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Actual Size: 19 1/2" x 19 1/2" x 3/4"
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: 19 1/2" x 19 1/2" x 3/4"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 19 1/2" x 19 1/2" x 3/4"
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: 19 1/2" x 19 1/2" x 3/4" in → 20x20x1 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
Comparable to:FPR: 10
MPR: 1900-2800
Dust & DebrisDust Mites & ParticlesPollenMoldLintDanderSmoke & 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 20 x 1 inches |
| Actual Size | 19 1/2" x 19 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 |
Find a decent price for 20x20x1 MERV 8 air filters. Get the best value for your money with a little knowledge.
Air filters from Filterbuy are easy to find. You don’t need to spend a lot of time and resources finding one.
What is the secret to the best deals? Time your purchases. It's good to buy in bulk and watch out for deals.
Let’s explore how to find great deals without compromising on filter quality.
Look for sales for cheaper prices on Filterbuy 20x20x1 MERV 8 filters.
Buy lots at once to get you a discount. This ensures you always have a Filterbuy 20x20x1 pleated air filter on hand.
Make sure the company is trusted before you buy. Look at what previous customers say and double-check the price.
MERV ratings measure how well air filters block particles. Higher MERV ratings catch smaller particles for better filtration.
MERV 8 filters are great for most homes, trapping allergens like dust and pollen to improve air quality.
Filterbuy top ranked MERV 8 filters trap 90% of airborne particles as small as 3 microns. Ideal for basic and standard residential and commercial use, this filter is designed to last 90 days.
There’s the best time to secure deals on air filters. Your savings may depend on when you choose to buy.
Don’t forget clearance sales! It is much cheaper to buy air filters in bulk orders. End of season sales offers big discounts. Retailers clear out old stock for new inventory. Look for deals on air filters at the end of winter or summer.
However never let the lure of low prices make you settle for substandard quality. Ensure the MERV 8 filter you're purchasing meets your requirements. After all, what's the point of a good deal if the filter doesn't deliver as expected?
20x20x1 pleated air filters from Filterbuy, boost indoor air quality and health while maintaining efficiency for a healthier home.
Here are some benefits:
Better Air Quality: Captures more pollutants for cleaner air.
Better Efficiency: Lasts longer and works more efficiently.
Health Benefits: Blocks dust, mold, and other particles. Reduce allergies and breathing issues.
Cost-Effective: Saves on bills and replacements.
Easy to Maintain: Fewer changes are needed, saving time and effort.
Regular maintenance of Filterbuy 20x20x1 MERV 8 filters maintains their durability and optimizes HVAC system performance, saving money as well as time.
As recommended, replace the filter every 60 to 90 days. But when it comes to households with pets or individuals with allergies may need more frequent replacements.
Always have spare filters available to avoid unexpected issues.
Clean washable filters properly. This avoids mold and mildew, rinse washable filters with warm water and let them fully dry.
Make sure there are no gaps in the filter's fit to maintain effectiveness while avoiding damages.
Filterbuy filters are designed with simplicity and efficiency. This user-friendly approach makes them easy to maintain. This focus on practicality sets Filterbuy among other brands.
Our pleated air filters are 20x more efficient than standard fiberglass filters. These filters have a sturdy beverage board frame that resists humidity and temperatures up to 200°F. These are without warping or weakening.
For top-tier filtration, we use a special synthetic electrostatic media, which is much more effective at capturing particles than the basic cotton media in other filters.
A MERV 8 filter doesn't block airflow in most home HVACs. It's a good balance between cleaning the air and keeping airflow steady. However, if you have an old system or one that's having airflow problems, make sure the filter doesn't make things worse.
Yes. A MERV 8 filter is good for most homes. It can catch big particles like dust, pollen and pet fur. Making the air inside cleaner without making the heating and cooling system work too hard. For most homes a MERV 8 filter cleans the air just fine.
The downside to high MERV filters is that they can restrict airflow. Especially in systems not designed for them. This can cause your HVAC system to work harder. Leading to higher energy costs and potential system strain. It’s important to choose a filter that balances filtration needs with your system’s capacity.
A MERV 8 filter is about the same as a filter that can catch things like dust, pollen, and pet fur. It's similar to the basic filters in many home heating and cooling systems, cleaning the air without blocking too much airflow.
MERV ratings between 8 and 11 are best for keeping good airflow in home systems. These ratings clean the air effectively without blocking too much airflow, making the system work well while cleaning the air.
MERV 11 isn't too high for most homes. It cleans the air better for allergens and tiny particles while keeping good airflow. However, if your system is old or not very strong, make sure it can handle the better air cleaning.
MERV 8 air filters should be changed every 1 to 3 months. This depends on how clean your air is, how much you use your unit and if you have pets. Checking regularly helps you know if it needs to be changed sooner. Especially when you use it a lot in the summer or winter.
MERV 11 cleans the air better than MERV 8. Catching smaller particles like fine dust and allergens. However, MERV 8 doesn't block airflow as much, making it better if your system has airflow problems. The best one depends on how clean you want your air and how strong your heating and cooling system is.
The main problem with the highest MERV-rated filters is that they can block airflow. These filters can make your heating and cooling system work harder. This could cost more money and wear out the unit faster. Make sure your HVAC can handle a high MERV filter before using one.
Yes. MERV 8 filters are good at catching dust. They can catch big particles, including dust, pollen and pet fur, making the air inside cleaner and reducing the amount of dust moving around in your home.
A MERV level between 8 and 11 is good for most homes. These filters clean the air of common things like dust, pollen and pet fur. They don’t block too much airflow in most home heating and cooling systems.
A MERV rating of 11 is best for homes with pets. It catches pet hair, fur and other allergens better than lower-rated filters while keeping good airflow. It helps make the air inside cleaner, especially for homes with allergies or sensitivities.
