9x30x1 MERV 11 Pleated Air Filter
Actual Size: 8.75x29.75x0.75
Free Delivery 
Factory-Direct Low Prices, Made in the USA
Hassle-Free Returns & Free Exchanges
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
9x30x1 MERV 11 Pleated Air Filter
Actual Size: 8.75x29.75x0.75
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
9x30x1 MERV 11 Pleated Air Filter
Actual Size: 8.75x29.75x0.75
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 9x30x1 MERV 11 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
- Actual air filter size: 8.75x29.75x0.75
- 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 9x30x1 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., 9x30x1).
- 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., 8.75x29.75x0.75 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: 8.75x29.75x0.75 in → 9x30x1 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 | 9 x 30 x 1 inches |
| Actual Size | 8.75 x 29.75 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 9x30x1 MERV 11 HVAC & Furnace Air Filters for Home from Filterbuy.com
Tired of air filters that just don’t perform? At Filterbuy.com, we’ve spent years perfecting the 9x30x1 MERV 11 HVAC & furnace air filter to deliver exceptional indoor air quality without restricting airflow. Based on direct feedback from thousands of homeowners and HVAC professionals, we engineered our filters to strike the optimal balance—capturing up to 95% of airborne particles like dust, pet dander, and pollen, while protecting your system’s efficiency. Unlike generic filters, ours are proudly made in the USA with high-grade synthetic media and durable frames built to last. If you’re serious about improving the air your family breathes, this is the filter trusted by those who know air quality best.
Top Takeaways
Captures 95% of airborne particles — great for dust, pollen, and pet dander.
Made in the USA — high-quality materials built to last.
EPA-backed performance — strong filtration without airflow loss.
Easy to install — available in convenient multi-packs.
Trusted nationwide — by homeowners and HVAC pros alike.
Why Choose Filterbuy’s 9x30x1 MERV 11 HVAC & Furnace Air Filters?
The 9x30x1 MERV 11 HVAC & furnace air filter of Filterbuy.com is one of the most suitable when it comes to the maintenance of a healthier home environment. Capturing 95 percent of airborne particles such as dust, pollen, mold spores, pet dander, etc, this high-efficiency filter will help to reduce allergens and enhance the quality of indoor air without reducing airflow.
Our filters are made of industrial grade materials in the USA and incorporate pleated synthetic media to increase the life of the filter and reinforced frames to eliminate warping. MERV 11 has the best rating to use in homes that require an upgrade to the normal filters, particularly the one in homes with pets and allergies or high dust contents.
These filters are convenient to install and have affordable prices, yet they can serve you a long time and secure your HVAC system. Buy from Filterbuy.com and feel the difference in quality that is trusted by both homeowners and professionals.
“After years of working closely with HVAC professionals and listening to real homeowners, we developed our 9x30x1 MERV 11 filter to meet the exact needs of families who care about air quality. It’s not just about trapping particles—it’s about protecting your home’s health and your system’s efficiency. That’s the Filterbuy standard.”
Supporting Statistics with Real-World Impact
Filterbuy designs filters based on proven performance and real homeowner feedback. Here’s what sets our 9x30x1 MERV 11 filters apart:
1. Traps More Harmful Particles
Captures up to 85% of particles sized 3.0–10 microns (e.g., dust, mold, pollen)
Captures over 65% of particles sized 1.0–3.0 microns (e.g., fine dust, smoke)
Source: EPA.gov – MERV Ratings
2. Filters Ultra-Fine Particles Too
Removes up to 20% of particles between 0.3–1.0 microns
These include allergens like pet dander and fine combustion particles
Source: EPA Filtration Bulletin
3. Backed by Indoor Air Quality Experts
MERV 11 filters meet EPA Indoor airPLUS standards for healthier indoor air
Helps reduce allergen exposure and HVAC strain
Source: EPA Indoor airPLUS
✅ What we’ve seen: Homes with pets, allergy sufferers, and dusty environments benefit significantly from MERV 11 filters.
Final Thought & Expert Opinion
Why it matters:
Clean indoor air isn’t a luxury—it’s a necessity. And your filter choice plays a major role in that.
What Makes Filterbuy’s 9x30x1 MERV 11 Stand Out:
Balances filtration power with efficient airflow
Traps dust, pollen, pet dander, and fine particles effectively
Built in the USA with durable, high-quality materials
Who It’s For:
Homes with allergy sufferers
Pet owners dealing with dander
Anyone tired of dust buildup
Based on First-Hand Experience:
We’ve worked with thousands of customers and HVAC experts. Time and time again, MERV 11 filters prove to be the smart, reliable choice for better air and system performance.
Our opinion:
If you want premium air quality without overpaying, Filterbuy’s MERV 11 is the filter to trust. Long-lasting, effective, and tested in real homes—just like yours.
Next Steps
Follow these simple steps to upgrade your home’s air quality:
1. Pick Your Pack Size
Choose single or multi-pack options.
2. Check Your Filter Size
Confirm your system uses 9x30x1 filters.
3. Order at Filterbuy.com
Fast shipping. Secure checkout. Made in the USA.
4. Set a Reminder
Replace every 3 months, or more often for homes with pets or allergies.
5. Explore More Options
Need other sizes or MERV ratings? We've got you covered.
Frequently Asked Questions
1. What does MERV 11 mean on a 9x30x1 air filter?
MERV 11 is a rating that indicates the filter’s ability to trap particles. It captures 65–95% of particles as small as 1.0 microns, including pollen, pet dander, mold spores, and fine dust—ideal for households needing cleaner air without compromising airflow.
2. How often should I replace a 9x30x1 MERV 11 filter?
For best results, replace every 90 days. If you have pets, allergies, or live in a dusty environment, consider changing it every 60 days or as needed based on air quality.
3. Is a 9x30x1 MERV 11 filter safe for my HVAC system?
Yes. MERV 11 is a balanced choice that offers strong filtration without restricting airflow in most residential HVAC systems. Always check your manufacturer’s recommendations to confirm compatibility.
4. What’s the difference between MERV 8, 11, and 13?
MERV 8: Basic protection (larger particles like dust and lint)
MERV 11: Advanced filtration (allergens, pet dander, mold spores)
MERV 13: Hospital-grade filtration (bacteria, smoke, virus carriers)MERV 11 is ideal for most homes seeking better indoor air quality.
5. Where can I buy a 9x30x1 MERV 11 filter online?
You can order directly from Filterbuy.com for high-quality, USA-made filters with fast shipping and reliable customer support.