Shop by





Actual Size: 19 1/2" x 24 1/2" x 3/4"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months





Actual Size: 19 1/2" x 24 1/2" x 3/4"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months





Actual Size: 19 1/2" x 24 1/2" x 3/4"
RESIDENTIAL 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: 19 1/2" x 24 1/2" x 3/4" in → 20x25x1 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 & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Smoke & Smog
Comparable to:FPR: 10
MPR: 1900-2800
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Smoke & Smog
Bacteria
Comparable to:FPR: 10
MPR: 1900-2800
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Smoke & Smog
Odors
































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 | 20 x 25 x 1 inches |
| Actual Size | 19 1/2" x 24 1/2" x 3/4" inches |
| Filter Type | Pleated |
| Media | Electrostatically Charged |
| Frame | Beverage Board |
| MERV Ratings Available | 8, 11, 13, Carbon |
| Lifespan | Up to 90 Days |
| Origin | Made in USA |
At Filterbuy.com, we’ve helped thousands of homeowners upgrade their indoor air quality—and we’ve seen firsthand how a premium 20x25x1 MERV 13 pleated filter can make a measurable difference. Designed, manufactured, and quality-tested right here in the USA, our filters are built to capture even the smallest airborne particles, from pollen and pet dander to bacteria and smoke. What sets us apart? Unlike mass-produced generic filters, ours are crafted for long-lasting performance, precise fit, and maximum airflow—based on years of customer feedback and in-house HVAC expertise. If you’re searching for the best filter for your HVAC or furnace system, this page will show you why Filterbuy is the trusted choice for cleaner, healthier air.
MERV 13 = Clean Air Removes up to 98% of dust, allergens, and airborne particles.
Backed by Trusted Sources Meets EPA, CDC, and ASHRAE air quality recommendations.
Made for Performance USA-made with strong frames and high-efficiency media.
Tested & Proven Designed using real feedback from customers and HVAC pros.
Simple to Order & Use Fast checkout, quick shipping, and optional auto-delivery.
The 20x25x1 MERV 13 pleated air filter from Filterbuy is engineered for homeowners who prioritize cleaner, healthier indoor air. With superior filtration performance, it captures 98% of airborne particles—including allergens, mold spores, pet dander, fine dust, bacteria, and smoke—making it ideal for allergy sufferers, pet owners, and anyone concerned with air quality.
What makes Filterbuy’s filters different? Unlike off-the-shelf options, our filters are made in the USA using industrial-grade materials, moisture-resistant frames, and electrostatically charged synthetic media for enhanced particle capture without compromising airflow. We rigorously test each filter for durability and efficiency based on insights from years of customer use and HVAC service feedback.
Each filter is precision-cut to fit standard HVAC and furnace systems, ensuring easy installation and reliable performance. Plus, with fast shipping and subscription options available, you’ll never forget to replace your filter again. If you’re ready to upgrade your home’s air filtration system, Filterbuy makes it easy to buy the best—and breathe the difference.

“Over the years, we’ve seen how the right filter—especially a MERV 13—can drastically improve indoor air quality for families struggling with allergies or poor ventilation. That’s why we designed our 20x25x1 pleated filters to go beyond standard specs—based on direct feedback from HVAC professionals and thousands of homeowners. At Filterbuy, we don’t just manufacture filters—we build solutions we’d trust in our own homes.”
We’ve seen it firsthand: better filters lead to better air. Here’s how national research supports what homeowners using Filterbuy’s 20x25x1 MERV 13 filters already experience.
1. Up to 95% Fewer Airborne Particles
EPA confirms MERV 13–16 filters remove up to 95% of indoor particles
Helps with dust, smoke, pollen, pet dander, and fine allergens
Matches reports from customers who feel fresher air in days. 🔗 EPA Filtration Fact Sheet (PDF)
2. Captures 85%+ of Allergy-Triggering Particles
Eneref Institute reports ≥ 85% capture of 1.0–3.0 micron particles
Includes mold spores, bacteria, fine dust, and pet dander
Aligns with user feedback: less sneezing, cleaner surfaces 🔗 Eneref Institute Report
3. Recommended by CDC, EPA & ASHRAE
Trusted for virus and airborne contaminant control
Official guidance says: MERV 13 or higher for protection.
Many customers upgraded based on these trusted sources. 🔗 EPA HVAC Guidance
Why It Matters
We test our filters for the real world—not just the lab
Built from HVAC pro feedback + homeowner insight
Backed by science, trusted in homes—results you can feel.
We've worked with thousands of homeowners—and one thing is clear: The air filter you choose makes a real difference.
✅ Why the 20x25x1 MERV 13 Filter Stands Out
Cleaner air fast – Many customers report noticeable improvements in days
Less dust, fewer allergies – Reduces buildup and common respiratory triggers.
Efficient and reliable – Built to protect without restricting airflow
“We've had customers tell us their HVAC runs smoother and their allergies ease up fast. We’ve experienced it ourselves.”
🧠 Our Perspective from the Field
MERV 13 isn’t optional anymore – It’s the new standard for healthier indoor living
Real-world tested – Built and validated based on in-home use, not just lab specs.
We use what we sell – Our team installs these filters in our own home.s
The Bottom Line
If you're serious about protecting your air, your health, and your HVAC system, Filterbuy’s 20x25x1 MERV 13 filter is the upgrade worth making.
Cleaner air isn’t just a goal. It’s a guarantee—when you choose the right filter.
1. Pick Your Filter
Confirm your size: 20x25x1
Choose quantity (1, 3, 6, or more)
Tip: Multi-packs = long-term savings
2. Add to Cart & Checkout
Click “Add to Cart”
Enjoy fast, secure checkout at Filterbuy.
Filters ship quickly—made in the US.A.
3. Set & Forget with Auto-Delivery
Get filters shipped on your schedule le.
Save time and never miss a replacement .ent
4. Install with Ease
Use our step-by-step install guide.
Replace every 60–90 days
💡 Need help? Our support team is ready to assist with size, fit, or installation questions.
A 20x25x1 MERV 13 filter captures up to 98% of airborne particles—including dust, pollen, pet dander, mold spores, smoke, and bacteria—making it ideal for improving indoor air quality in residential HVAC and furnace systems.
For best results, replace your MERV 13 filter every 60 to 90 days. Homes with pets, allergies, or high dust levels may benefit from more frequent changes (every 30–60 days).
Not if your system supports it. Filterbuy’s MERV 13 filters are engineered for low resistance and maximum airflow, but always check your HVAC unit’s specifications or consult an HVAC technician before upgrading from lower MERV ratings.
Yes—especially for households with allergy sufferers, pets, or concern over air quality. MERV 13 is recommended by the EPA, CDC, and ASHRAE for its balance of high filtration and airflow compatibility.
Absolutely. All Filterbuy filters are manufactured in the USA, using high-quality materials and strict quality control standards for reliable, long-lasting performance.