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Actual Size: 9.75x23.75x1"
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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: 9.75x23.75x1"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 9.75x23.75x1"
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: 9.75x23.75x1" in → 9.75x23.75x1 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 | 9.75 x 23.75 x 1 inches |
| Actual Size | 9.75 x 23.75 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 |
At Filterbuy.com, we’ve spent years perfecting the air filter to meet real-life needs—because we use them in our own homes too. Our 9.75x23.75x1 MERV 13 HVAC and furnace air filters aren’t just built to spec—they’re engineered with insight from decades of experience in American manufacturing and air quality innovation. Each filter is rigorously tested to capture up to 98% of airborne particles, providing advanced protection against allergens, smoke, and microscopic irritants. When you choose Filterbuy, you're not just replacing a filter—you’re investing in cleaner air, long-term HVAC efficiency, and filters made by people who truly understand what indoor comfort means.
Traps 98% of dust, pollen, smoke, and bacteria.
Meets CDC & EPA recommendations for clean air.
Made in the USA with durable, pleated design.
Backed by real customer results and testing.
Easy to install, order, and set up auto-delivery.
The 9.75x23.75x1 MERV 13 air filter of Filterbuy.com is a high-quality option to those homeowners who require a cleaner and healthier indoor environment. This high efficiency filter fits standard HVAC and furnace systems and traps 98 percent of airborne particles, such as dust, pollen, mold spores, pet dander, smoke and bacteria.
Designed in the USA using an electrostatically charged, pleated, synthetic media and strengthened frames of a durable beverage board, these filters are more efficient in airflow and service life than their fiberglass counterparts. MERV 13 is hospital-grade air quality, and thus it is a perfect choice when it comes to allergy sufferers or households that require additional protection.
Filterbuy 9.75x23.75x1 filters are easy to put in and are fast to have delivered to your door to keep your HVAC system running at its best and your indoor air quality at its best.
“We design our 9.75x23.75x1 MERV 13 filters with the same care we put into protecting our own families’ homes. Years of in-house testing and customer feedback have shown us that real filtration performance means more than just trapping particles—it means building filters that last, support your HVAC system, and genuinely improve your air quality. That’s why every Filterbuy product is engineered, tested, and manufactured here in the USA—by people who know clean air starts at home.”
Here’s how our MERV 13 filters perform—proven by research and confirmed through hands-on experience at Filterbuy:
MERV 13 filters trap:
≥50% of particles 0.3–1.0 µm
≥85% of particles 1–3 µm
Source: ASHRAE.org
Our take: We've tested this in-house and consistently match or exceed those levels using pleated electrostatic media.
MERV 13+ is advised to reduce airborne virus transmission.
Trusted for schools, offices, and homes.
Our insight: During peak flu seasons, many customers noticed fewer symptoms after switching to our MERV 13 filters.
High-efficiency filters like MERV 13–16 dramatically reduce pollutants.
Ideal for allergy relief and clean air maintenance.
Source: AirNow.gov
Our experience: Customers report visibly less dust and cleaner vents after upgrading from basic filters.
Choosing the right air filter isn’t just about fit—it’s about impact. Here’s why the 9.75x23.75x1 MERV 13 filter stands out:
Engineered with Purpose
Built from years of testing and customer insight.
Designed to exceed performance—not just meet specs.
What We’ve Seen First-Hand
Cleaner vents and visibly less dust.
Fewer allergy symptoms reported by users.
Quieter HVAC operation and longer system life.
Why We Trust It Ourselves
Every Filterbuy MERV 13 filter is made in the USA.
We use these same filters in our homes and workspaces.
Consistent performance backed by both lab and real-life results.
Bottom line: If you're serious about air quality, this filter delivers. It's not just about what it blocks—it's about what you and your family can breathe freely.
Improve your indoor air in just a few clicks. Here's how to get started:
1. Select Your Quantity
Choose how many filters you need.
Tip: Replace every 90 days for best performance.
2. Add to Cart & Checkout
Click “Add to Cart.”
Follow the secure checkout process.
Enjoy fast, free shipping on most orders.
3. Install with Ease
Swap out your old filter in minutes.
No tools or hassle needed.
4. Set a Reminder or Subscribe
Mark your calendar for the next change.
Or sign up for auto-delivery to stay on schedule.
5. Browse More Sizes
Need filters for other units?
Explore our full selection on Filterbuy.com.
Breathe cleaner, live better—start now with Filterbuy.
MERV 13 is a high-efficiency rating that indicates the filter can trap up to 98% of particles as small as 0.3 microns—like pollen, dust, pet dander, smoke, and some bacteria.
Replace every 90 days under normal conditions. If you have pets, allergies, or live in a high-dust area, check and replace every 60 days for optimal performance.
Yes, most modern residential HVAC systems can handle MERV 13 filters without issue. They balance superior filtration with sufficient airflow. Check your system’s manual to confirm compatibility.
This custom size ensures a precise fit for certain HVAC systems, preventing air bypass and maximizing filter effectiveness. Always use the exact size recommended by your unit’s manufacturer.
Absolutely. MERV 13 filters capture fine allergens like mold spores, pollen, and dust mites—making them an excellent choice for allergy and asthma relief.
