11.25x19.25x1 MERV 11 Pleated Air Filter
Actual Size: 11.25x19.25x0.75
Free Delivery 
Factory-Direct Low Prices, Made in the USA
Hassle-Free Returns & Free Exchanges
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
11.25x19.25x1 MERV 11 Pleated Air Filter
Actual Size: 11.25x19.25x0.75
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
11.25x19.25x1 MERV 11 Pleated Air Filter
Actual Size: 11.25x19.25x0.75
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
About
- This is a list 11.25x19.25x1 MERV 11 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
- Actual air filter size: 11.25x19.25x0.75
- MERV 11 synthetic media (comparable with MPR 1000/1200 and FPR 7) offers superior protection from dust, pollen, pet dander, mold, smog and more by trapping 95% 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 11.25x19.25x1 Air Filters
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.
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
Things to Know About Filter Sizes
Nominal Size
- The rounded size printed on your filter or HVAC unit (e.g., 11.25x19.25x1).
- Usually whole numbers to make identifying and ordering easier.
- A label for compatibility—not the exact measurement.
Actual Size
- The true, trimmed dimensions of the filter (e.g., 11.25x19.25x0.75 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.
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
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: 11.25x19.25x0.75 in → 11.25x19.25x1 nominal.
Search by nominal size on our site for the best fit.
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
If the filter you buy doesn't fit, we'll send you a better size.
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.
Merv 8
Comparable to:FPR: 4-7
MPR: 600-1000
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Merv 11
Comparable to:FPR: 6-9
MPR: 1200-1550
Dust & DebrisDust Mites & ParticlesPollenMoldLintDander
Smoke & Smog
Merv 13
Comparable to:FPR: 10
MPR: 1900-2800
Dust & DebrisDust Mites & ParticlesPollenMoldLintDanderSmoke & Smog
Bacteria
MERV 8
Comparable to:FPR: 4-7MPR: 600-1000
MERV 11
Comparable to:FPR: 6-9MPR: 1200-1550
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.
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
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.
Never forget to replace your air filter again.
- Save 5% on every order
- Choose Your Delivery Schedule
- Edit, Skip, or Cancel Anytime.
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 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 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:
Every 90 Days
Standard ScheduleFor most homes without pets or special air quality concerns. Great for general upkeep and energy efficiency.
Every 60 Days
If You Have Pets or AllergiesShedding fur, dander, and allergy triggers can build up fast. Changing your filter every two months helps keep the air fresher and symptoms at bay.
Every 30 Days
If You Have Respiratory Concerns or Live in Smog/Wildfire ZonesFor households affected by smoke, pollution, or respiratory conditions, monthly changes ensure maximum protection.
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 Size | 11.25 x 19.25 x 1 inches |
| Actual Size | 11.25 x 19.25 x 0.75 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 |
Buy the Best 11.25x19.25x1 MERV 11 HVAC & Furnace Air Filters for Home from Filterbuy
Tired of generic filters that don’t quite fit or fail to deliver on clean air? At Filterbuy, we custom-build every 11.25x19.25x1 MERV 11 filter to precise specs—no guesswork, no compromises. Backed by years of in-house manufacturing experience and customer feedback, we know what makes a filter truly effective: a perfect fit, durable construction, and proven performance against dust, allergens, and pollutants. This page isn’t just a product listing—it’s your guide to choosing a filter that actually works, straight from the people who make them every day in the USA.
TL;DR Quick Answers
Buy the Best 11.25x19.25x1 MERV 11 HVAC & Furnace Air Filters for Home from Filterbuy
For a precise fit and dependable indoor air quality, Filterbuy’s 11.25x19.25x1 MERV 11 air filters are engineered to capture common household pollutants like dust, pollen, pet dander, and mold spores without restricting airflow. This size is ideal for systems that require a non-standard fit, helping prevent air bypass and maintaining HVAC efficiency. With a strong balance between filtration performance and system protection, these filters are a smart upgrade for homes seeking cleaner air and consistent performance—especially in allergy-prone or high-traffic environments.
Top Takeaways
MERV 11 = Ideal Balance Traps allergens, dust, and dander while keeping airflow strong.
Custom Fit, Made in the USA 11.25x19.25x1 filters built to spec for reliable performance.
Proven Filtration Captures up to 85% of harmful particles (EPA & lab backed).
Real-World Tested Designed using hands-on experience and customer feedback.
Easy to Maintain Fast shipping, auto-reminders, and simple reordering.
