16x25x4 MERV 11 Pleated Air Filter
Actual Size: 15.5x24.5x3.63
Free Delivery 
Factory-Direct Low Prices, Made in the USA
Hassle-Free Returns & Free Exchanges
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
16x25x4 MERV 11 Pleated Air Filter
Actual Size: 15.5x24.5x3.63
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
16x25x4 MERV 11 Pleated Air Filter
Actual Size: 15.5x24.5x3.63
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 16x25x4 MERV 11 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
- Actual air filter size: 15.5x24.5x3.63
- MERV 11 synthetic media (comparable with MPR 1000/1200 and FPR 7) offers superior protection from dust, pollen, pet dander, mold, smog and more by trapping 95% 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 16x25x4 Air Filters
Important Honeywell Size Compatibility Note
If you are replacing a Honeywell 16x25x4 or 20x25x4, your Filterbuy replacement is a 5” filter.
The 5” Filterbuy replacement filter is trimmed down to the “actual” size of your original 4” Honeywell filter.
⚠️ Find your compatible filter by choosing one of the filters below. ⚠️
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., 16x25x4).
- 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., 15.5x24.5x3.63 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: 15.5x24.5x3.63 in → 16x25x4 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.
Why Choose a 4″ filter
4″ filters offer better airflow and a longer life (6–9 months) than standard 1″ or 2″ filters — ideal for homes with pets or allergy concerns.
Sizing note:
- Requires a 4″ filter cabinet or compatible system.
- ″4 inch″ is nominal; actual thickness is typically around 3¾″.
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
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
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 | 16 x 25 x 4 inches |
| Actual Size | 15.5 x 24.5 x 3.63 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 |
Exclusive Savings on Filterbuy 16x25x4 MERV 11 Filters
Filterbuy 16x25x4 MERV 11 air filters are the best! They're MERV 11 rated and they'll trap many types of particles.
Save with discount codes and bulk buys. These filters reduce HVAC strain and improve energy efficiency.
Key Takeaways
Subscribe to Filterbuy email newsletters for special discount codes.
Bulk purchase Filterbuy 16x25x4 MERV 11 filters to reduce costs per unit.
Check for ongoing seasonal promotions on Filterbuy air filters.
Maintain and replace filters regularly to make your HVAC live longer. This ensures long term savings.
MERV 11 Air Filters
MERV means Minimum Efficiency Reporting Value. This rating shows how efficient an air filter is. Filters with MERV 11 rating traps small particles. It's great for households with allergies. This filter traps 95% of particles in the air like:
Regular replacement and monitoring are important. This maintains air quality and efficiency.
Tips for Maintaining Your Air Filter
Cleaning your filter improves air quality. A dirty filter strains your HVAC, increasing energy use and costs. Regular maintenance saves money and extends filter life.
Replacement Schedule - Change air filter every 60 to 90 days. Homes with pets and allergies need to change them more often.
Keep Extras on Hand - Always have spare filters available to avoid unexpected issues.
Ensure Proper Fit - Make sure there are no gaps in the filter's fit. This maintains effectiveness while avoiding damages.
Filterbuy 16x25x4 MERV 11 pleated air filters are designed with simplicity and efficiency. This user-friendly approach makes them easy to maintain. This focus on practicality sets Filterbuy filters apart from competitors, offering a convenient and hassle-free experience for all users.
How to Save on Filterbuy Filters
You might be surprised how easy it is to save on Filterbuy 16x25x4 MERV 11 pleated air filters near you!
Keep an eye out for discount codes, often released through Filterbuy websites and newsletters. Signing up can lead to significant savings, making replacements more affordable.
Consider purchasing in bulk. Larger quantities often result in lower prices per item. Filterbuy offers discounts on bulk orders of their furnace 16x25x4 MERV 11 pleated air filters. This option suits those with multiple HVAC systems or those looking to stock up.
Why Choose Filterbuy Filters
Top air filters like those from Filterbuy improve health and indoor air quality. We offer free shipping straight to your door. All our filters are proudly made here in the USA. Materials are made with the highest quality. We're proud of the products with over 85,000 5 star reviews from happy customers.
Here are more reasons why choose Filterbuy:
Better Indoor Air Quality: Greater pollutant capture means cleaner, fresher air.
Better Efficiency: Longer-lasting, smoother, and efficient.
Health Benefits: Blocks harmful particles like dust and mold. Reducing allergies and respiratory issues.
Cost-Effective: Higher cost, but less bills and replacements.
Easy to Maintain: Less frequent changes, saving time and effort.
Frequently Asked Questions
Is MERV 11 too high for residential?
A MERV 11 filter is not really too high for residential since it always comes recommended in homes. The wide range of particles, including pet dander, dust mites, pollen among others, is highly captured; thus, it improves indoor air quality significantly.
Does a MERV 11 filter restrict airflow?
No. 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 system. If it's not designed to handle such filters.
Is the MERV 11 air filter good?
MERV 11 filters are considered good for residential applications since they provide an ideal balance between particle filtration efficiency and airflow. It can capture particles as small as 1.0 to 3.0 microns in size. Thus being suitable for improving indoor air quality by removing allergens along with other contaminants.
Is there a downside to high MERV filters?
The only downside with high MERV filters is that they can potentially choke the airflow if your HVAC system is not designed to pull in the extra resistance. This will drop the efficiency and may overwork the system. It is necessary to make sure that your HVAC system is compatible with higher MERV ratings before upgrading your filter.
What MERV rating is best for airflow?
MERV ratings between 8 and 11 are the best that provide a balance of good filtration with optimum airflow in residential settings. The ratings will offer adequate filtration to enhance indoor air quality without overly restricting airflow.
What is the highest MERV for a house?
The highest rating generally recommended for residential use is MERV 13. A filter of this rating is capable of capturing very small particles, a portion of bacteria, and virus carriers; however, they may also create a considerable hindrance to airflow if the HVAC system is not designed for such a filter.
How long do MERV 11 filters last?
MERV 11 filters are normally good for 3 to 6 months. Their length may be determined by such things as air quality, household size and pets. It is important to note that one should check the filter more often and change it when necessary for optimal performance and air quality.
Are thicker air filters bad for HVAC?
Thicker air filters are not inherently bad for HVAC systems, but they do create more resistance to flow. If a system is not designed to take a thicker filter, the system will have lowered efficiency and increased wear. Always check the specifications of your HVAC system for any recommendations about using a thicker filter.
Is MERV or HEPA better?
HEPA filters are much more effective at catching extremely small particles, such as those that can transport bacteria and viruses. However, these HEPA filters also significantly impede airflow, and generally are not suggested for use in standard residential HVAC systems without modifications. MERV filters, rated between 8 and 13, offer a good balance for most homes.
Can I use MERV 11 in my house?
Yes. You can use a MERV 11 filter in your house. Provided your HVAC is compatible with this level of filtration. MERV 11 filters are effective at capturing a wide range of particles and thus can help improve indoor air quality with minimal restriction to airflow in most residential systems.
Will MERV 11 remove smoke?
Smaller smoke particles can be captured partly by MERV 11 filters, but not as effectively as would be captured by higher-rated filters or filters specifically designed to remove smoke. If filtration of smoke is desired, one may have a better option in using a MERV 13 filter or an independent air purifier with a HEPA filter.
Are MERV 11 filters good for allergies?
Yes. MERV 11 filters are good for allergies since they capture a significant amount of common allergens: pet dander, pollen and dust mites. With the use of a MERV 11 filter, allergic reactions can be reduced. General indoor air quality can be improved.