12x30x1 MERV 11 Pleated Air Filter
Actual Size: 11.88x29.88x0.75
Free Delivery 
Factory-Direct Low Prices, Made in the USA
Hassle-Free Returns & Free Exchanges
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
12x30x1 MERV 11 Pleated Air Filter
Actual Size: 11.88x29.88x0.75
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
12x30x1 MERV 11 Pleated Air Filter
Actual Size: 11.88x29.88x0.75
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 12x30x1 MERV 11 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
- Actual air filter size: 11.88x29.88x0.75
- 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 12x30x1 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., 12x30x1).
- 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., 11.88x29.88x0.75 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: 11.88x29.88x0.75 in → 12x30x1 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 | 12 x 30 x 1 inches |
| Actual Size | 11.88 x 29.88 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 12x30x1 MERV 11 HVAC & Furnace Air Filters for Home
At Filterbuy.com, we know that not all air filters are created equal, because we’ve built ours differently. Our 12x30x1 MERV 11 HVAC and furnace filters are the result of years of hands-on experience, rigorous testing, and direct customer feedback from real homes like yours. We’ve seen firsthand how the right filter can make a noticeable difference in reducing allergens, improving airflow, and extending HVAC system life. That’s why every Filterbuy filter is proudly made in the USA using high-grade materials that outperform generic alternatives. When you buy from us, you're not just replacing a filter—you’re investing in cleaner air, backed by expertise you can feel with every breath.
Top Takeaways
MERV 11 = Ideal Balance Traps dust, pollen, and pet dander—without restricting airflow.
Designed for Real Homes Built from hands-on experience and customer insights.
Healthier Air, Fewer Symptoms Reduces allergens and improves breathing comfort.
Boosts HVAC Efficiency Saves energy and extends system life with regular changes.
Trusted Quality, USA-Made Manufactured with care, backed by expertise and performance.
When it comes to protecting your home’s air quality, Filterbuy’s 12x30x1 MERV 11 HVAC and furnace air filters offer the perfect balance of powerful filtration and optimal airflow. Engineered to capture up to 95% of airborne particles—including pollen, dust mites, mold spores, pet dander, and smoke—these filters are ideal for households with allergies, pets, or anyone seeking cleaner, healthier air.
Unlike standard filters, our MERV 11 filters are manufactured in the USA using durable, moisture-resistant frames and electrostatically charged synthetic media for maximum particle capture without straining your HVAC system. Each filter is built to last up to 90 days and fits seamlessly into most residential units.
Filterbuy’s commitment to quality means you get a filter that performs as promised, every time. With bulk pricing, fast shipping, and automatic delivery options, maintaining clean indoor air has never been easier or more reliable.
“After years of manufacturing filters and listening to thousands of homeowners, we’ve learned that a well-balanced filter isn’t just about high MERV ratings—it’s about protecting indoor air without overworking your system. That’s why our 12x30x1 MERV 11 filters are engineered to deliver hospital-grade filtration with the efficiency and durability real homes need every day.”
Why MERV 11 Filters Matter – Backed by Research & Real Homes
1. Indoor Air Can Be Dirtier Than You Think
People spend ~90% of their time indoors.
Indoor air is often 2–5x more polluted than outdoor air.
We see this daily in homes with pets, cooking, or closed ventilation.
2. Millions Suffer from Poor Air Quality
26 M+ Americans have asthma, including 4.5M children.
Indoor pollutants are a major trigger.
Our filters help reduce these triggers in real homes every day.
3. Clean Filters Save Energy & Money
Replacing filters can cut energy use by up to 15%.
Our customers often report noticeable drops in utility costs.
🔗 Energy.gov: Filter Maintenance
4. Proven Filtration, Real-Life Performance
MERV 11 traps dust, pollen, mold spores, and pet dander.
Meets EPA standards; ideal for most homes.
MERV 13 is great too, but MERV 11 offers strong performance without system stress.
Final Thought & Expert Opinion
Why It Matters
Choosing an air filter might feel minor, but it makes a major difference. From years of experience at Filterbuy, we’ve seen how better filtration directly impacts:
Health (fewer allergens and irritants)
Comfort (cleaner, fresher indoor air)
Efficiency (lower energy bills, longer HVAC lifespan)
What We’ve Learned
After working with thousands of homeowners, one thing is clear:
Air quality is personal. Every home is different—filters must meet real-world needs.
Balance is key. MERV 11 provides strong filtration and airflow performance.
Consistency matters. Regular replacements make all the difference.
Our Take
We believe your filter should work for your health and your HVAC system, not against it.
That’s why we designed our 12x30x1 MERV 11 filters for optimal performance in real homes.
Backed by testing, built with quality, and proven by results.
In our opinion, it’s the filter that gets it right, without compromise.
Ready to Breathe Easier?
✔️ Trust Filterbuy.
✔️ Get cleaner air.
✔️ Protect what matters most.
Frequently Asked Questions
What does a MERV 11 filter capture?
MERV 11 filters capture up to 95% of airborne particles in the 3–10 micron range. This includes dust, pollen, mold spores, pet dander, smoke, and even some bacteria, making them ideal for allergy sufferers and homes with pets.
How often should I replace a 12x30x1 MERV 11 air filter?
We recommend replacing your filter every 90 days under normal conditions. If you have pets, allergies, or live in a high-pollen area, changing it every 60 days helps maintain peak air quality and system efficiency.
Will a MERV 11 filter restrict airflow in my HVAC system?
No—our 12x30x1 MERV 11 filters are specifically engineered to deliver high filtration without compromising airflow. They strike the right balance for residential systems, unlike some higher MERV ratings that may overburden older or less powerful units.
Is 12x30x1 a standard size, and how do I know if it fits?
Yes, 12x30x1 is a standard nominal size. To ensure a proper fit, check the label on your existing filter or measure the opening in your HVAC or furnace system. Need help? Filterbuy offers custom sizes and support to find your perfect match.
Are Filterbuy filters made in the USA?
Yes! All Filterbuy filters, including the 12x30x1 MERV 11, are proudly manufactured in the USA using high-quality, durable materials. This ensures consistent performance and supports American jobs and craftsmanship.