Filterbuy’s 11.25x19.25x1 MERV 11 HVAC and furnace air filters are engineered to deliver superior indoor air quality and system performance. Crafted in the USA using high-quality pleated media, these filters capture up to 95% of airborne particles—including pollen, pet dander, dust mites, and mold spores—without restricting airflow.
Designed for residential HVAC systems, our filters help reduce allergy symptoms, protect your equipment from buildup, and maintain energy efficiency. Each filter is custom-cut to ensure a perfect fit, so you get consistent performance with no air bypass or gaps.
Whether you're replacing filters regularly or upgrading to a higher MERV rating, Filterbuy makes it easy to find the right size and order with confidence—fast shipping and dependable quality guaranteed.
“As a U.S.-based manufacturer, we’ve spent years perfecting the fit and filtration of our 11.25x19.25x1 MERV 11 filters. We don’t just sell air filters—we build them to solve real problems our customers face every day, from poor indoor air quality to inefficient HVAC performance. That’s why every filter we ship reflects our commitment to clean air, precision engineering, and trusted reliability.”
Trusted Performance Backed by Data
We’ve built thousands of custom filters and know what really works. Here’s what the numbers—and our experience—say:
1. High Particle Capture (EPA Verified)
Captures ≥65% of particles 1.0–3.0 microns
Captures ≥85% of particles 3.0–10.0 microns
Traps dust, pet dander, pollen, and mold spores
2. Better Air, Better Health
EPA recommends MERV 8+ for improved IAQ
Many customers report fewer allergy symptoms with MERV 11
We’ve seen it firsthand in homes across the U.S.
3. Minimal Energy Impact
MERV 10–13 filters add <1% to HVAC energy use
Our designs preserve airflow while boosting filtration
No noticeable impact on system efficiency
Bottom line: We don’t just meet standards—we live them. Every Filterbuy MERV 11 filter is designed for real-world results you can see and breathe.
Final Thought & Opinion
At Filterbuy, we’ve built, tested, and refined thousands of air filters—and we know what works.
Here’s our take on MERV 11 filters:
1. They strike the perfect balance
Strong particle capture (dust, allergens, mold)
2. They’re built for real homes
Designed based on customer needs and daily use
Reliable even in challenging environments
3. They deliver real value
Help improve air quality without overengineering
Long-lasting, made in the USA, shipped fast
Our opinion?
You don’t need the highest MERV number—you need the right fit for your home. MERV 11 hits that sweet spot. It’s the upgrade that makes a visible difference in comfort and cleanliness.
Bottom line:
Clean air shouldn’t be complicated. With Filterbuy, you get filters made with care, backed by experience, and built to perform. Every time.
Next Steps
Take control of your indoor air quality in just a few easy steps:
1. Confirm Your Size
Make sure you need 11.25x19.25x1 filters.
Need help? See our sizing guide
2. Stick with MERV 11
Great for homes with pets, dust, or allergy concerns.
Balances airflow and filtration efficiency.
3. Place Your Order
Fast, free shipping from our U.S. facility.
Shop MERV 11 filters now
4. Set a Reminder
Replace every 90 days.
Use calendar alerts or auto-delivery.
5. Explore Other Options
Need a different size or filter type?
Breathe better, live better—start with your next filter today.
Frequently Asked Questions
1. What does MERV 11 mean, and is it right for my home?
MERV 11 filters capture over 85% of airborne particles like dust, pollen, pet dander, and mold spores. It’s ideal for homes with pets, allergies, or those needing enhanced air quality without restricting HVAC airflow.
2. How often should I replace my 11.25x19.25x1 MERV 11 filter?
For optimal performance, replace your filter every 90 days. If you have pets, allergies, or live in a high-dust area, replace it every 60 days.
3. Is 11.25x19.25x1 a standard filter size?
No, it’s a custom size. Filterbuy manufactures it to exact dimensions for a perfect fit, ensuring no air bypass and maximum filtration.
4. Will a MERV 11 filter reduce my HVAC system’s efficiency?
Not at all. Our MERV 11 filters are designed to balance airflow and filtration. Independent studies show energy impact is minimal—less than 1% in most systems.
5. Are Filterbuy filters made in the USA?
Yes. All our filters are proudly manufactured in the USA using high-quality materials to ensure performance, reliability, and fast delivery.
Upgrade Your Air Quality with the Right Fit Today
Take the next step toward cleaner, healthier indoor air with Filterbuy’s 11.25x19.25x1 MERV 11 HVAC and furnace air filters—designed for optimal performance and a precise fit. Shop now to improve airflow, reduce airborne contaminants, and keep your HVAC system running efficiently year-round.