11.25x19.25x1 MERV 8 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 8 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 8 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 8 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
- Actual air filter size: 11.25x19.25x0.75
- 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 11.25x19.25x1 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 8 HVAC & Furnace Air Filters for Home from Filterbuy
At Filterbuy.com, we know that not all air filters are created equal—especially when it comes to hard-to-find sizes like 11.25x19.25x1. That’s why we custom-build each MERV 8 HVAC and furnace filter in our Alabama facility using high-grade materials trusted by thousands of homeowners across the country. Based on years of customer feedback and in-house performance testing, we’ve optimized this filter to capture common household pollutants—like dust, pet dander, and mold spores—without restricting airflow. If you’ve been settling for a “close-enough” size, it’s time to experience the difference a true-fit filter can make.
TL;DR Quick Answers
Buy the Best 11.25x19.25x1 MERV 8 HVAC & Furnace Air Filters for Home
For most homes, the best 11.25x19.25x1 MERV 8 air filter strikes a smart balance between airflow and filtration—capturing dust, pollen, and pet dander without overworking your HVAC system. Look for high-quality, pleated filters with sturdy frames and consistent MERV ratings to ensure reliable performance. For optimal indoor air quality and system efficiency, replace your filter every 60–90 days, or more frequently if you have pets or allergies.
Top Takeaways
Exact Fit – Custom 11.25x19.25x1 size ensures proper airflow and no air bypass.
MERV 8 Protection – Captures 70%+ of dust, pollen, and mold. Great for most homes.
🇺🇸 Made in the USA – Built in Alabama with durable, high-quality materials.
Energy Efficient – Strong performance with <1% impact on energy use.
Fast, Free Shipping – Order directly from Filterbuy.com with auto-delivery options.
When it comes to maintaining a healthier home environment, choosing the right air filter is key—especially in unique sizes like 11.25x19.25x1. Filterbuy’s MERV 8 HVAC and furnace air filters are engineered to capture 90% of airborne particles like dust, pollen, lint, and mold spores, making them ideal for everyday residential use.
Unlike generic, one-size-fits-most options, these filters are precision-cut for a snug fit that ensures proper airflow and optimal system efficiency. Manufactured in the USA with recyclable materials and high-quality pleated media, they’re built to last up to 3 months without sacrificing performance.
Whether you’re replacing a specialty filter or upgrading your air quality, Filterbuy delivers dependable filtration, fast shipping, and peace of mind—right to your door.
“We’ve seen firsthand how overlooked filter sizes like 11.25x19.25x1 can compromise HVAC performance and indoor air quality. That’s why we don’t believe in one-size-fits-all solutions. Every Filterbuy filter is custom-built in our U.S. facility using materials we’ve tested for efficiency, durability, and airflow. Our mission is simple—give homeowners a filter that fits right, performs better, and lasts longer.”
Key Stats That Back Our Filters
We’ve built and tested thousands of custom 11.25x19.25x1 MERV 8 filters at Filterbuy. Here’s why they work—and why they matter:
1. MERV 8 = Proven Filtration Performance
Removes 70%+ of particles 3.0–10.0 microns (dust, pollen, dander).
EPA confirms MERV 8 filters are ideal for standard home use.
Balanced for airflow and long-lasting efficiency.
2. Indoor Air Quality Affects You Daily
90% of your time is spent indoors (per the American Lung Association).
Indoor pollutants can trigger allergies, asthma, and fatigue.
Real customers with pets and sensitivities report cleaner air fast.
3. High Efficiency, Low Energy Impact
MERV 8–13 filters add less than 1% to energy costs.
Verified by Lawrence Berkeley National Lab + our in-house testing.
Why This Matters
Each filter is made in the USA with premium materials.
We specialize in hard-to-find sizes like 11.25x19.25x1.
Customers see less dust, improved breathing, and longer system life.
Final Thought & Expert Opinion
Finding the right air filter isn’t just about size—it’s about performance, protection, and peace of mind.
Why It Matters
Correct fit = better airflow + better filtration.
MERV 8 filters trap up to 70% of common household pollutants.
A poor fit leads to leaks, energy waste, and reduced protection.
What We’ve Learned at Filterbuy
Many homeowners settle for “close enough” filters—not ideal.
We’ve custom-built thousands of 11.25x19.25x1 filters to solve this.
Real-world feedback has helped us refine fit, durability, and performance.
What You Can Expect
Precision fit for your system.
Cleaner air and less dust.
Hassle-free delivery of USA-made quality.
Next Steps: Breathe Better, Starting Now
Follow these simple steps to get the best fit and filtration for your home:
1. Confirm Your Size
Make sure your system uses 11.25x19.25x1 filters.
Measure to double-check for an exact fit.
2. Choose MERV 8
Traps dust, pollen, pet dander, and mold.
Great for most homes without restricting airflow.
Select your quantity (single or multi-pack).
Choose one-time or auto-delivery.
Enjoy fast, free shipping on every order.
4. Install Easily
No tools needed—just slide it in.
Labeled clearly for hassle-free setup.
5. Replace Every 90 Days
More often, if you have pets or allergies.
Or use our Auto-Delivery to stay on schedule.
Click or tap here to order now.
Get Your 11.25x19.25x1 MERV 8 Filter »
Frequently Asked Questions
1. What makes Filterbuy’s 11.25x19.25x1 MERV 8 filter different?
Filterbuy custom-builds this exact size for a precise fit—no air leaks, no guesswork. It's made in the USA with high-quality pleated media that captures over 70% of dust, pollen, and other airborne particles common in homes.
2. Is MERV 8 the right rating for my home?
Yes—MERV 8 is ideal for most households. It balances effective filtration with proper airflow, making it a reliable choice for trapping dust, pet dander, mold spores, and lint without stressing your HVAC system.
3. How often should I replace this filter?
Replace it every 90 days under normal conditions. If you have pets, allergies, or run your system often, we recommend changing it every 60 days for optimal air quality.
4. Can I use a filter that’s “close enough” in size?
We don’t recommend it. A filter that’s even slightly off in size can cause air to bypass the media, reducing filtration efficiency and potentially damaging your system. Always use an exact match like our 11.25x19.25x1 filter.
5. How quickly will my order ship?
Most orders ship within 24 hours and include free standard shipping. We also offer Auto-Delivery so you never forget a filter replacement again.
Take the Next Step Toward Cleaner, Healthier Air
Upgrade your home’s air quality today with the best 11.25x19.25x1 MERV 8 HVAC and furnace air filters designed for reliable performance and consistent airflow. Shop now to breathe easier, protect your system, and keep your indoor environment fresh year-round.