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Actual Size: 11.25x19.25x1"
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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: 11.25x19.25x1"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 11.25x19.25x1"
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: 11.25x19.25x1" in → 11.25x19.25x1 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 19.25 x 1 inches |
| Actual Size | 11.25 x 19.25 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 |
Struggling to find a reliable 11.25x19.25x1 MERV 13 air filter that truly performs? At Filterbuy.com, we understand that not all filters are created equal. That’s why we engineered ours using insights from years of working directly with homeowners and HVAC professionals who demand both top-tier filtration and consistent sizing. Our MERV 13 filters are crafted in the U.S. with electrostatically charged, pleated media designed to capture everything from pollen to airborne bacteria—without compromising airflow. We've tested them in real homes and know firsthand the difference they make in air quality, system efficiency, and even allergy relief. When you choose Filterbuy, you're not just buying a filter—you’re investing in healthier living, backed by experience.
Powerful Filtration Captures up to 98% of dust, allergens, and airborne particles.
Backed by Research Trusted by the EPA, CDC, and tested in real homes.
Precision Fit Exact 11.25x19.25x1 sizing with durable, USA-made materials.
Health-Focused Great for homes with pets, allergies, or high air quality needs.
Easy & Reliable Fast shipping and auto-delivery options available.
When it comes to protecting your home’s air quality, Filterbuy’s 11.25x19.25x1 MERV 13 HVAC and furnace air filters deliver premium performance you can trust. Specially engineered to trap up to 98% of airborne particles—including allergens, pet dander, mold spores, and fine dust—these filters are ideal for households seeking cleaner, healthier indoor air.
Each filter is proudly made in the USA using high-quality, pleated synthetic media that maintains airflow while extending the lifespan of your HVAC system. The precise 11.25x19.25x1 sizing ensures a snug fit for optimal filtration efficiency, and our durable frame construction resists moisture and warping over time.
Whether you’re replacing a worn-out filter or upgrading to MERV 13 for advanced protection, Filterbuy makes it easy. With fast shipping and bulk-order options, you get convenience, reliability, and cleaner air—delivered right to your door.
"As a family-owned business with decades in air filtration, we've seen firsthand how the right MERV 13 filter—like our 11.25x19.25x1 model—can drastically improve a home's air quality. We designed this filter based on real feedback from homeowners and HVAC pros who needed both precision sizing and high-efficiency performance. It's more than a filter—it's peace of mind you can breathe in."
Our experience at Filterbuy—and national research—shows MERV 13 filters make a real difference. Here’s how:
1. Particle Capture Efficiency
Captures up to 50% of particles as small as 0.3 microns
Removes 85% of particles 1–3 microns (e.g., pet dander, bacteria)
Blocks 90%+ of particles 3–10 microns (like dust, pollen, mold)
Source: Lawrence Berkeley National Lab
Up to 95% reduction in airborne particles vs. low-efficiency filters
Ideal for allergy sufferers, pet owners, and high-traffic homes
Source: EPA / AirNow
3. Trusted Health Recommendations
CDC & OSHA recommend MERV 13 or higher for improved air cleanliness
Especially critical in homes with limited ventilation or high occupancy
Source: CDC.gov
We’ve tested our 11.25x19.25x1 MERV 13 filters in real homes, and the results align with the science—cleaner air, better protection, and peace of mind.
Choosing the right air filter matters—and from what we’ve seen at Filterbuy, MERV 13 is a game changer for home air quality.
Why It Stands Out:
Tested in real homes with measurable improvement in air freshness and comfort.
Recommended by professionals for its balance of filtration and airflow.
Backed by science and aligned with trusted health guidelines.
What Our Experience Shows:
1. Cleaner air = healthier living
Customers report fewer allergies, less dust buildup, and a noticeable difference in air quality.
2. An upgrade worth making
Investing in a high-efficiency filter like our 11.25x19.25x1 MERV 13 pays off in HVAC performance and overall wellness.
3. We stand behind every filter. Built with care, tested for consistency, and shipped fast from our U.S. facility.
Bottom Line:
If you're serious about indoor air quality, this isn't just a replacement filter—it's a smart step toward cleaner, healthier living. We've seen the difference, and we're confident you will too.
Take action now to improve your home's air quality:
1. Check Your Size
Make sure 11.25x19.25x1 is the right filter for your system.
2. Select Quantity
Buy in bulk to save and stay stocked year-round.
3. Place Your Order
Click “Add to Cart” and check out on Filterbuy.com.
4. Set a Reminder
Replace your filter every 3 months.
Add it to your calendar or phone alerts.
5. Browse More Options
Need other sizes or higher MERV ratings?
Explore our full product lineup.
Pro Tip: Sign up for auto-delivery so you never miss a replacement!
MERV 13 (Minimum Efficiency Reporting Value) indicates a high-efficiency filter that captures up to 98% of airborne particles, including dust, pollen, mold, smoke, bacteria, and pet dander—ideal for improving indoor air quality in homes.
While not the most common, 11.25x19.25x1 is a precise size for certain HVAC or furnace systems. Filterbuy manufactures this custom size to ensure a perfect fit and optimal performance.
For best results, replace every 3 months. However, homes with pets, allergies, or high dust may benefit from changing it every 1–2 months.
Not with Filterbuy’s design. Our filters are engineered to maintain proper airflow while maximizing particle capture—protecting your HVAC system and air quality simultaneously.
Yes! Filterbuy offers auto-delivery options so you never forget to change your filter. Just select your frequency during checkout, and we’ll handle the rest.
