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Actual Size: 11.88x29.88x0.75"
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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: 11.88x29.88x0.75"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
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
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: 11.88x29.88x0.75" in → 12x30x1 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 | 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 |
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.
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.”
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.
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.
Replacing filters can cut energy use by up to 15%.
Our customers often report noticeable drops in utility costs.
🔗 Energy.gov: Filter Maintenance
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.
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)
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.
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.
✔️ Trust Filterbuy.
✔️ Get cleaner air.
✔️ Protect what matters most.
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.
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.
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.
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.
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.
