"
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Factory-Direct Low Prices, Made in the USA
Hassle-Free Returns & Free Exchanges
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 11.25x23.25x1"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 11.25x23.25x1"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
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.
Proudly Made In The USA
Fast, Free Shipping on Every Order
Premium Materials That Go The Distance
85,000+ 5-Star Reviews From Happy Customers
Save Up to 70% Per Filter with Packs
Measure length × width × depth with a tape measure to find the actual size.
Round up each dimension to the nearest whole number to get the nominal size. Example: 11.25x23.25x1" in → 11.25x23.25x1 nominal.
Search by nominal size on our site for the best fit.
If the filter you buy doesn't fit, we'll send you a better size.
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.
Comparable to:FPR: 4-7
MPR: 600-1000
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Comparable to:FPR: 6-9
MPR: 1200-1550
Dust & DebrisDust Mites & ParticlesPollenMoldLintDander
Smoke & Smog
Comparable to:FPR: 10
MPR: 1900-2800
Dust & DebrisDust Mites & ParticlesPollenMoldLintDanderSmoke & Smog
Bacteria
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:
More pleats = more surface area to capture dust and debris, keeping your air cleaner longer.
Pleats are magnetized to attract and trap microscopic particles—like pet dander, pollen, and smoke.
Engineered to resist warping in extreme temperatures and high humidity.
A layer of metal reinforcement keeps pleats evenly spaced and structurally sound—no sagging, even at high airflow.
Assembled with care. Built to perform. Ships fast, free, and reliably from our U.S. facilities.
Turn Off Your HVAC SystemSafety first.
Remove The Old FilterLook for the airflow arrow and make note of the direction.
Slide In Your New FilterArrow should point toward the system (same direction as before).
Turn Your System Back OnAnd enjoy the fresh, clean air.
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:
Efficiency:
High (MERV 8–13) – Traps more particles
Lifespan:
90 days – Long-lasting performance
Air Quality:
Excellent – Cleaner, healthier air
Materials:
Recyclable and durable
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.
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:
For most homes without pets or special air quality concerns. Great for general upkeep and energy efficiency.
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.
For households affected by smoke, pollution, or respiratory conditions, monthly changes ensure maximum protection.
| Nominal Size | 11.25 x 23.25 x 1 inches |
| Actual Size | 11.25 x 23.25 x 1" inches |
| Filter Type | Pleated |
| Media | Electrostatically Charged |
| Frame | Beverage Board |
| MERV Ratings Available | 8, 11, 13 |
| Lifespan | Up to 90 Days |
| Origin | Made in USA |
Tired of generic filters that don’t last or truly protect your air quality? At Filterbuy.com, we’ve engineered our 11.25x23.25x1 MERV 11 HVAC and furnace air filters based on years of direct feedback from homeowners and HVAC technicians alike. Built in our U.S.-based facility with high-capacity pleated media, these filters are designed to outperform standard options—capturing more airborne particles without restricting airflow. We’ve seen firsthand how our filters reduce system strain and help families breathe easier. This isn’t just another filter—it’s a smarter solution backed by real-world results.
MERV 11 Efficiency: Captures up to 95% of dust, pollen, and allergens.
Fits Just Right: 11.25x23.25x1 size ensures proper airflow and system protection.
Designed from Experience: Built with insights from real homes and HVAC pros.
Backed by EPA Data: Supported by trusted research and filtration standards.
Easy & Reliable: Made in the USA, shipped fast, satisfaction guaranteed.
When it comes to maintaining a healthy home environment, the right air filter makes all the difference. Filterbuy’s 11.25x23.25x1 MERV 11 HVAC and furnace air filters are expertly crafted to trap up to 95% of airborne particles—including dust, pollen, pet dander, mold spores, and smoke—making them an ideal choice for households with allergies, pets, or high air quality concerns.
Each filter is made in the USA with durable, high-quality pleated synthetic media that lasts up to 3 months. Our MERV 11 rating offers a perfect balance between superior filtration and optimal airflow, helping your HVAC system run more efficiently while extending its lifespan.
Easy to order and delivered fast, Filterbuy offers the convenience of direct-to-door service and a satisfaction guarantee. With decades of experience in air filtration, we know what works—and we’re proud to deliver it with every filter.
“After working with thousands of homeowners and HVAC professionals, we’ve seen how the right filter can dramatically improve indoor air quality and system efficiency. That’s why we designed our 11.25x23.25x1 MERV 11 filters to offer reliable protection against the particles that most commonly impact home health—without compromising airflow. It’s not just about filtration—it’s about delivering peace of mind with every breath.”
At Filterbuy, our filters are built on real data and first-hand customer experience. Here's what makes our 11.25x23.25x1 MERV 11 filters a smart choice:
Filters up to:
85% of 3–10 micron particles (dust, mold, pet dander)
65% of 1–3 micron particles (pollen, fine debris)
20%+ of 0.3–1 micron particles (smoke, bacteria)
Matches common household concerns we hear every day.
Built for real homes with real air challenges. 🔗 EPA Filtration Factsheet (PDF)
EPA recommends MERV 11+ for healthier indoor air.
Helps reduce respiratory irritants like dust and allergens.
Our filters balance protection and system airflow. 🔗 EPA Indoor Air Quality Bulletin
Poor indoor air can build up fast.
Most people don’t realize it—until they feel the difference.
Customers often tell us: “We didn’t know what we were missing.” 🔗 EPA Guide to Indoor Air Quality
We apply insights from science and the homes we serve.
Every Filterbuy product is backed by data and experience.
Clean air shouldn’t be a luxury—it should be your everyday.
Choosing the right HVAC filter goes beyond dimensions and ratings. It’s about protecting the air your family breathes every day.
Not generic. Our 11.25x23.25x1 MERV 11 filters are built from real customer needs—not off-the-shelf specs.
Backed by experience. We’ve worked with thousands of homeowners and HVAC pros.
Real results. Cleaner air, smoother-running systems, and happier customers—often within days of switching.
Air quality is often overlooked until poor health or dust buildup becomes obvious.
Filters affect everything—from breathing comfort to energy efficiency.
Most filters underperform. Ours are engineered to meet real-world home demands.
If you’re looking for a filter that balances filtration power, airflow, and long-term value, this MERV 11 option is a smart, proven choice.We’ve seen it work. Our customers feel the difference. And that’s what really counts.
Follow these simple steps to get started:
Check Your Filter Size
Confirm it’s 11.25x23.25x1
Look on your current filter or HVAC manual
Decide How Many You Need
Order singles or stock up for the year
Bulk packs = better value
Order at Filterbuy
Fast checkout
Safe, secure delivery
Set a Reminder
Replace every 3 months
Keep airflow strong and air clean
Install & Breathe Better
Enjoy fresher air
Help your system run smoother
MERV 11 filters capture a wide range of airborne particles—including dust, pollen, mold spores, pet dander, and smoke—making them ideal for homes with allergy concerns or high air quality standards.
Yes, if your existing filter is labeled 11.25x23.25x1 (or very close), this size is the right fit. Always measure your old filter or check your system’s manual to confirm.
We recommend replacing it every 90 days under normal conditions. If you have pets, allergies, or high dust levels, check it every 60 days.
Not when properly installed. Filterbuy’s MERV 11 filters are designed to balance efficient filtration with minimal airflow restriction, keeping your HVAC system running smoothly.
Our filters are made in the USA, backed by real customer insights, and built for long-lasting performance. Plus, we offer fast delivery and excellent customer support.
