20x20x1 MERV 13 Pleated Air Filter
Actual Size: 19.5x19.5x0.75
Free Delivery 
Factory-Direct Low Prices, Made in the USA
Hassle-Free Returns & Free Exchanges
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
20x20x1 MERV 13 Pleated Air Filter
Actual Size: 19.5x19.5x0.75
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
20x20x1 MERV 13 Pleated Air Filter
Actual Size: 19.5x19.5x0.75
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 20x20x1 MERV 13 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
- Actual air filter size: 19.5x19.5x0.75
- MERV 13 synthetic media (comparable with MPR 1500/1900 and FPR 10) offers the best protection from dust, pollen, pet dander, mold, smog, bacteria, and virus carrying particles by trapping 98% 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 20x20x1 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., 20x20x1).
- 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., 19.5x19.5x0.75 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: 19.5x19.5x0.75 in → 20x20x1 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
ODOR ELIMINATOR
Comparable to:FPR: 10
MPR: 1900-2800
Dust & DebrisDust Mites & ParticlesPollenMoldLintDanderSmoke & Smog
Odors
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
ODOR ELIMINATOR
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 | 20 x 20 x 1 inches |
| Actual Size | 19.5 x 19.5 x 0.75 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 |
Buy the Best 20x20x1 MERV 13 pleated HVAC & Furnace Air Filters for Home
Trusted by Families, Built by Experts — Discover the Filter That Does More Than Just Fit
When it comes to protecting your home’s air, not all 20x20x1 filters are created equal. At Filterbuy, we don’t just sell filters—we manufacture them right here in the USA using precision pleating and advanced MERV 13 filtration technology tested against real-world contaminants like wildfire smoke, pet dander, and airborne bacteria. What makes ours different? We design each filter with tightly woven synthetic media, ensuring maximum airflow without compromising on capture efficiency—a detail many mass-market brands overlook.
Our 20x20x1 MERV 13 pleated HVAC & furnace filters are the result of years of direct feedback from HVAC professionals and homeowners, combined with in-house R&D that prioritizes what matters most: clean air, energy efficiency, and a fit that never fails. This isn’t just a filter—it’s a performance upgrade for your entire air system, made by a team that lives and breathes air quality every day.
Top Takeaways
Captures Up to 98% of Airborne Pollutants
Filters allergens, smoke, bacteria, and viruses.
Made in the USA
Tested for Real-World Conditions
Based on customer feedback and HVAC expert input.
Boosts Air Quality and HVAC Efficiency
Great for families with health sensitivities.
Easy to Install and Replace
Simple upgrade with long-term benefits.
Filterbuy’s 20x20x1 MERV 13 pleated filters offer a robust first line of defense against harmful airborne particles when indoor air quality is really important. These filters are made to fit most home HVAC and furnace systems without any hassle and go beyond standard options by capturing up to 98% of the airborne pollutants such as pollen, dust, mold spores, bacteria, smoke, and even virus carriers.
Unlike many off-the-shelf filters, specifically ours are made in the USA with high-capacity pleated synthetic media, which not only allows for better airflow but also extends the lifetime. This means that you will change your filter fewer times, enjoy better HVAC performance, and have cleaner air constantly throughout your home.
Our MERV 13 filters, which are supported by Filterbuy’s years of experience in direct manufacturing and trusted by HVAC professionals all over the country, are the best choice for homeowners who are determined to have clean air, efficient system, and reliability without compromising.
“After years of working directly with homeowners, HVAC technicians, and filtration engineers, we’ve fine-tuned our 20x20x1 MERV 13 filters to strike the perfect balance between high-efficiency capture and optimal airflow. These filters aren’t just built to meet standards—they’re built from real-world feedback, lab-tested performance, and a deep understanding of what homes need to breathe cleaner, safer air.”
Supporting Statistics: Why MERV 13 Filters Make a Measurable Difference
Our MERV 13 filters are designed with real indoor air challenges in mind, validated by trusted research and what we see every day from customers across the country.
1. Indoor Air is 2–5x More Polluted Than Outdoor Air
EPA reports that most Americans spend 90% of their time indoors.
