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Actual Size: 8x20x1"
Free Delivery 
Factory-Direct Low Prices, Made in the USA
Hassle-Free Returns & Free Exchanges
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 8x20x1"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 8x20x1"
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: 8x20x1" in → 8x20x1 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 | 8 x 20 x 1 inches |
| Actual Size | 8 x 20 x 1" 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’ve spent years refining our 8x20x1 MERV 13 filters based on direct feedback from homeowners, HVAC professionals, and air quality experts. What have we learned? Most filters claim performance, but few deliver on real-world protection. That’s why we designed our MERV 13 filters to trap 98% of airborne particles—including allergens, fine dust, and even virus-carrying droplets—without restricting airflow. Manufactured in our family-run U.S. facilities, every filter reflects what we’ve tested, proven, and trusted in our own homes. The result? Cleaner indoor air, longer HVAC life, and the confidence of filters built by people who truly understand air quality.
1. MERV 13 = Powerful Protection
Captures 90% of allergens, bacteria, smoke, and fine dust.
2. Trusted by Experts—and Us
We use the same filters in our own homes.
3. HVAC-Friendly Design
4. Made in the USA
Fast, free shipping from U.S.-based facilities.
5 . Auto-Delivery Available
Never forget to replace your filter again.
Protecting your home's air is very important, but not all filters can do the job efficiently. Filterbuy’s 8x20x1 MERV 13 HVAC & furnace air filters are top-notch, and they will get rid of the smallest and most dangerous air particles that are going to carry your allergies, such as pollen, mold spores, pet dander, fine dust, smoke, and even bacteria and viruses.
Made in America with high-grade synthetic material, these filters assure the best filtration performance while still being able to provide your HVAC system with sufficient air flow to prevent it from choking. The filters are designed with a durable and moisture-resistant frame, and their pleats create more surface area. Thus, they can perform for 3 months without any sacrifice.
Filterbuy’s MERV 13 filters are recommended by professionals in the HVAC field and have the faith of thousands of families all over the country. They provide a perfect mix of clean air, energy efficiency, and affordability. You can enjoy free, fast delivery and discounts on bulk purchases, and never struggle to improve your air quality again.
“After producing millions of filters for homes across the country, we’ve seen firsthand how poor air quality can impact health and HVAC performance. That’s why we engineered our 8x20x1 MERV 13 filters to strike the right balance—capturing ultra-fine particles like allergens, bacteria, and wildfire smoke, without overloading your system. We don’t just manufacture filters—we use them in our own homes, and we build them to the standard we’d expect for our families.”
Backed by data. Shaped by experience.
We’ve designed our 8x20x1 MERV 13 filters based on real-world testing, customer feedback, and national air quality data. Here’s what drives our product design:
Over 120 million Americans live with unhealthy air.
Pollution from wildfires and smog makes its way indoors—fast.
We’ve seen this firsthand in feedback from families in wildfire zones.
🔗 American Lung Association – State of the Air
Captures up to 90% of particles 1.0–3.0 microns (dust, pollen, bacteria).
Recommended by the EPA for homes concerned about indoor pollutants.
Our filters are lab-tested and optimized for low airflow resistance.
🔗 EPA – Guide to Air Cleaners in the Home
Indoor air can be 2–5x more polluted than outdoor air.
HVAC filters play a key role in reducing daily exposure.
We hear from allergy sufferers who notice immediate improvement.
🔗 EPA – Indoor Air Quality Report
Why We Trust MERV 13—And You Should Too
At Filterbuy, we've built and used millions of filters. Here's what we’ve learned:
MERV 13 filters strike the perfect balance:
✅ Hospital-grade protection
✅ Low airflow resistance
✅ Long-lasting performance
For most homes, 8x20x1 MERV 13 is the ideal choice.
It captures the pollutants that matter—dust, allergens, bacteria, smoke—without overworking your HVAC system.
We use these filters in our own homes because they work. Simple as that.
Clean air isn’t a bonus—it’s a basic need.
Choosing the right filter is one of the easiest ways to take control of your indoor environment.
👉 Bottom line: We believe every household deserves MERV 13-level protection—and we’re proud to make it accessible and reliable.
1. Choose Your Filter Pack
Tip: Buy in bulk to save and reduce reordering.
2. Set Up Auto-Delivery (Optional)
Get filters delivered every 1, 2, or 3 months.
Stay on schedule—no reminders needed.
3. Add to Cart & Checkout
Secure, fast checkout.
Always free shipping from our U.S. facilities.
4. Install with Ease
Filters are labeled with size and airflow direction.
No tools or guesswork required.
5. Enjoy Cleaner Air
Breathe easier knowing you’ve upgraded to hospital-grade filtration.
💬 Need help? Our experts are here to guide you. Just ask!
Yes—MERV 13 (Minimum Efficiency Reporting Value) is a high-efficiency filter level that captures particles as small as 0.3 microns, including pollen, mold, smoke, bacteria, and virus-carrying droplets. It’s safe and recommended for most residential HVAC systems with proper airflow capacity.
Not with Filterbuy filters. Our 8x20x1 MERV 13 filters are engineered to maintain strong airflow while providing maximum filtration. If your system is well-maintained, you’ll get cleaner air without straining the motor.
We recommend replacing your filter every 3 months under normal conditions. If you have pets, allergies, or live in an area with high pollution or smoke, consider replacing it every 1–2 months.
Yes! All of our filters—including the 8x20x1 MERV 13—are proudly manufactured in our Alabama-based facilities using high-quality materials and rigorous quality control.
Absolutely. You can choose auto-delivery at checkout to receive fresh filters every 1, 2, or 3 months, so you’ll never forget a replacement again.
