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Actual Size: 19.88x24.75x4.38"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months





Actual Size: 19.88x24.75x4.38"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months





Actual Size: 19.88x24.75x4.38"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Many HVAC brands have unique trimmed sizes of their 20x25x5 filters.
For example, a 20x25x5 made for Honeywell systems will not fit other brand systems.
⚠️ This quick step can save you from ordering the wrong size. ⚠️
Find Your Exact Match By Choosing Your Brand Below:
Find Your Exact Match By Choosing the Actual Size (Also known as the trimmed size):
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: 19.88x24.75x4.38" in → 20x25x5 nominal.

Search by nominal size on our site for the best fit.


5″ filters give you maximum filtration with minimal maintenance — lasting up to 12 months while handling higher MERV ratings without restricting airflow.
Sizing note:

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























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 5 inches |
| Actual Size | 19.88 x 24.75 x 4.38" inches |
| Filter Type | Pleated |
| Media | Electrostatically Charged |
| Frame | Beverage Board |
| MERV Ratings Available | 8, 11, 13 |
| Lifespan | Up to 12 Months |
| Origin | Made in USA |
Filterbuy 2025x5 MERV 11 Honeywell replacement filter improves your indoor air quality. This filter gives cleaner and purer air to your place. Filterbuy’s filter also reduces the dust and allergies. Investing in this amazing product brings many health benefits and extends HVAC life.
How cost-effective does it prove? Are there extra benefits worth noting?
Let's examine these aspects to learn the real value of Filterbuy air filters Honeywell 20x25x5 MERV 11 replacement filter.
This filter from Filterbuy reduces airborne contaminants to enhance indoor air quality.
Allergy sufferers will find it easier to breathe because it lowers dust and allergens.
Cleaner air results from HVAC system performance that is enhanced by routine maintenance and use.
Purchasing in bulk and selecting auto-delivery options are economical ways to keep air quality at a high level.
An efficient filtering system is a wise investment for both your health and your wallet.
This filter is an amazing option to improve the quality of the air indoors. Its huge range of particle-trapping abilities make sure the air is cleaner, fresher, and healthier in your house.
Regular maintenance ensures your filter’s performance is at the top. Check the filter monthly, and replace it if it’s dirty. Stick to a strict three-month replacement schedule. This commitment not only prolongs HVAC lifespan. But also guarantees consistent and clean air quality indoors.
Breathe easy! Filterbuy’s Honeywell 20x25x5 MERV 11 replacement filter diligently works for your well-being.
Using MERV 11 filters gives many advantages. Noticeable improvements in air quality result from these filters. They capture a lot of harmful particles in the air.
Reducing dust benefits not only lungs but also furniture and floors. Spaces become healthier. This is very useful for people with allergies or those with pets.
Additionally, these filters boost HVAC system efficiency, which extends lifespan. Breathing becomes easier, while future repair or replacement costs decrease.
MERV 11 filters, like those offered by Filterbuy, are a valuable investment in health and finances.
Studies have shown that a clean air filter significantly reduces your energy bills up to 15%. A clogged filter forces your HVAC to work harder. This leads to higher energy consumption. While a new filter costs only a few dollars the potential savings on your electricity bills make regular replacements a worthwhile investment
Buy in bulk or set up recurring shipments. Simplify your life with bulk purchases. Or recurring shipments. Enjoy a 5% discount on recurring orders and never worry about running out of filters again. We'll deliver them right on schedule.
Breathe easier and keep expenses manageable with Filterbuy filter. You will not only save money but it also maintains high indoor air quality.
Regularly replacing the air filter protects both your health and budget. You don’t need to become an expert to change your Filterbuy air filter.
Changing your filter is simple:
Turn off your HVAC system for safety.
Locate the filter slot, often near the air return vent or the furnace.
Remove the old filter, noting the direction of the airflow arrows.
Slide the new filter in. Ensure the airflow arrows are pointing in the correct direction.
Replace your Filterbuy air filter every 1-3 months. Or more often if you have pets and allergies.

We believe in better air for all. We’re passionate about providing clean air for every home. We offer air filters in every size imaginable. Including hard to find custom options.
We offer fast and free shipping. Our filters are proudly made here in the USA. We use the highest quality American made materials. We're proud of the products we sell. With over 65,000 5-star reviews from happy customers.
A MERV 11 filter is not too restrictive for most residential HVAC systems. They effectively filter out small particles. Without reducing air flow. Or making your HVAC system work overly hard.
Whether you need a MERV 11 filter or not depends on your needs. A MERV 11 filter is not too restrictive. It provides a higher level of filtration compared to lower MERV-rated filters. Which is excellent for removing more particles from the air. But it may cause an increased load on your HVAC if it's not designed to handle such filters.
Change your MERV 11 filter every 3 to 6 months. Factors like your home's dust levels, the presence of pets and your HVAC's usage influence how often you need to replace it. It might be time for a change if you notice reduced airflow or increased dust accumulation. Regularly checking your filter is a good practice to ensure optimal performance.
Not all 20x25x5 air filters are the same. They vary in terms of MERV rating, material and filtration capabilities. While the dimensions may be identical, the effectiveness of the filters differs greatly. Always consider the MERV rating and the specific needs of your HVAC when selecting a filter.
Higher MERV filters can restrict airflow. The filter's weave becomes tighter as the MERV rating increases. It’s harder for air to pass through. This causes your HVAC to work harder.
You can replace a MERV 11 filter with a MERV 12 filter. Provided your HVAC can handle the increased filtration. MERV 12 filters capture smaller particles. This improves indoor air quality even further. However, it's important to monitor your unit's performance as higher-rated filters may restrict air flow if your HVAC can’t accommodate them.
MERV 11 filters restrict airflow more than lower-rated filters. But they are designed to balance filtration efficiency with airflow. If your HVAC is well-maintained and designed to handle a MERV 11 filter, you shouldn't experience significant airflow issues. Regularly checking your HVAC's performance helps you identify any potential problems related to air flow.
MERV ratings between 8 and 11 are considered ideal for maintaining good airflow while providing adequate filtration. These ratings effectively capture dust, pollen and pet dander without creating excessive resistance in your HVAC. The best MERV rating for airflow also depends on your specific HVAC and its design capabilities.
Yes. There is a noticeable difference between MERV 11 and MERV 13 filters. MERV 13 filters capture smaller particles. Including some bacteria and respiratory droplets. This makes them more effective in improving air quality. They also restrict airflow more than MERV 11 filters. So it's important to ensure your HVAC can handle the higher MERV rating before making a switch.
Change your 20x25x5 furnace filter every 3 to 6 months. Depending on your specific conditions. Factors such as the number of occupants, pets and overall dust levels in your home affect how quickly the filter becomes clogged. Regularly checking the filter will help maintain optimal airflow and efficiency in your HVAC unit.
Using a 20x25x4 filter instead of a 20x25x5 is not recommended. The dimensions and thickness are different. A 20x25x5 filter is designed to fit into a specific slot in your HVAC. And a thinner filter may not create a proper seal, leading to bypassed air and reduced filtration efficiency. Always use the correct size filter for your unit to maintain optimal performance.
Yes. MERV 11 filters help filter out mold spores from the air. They are effective at capturing particles in the size range of mold spores. Which improves indoor air quality. If mold is a significant concern in your home, consider using a filter with a higher MERV rating or additional air purification methods to address the issue more effectively.