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Actual Size: 19 3/8" x 23 3/8" x 3/4"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months





Actual Size: 19 3/8" x 23 3/8" x 3/4"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months





Actual Size: 19 3/8" x 23 3/8" 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 3/8" x 23 3/8" x 3/4" in → 20x24x1 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 24 x 1 inches |
| Actual Size | 19 3/8" x 23 3/8" 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, we know that when it comes to clean air, details matter — and we’ve seen firsthand how upgrading to a MERV 13 filter can transform a home’s air quality. Our 20x24x1 MERV 13 HVAC & Furnace Air Filters are built for homeowners who want top-tier protection that goes beyond trapping dust and pollen.
We designed these filters to capture finer particles — like smoke, bacteria, and microscopic allergens — that many standard filters miss. After years of in-house testing and listening to real customer feedback, we make every MERV 13 filter to deliver hospital-level air filtration while keeping your system running smoothly and energy bills under control.
When you buy direct from Filterbuy.com, you’re choosing filters made in the USA by people who trust them in their own homes first — and ship them straight to yours. Breathe easier, live healthier — that’s our promise.
1️⃣ Maximum Protection
MERV 13 traps smoke, bacteria, fine dust, and allergens.
2️⃣ Proven Quality
Made in the USA.
Tested and trusted in our own homes.
3️⃣ Healthier Air
Better for allergies and asthma relief.
4️⃣ Energy Efficient
It can help lower energy bills.
5️⃣ Easy & Reliable
Fast shipping.
Simple install.
Auto-Delivery available.
Filterbuy’s 20x24x1 MERV 13 HVAC & Furnace Air Filters offer our highest level of residential filtration, capturing up to 98% of airborne particles — including fine dust, pollen, pet dander, smoke, and even bacteria. This means noticeably cleaner air for families who want the same peace of mind trusted by hospitals and commercial buildings.
Each filter is made in the USA with durable, moisture-resistant materials that won’t warp or degrade before it’s time to replace. Thanks to our precision design, you get a true-to-size fit that installs easily and keeps your HVAC system running efficiently without airflow restriction.
When you order directly from Filterbuy.com, you skip the middleman — getting factory-direct quality, honest pricing, and fast shipping right to your door. Backed by years of real-world testing and customer feedback, our MERV 13 filters deliver the cleaner, healthier air your family deserves.

“After testing thousands of filters in real homes, we know a MERV 13 can make all the difference — it’s the filter we trust in our own families’ homes to trap the finest particles and keep the air truly clean. At Filterbuy, we build every filter to deliver hospital-grade performance that homeowners can count on every single day.”
At Filterbuy, we know clean air starts with real data and first-hand results. Here’s why a MERV 13 filter matters:
1️⃣ Indoor Air is Dirtier Than You Think
Indoor air can be 2–5 times more polluted than outdoors.
Fine particles build up where standard filters fail.
Our MERV 13 targets these hidden pollutants. (EPA)
2️⃣ Smoke & Fine Particles Are Harmful
Tiny particles can reach deep into your lungs.
They can worsen asthma and heart conditions.
Our filters trap smoke, bacteria, and fine dust. (American Lung Association)
3️⃣ Better Filters Save Energy
A clean system runs more efficiently.
Using quality filters can cut energy use by up to 15%.
You get healthier air and lower bills. (ENERGY STAR)
Our takeaway: We test and build every filter to handle what standard filters can’t — so your family can breathe easier, every day.
When it comes to clean air, here’s what we know first-hand: not all filters protect your family equally.
Why MERV 13?
Blocks tiny particles, smoke, and bacteria.
Delivers hospital-level filtration at home.
Keeps your HVAC system running efficiently.
✅ What Sets Filterbuy Apart?
1️⃣ We test every filter ourselves.
2️⃣ We use them in our own homes first.
3️⃣ We ship them factory-direct to you.
Our Take: If you want air you can trust — and performance you can see — a MERV 13 is the smart choice. We stand behind every filter because we breathe this air too.
Cleaner air. Proven results. Peace of mind — that’s the Filterbuy promise.
Breathe cleaner air in 3 simple steps:
1️⃣ Check Size
Confirm your filter: 20x24x1 MERV 13.
Double-check your old filter or HVAC specs.
2️⃣ Order Online
Click Add to Cart.
Get fast, factory-direct shipping.
Swap your old filter in minutes.
Replace every 90 days.
💡 Tip:
Set up Auto-Delivery.
Save money. Never forget a replacement.
🔗 Next: Order now. Get hospital-level clean air at home with Filterbuy.
MERV 13 is a high-efficiency rating. It traps up to 98% of fine particles, including smoke, bacteria, pollen, and dust — ideal for maximum home air quality.
No. Our 20x24x1 MERV 13 filters are designed to maintain healthy airflow while providing hospital-level filtration. Just replace them on schedule to keep your system running smoothly.
Every 90 days is recommended. If you have pets, allergies, or heavy dust, check every 60 days for peak performance.
Yes! The higher filtration captures smaller allergens and particles that trigger asthma and allergy symptoms, giving you cleaner air to breathe.
You get USA-made filters, tested and trusted in real homes. Fast shipping, factory-direct pricing, and optional Auto-Delivery make it easy to keep your air fresh, without the hassle.