Air indoors can carry more dust, allergens, and chemicals than outside.
Our customers often tell us they didn’t realize how poor their air was until they upgraded. Source: EPA Indoor Air Quality
2. MERV 13 Captures Up to 75% of 0.3–1.0 Micron Particles
Includes smoke, fine dust, bacteria, and virus carriers.
We test our filters in-house with real contaminants like wildfire smoke.
Homeowners and HVAC pros see noticeable improvements in just days. Source: ASHRAE MERV Ratings
3. Fine Particle Pollution = Major Health Risk
Linked to asthma, heart disease, and early death.
Especially harmful for kids, seniors, and people with chronic conditions.
Families tell us our filters bring peace of mind and cleaner air fast. Source: American Lung Association
These aren’t just numbers—they reflect the air quality challenges real people face. That’s why we build every Filterbuy MERV 13 filter to perform under real-world conditions, not just in the lab.
Final Thought & Opinion: Why Choosing the Right Filter Matters More Than You Think
Choosing a filter isn’t just about HVAC maintenance—it’s about protecting the air your family breathes every day.
Here’s what we’ve learned firsthand at Filterbuy:
Many homeowners don’t realize the impact their filter has on health and comfort until they upgrade.
A MERV 13 filter is more than just a spec—it’s a proactive investment in clean air and system efficiency.
Customers regularly tell us they feel the difference almost immediately—less dust, fewer allergy symptoms, cleaner airflow.
Why our MERV 13 filters stand out:
Engineered from real-world experience—not just lab specs.
Tested against wildfire smoke, pet dander, and bacteria, not just textbook particles.
Built with purpose—every design decision reflects feedback from families and HVAC pros alike.
Our opinion? A high-quality filter should be part of every home's health strategy. When you install the right filter, you don’t just maintain your system—you upgrade your environment.
That’s not just marketing—it’s what we hear every day from people who made the switch and won’t go back.
Next Steps: How to Get Started
Follow these quick steps to upgrade your air quality today:
1. Check Your Filter Size
Look for “20x20x1” on your current filter or HVAC manual.
2. Choose Your Quantity
Most homes need a new filter every 2–3 months.
Consider buying a multi-pack to stay stocked.
3. Order Online
Add to cart and checkout at Filterbuy.com.
Fast shipping—direct from our U.S. factory.
4. Set a Reminder
Use a calendar or sign up for our email reminders.
Regular changes = better air and longer HVAC life.
5. Install & Breathe Easy
Slide it in and enjoy cleaner, fresher air within days.
Need help deciding?
Contact our support team—we’re ready to help.
Frequently Asked Questions
What makes a MERV 13 filter better than lower-rated filters?
MERV 13 filters offer superior filtration by capturing smaller particles like smoke, bacteria, and virus carriers—something lower-rated filters like MERV 8 or MERV 11 typically miss. This makes them ideal for improving indoor air quality, especially in homes with allergy sufferers, pets, or health-sensitive individuals.
Will a MERV 13 filter restrict airflow in my HVAC system?
Not when it's well-designed. Filterbuy’s 20x20x1 MERV 13 filters use high-efficiency synthetic media that maintains strong airflow while trapping fine particles. We optimize our pleat count and construction to ensure performance without stressing your HVAC system.
How often should I replace my 20x20x1 MERV 13 filter?
Typically, every 2–3 months for most households. However, if you have pets, live in a high-pollen area, or have allergy concerns, monthly replacement is recommended. Regular changes help maintain clean air and system efficiency.
Is a 20x20x1 MERV 13 filter safe to use in any home HVAC system?
Yes, most modern residential systems can handle MERV 13 filters. If your system is older or you’re unsure, check with your HVAC technician to confirm compatibility. Our filters are designed to fit standard units without modifications.
Why choose Filterbuy over other brands?
Filterbuy filters are made in the USA and built from years of direct experience with homeowners and HVAC professionals. We focus on real-world performance, offer fast factory-direct shipping, and design each filter to meet high standards of air quality, durability, and value.