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Actual Size: 19.88x24.75x4.38"
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Factory-Direct Low Prices, Made in the USA
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RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 19.88x24.75x4.38"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
Actual Size: 19.88x24.75x4.38"
Free Delivery Factory-Direct Low Prices, Made in the USAHassle-Free Returns & Free ExchangesRESIDENTIAL 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 & DebrisDust Mites & ParticlesPollenMoldLintDander
Smoke & Smog
Comparable to:FPR: 10
MPR: 1900-2800
Dust & DebrisDust Mites & ParticlesPollenMoldLintDanderSmoke & 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 |
Tiny and dangerous particles won't stand a chance against this filter. With its MERV 8 rating, it’s the guard of your HVAC, keeping unwanted dust and debris out.
Improving air quality is not the only advantage. By reducing strain on your equipment, this filter helps minimize energy costs. Our filters are made of synthetic materials, and they offer both durability and resistance to moisture or mold growth.
This Filterbuy filter traps particles measuring 3 to 10 microns, including dust, pollen, and mold spores. This is especially useful for improving air quality.
This product is made from synthetic materials which resist moisture and prevent microbial growth.
Energy conservation is a priority in its design. It reduces strain on HVAC and contributes to lower bills.
The secure placement in the filter slot makes installation straightforward. It’s able to align with the airflow direction.
Maintenance involves replacing filters every 60 to 90 days, looking for clogs regularly, and vacuuming to eliminate larger debris.
MERV stands for Minimum Efficiency Reporting Value. These ratings are a universal standard, which outlines an air filter's ability to trap and eliminate air particles of varying dimensions. On a scale of 1 to 20, higher ratings have an increased capacity for capturing smaller particles.
Filterbuy Honeywell 20x25x5 MERV 8 replacement filter sits comfortably in the middle of these ratings. This filter balances air quality improvement with energy efficiency. So it traps particles sized between 3.0-10.0 microns. It’s an ideal choice for homes seeking a clean, healthy indoor environment.
MERV 8 filters maintain equilibrium, ensuring satisfactory filtration without a major impact on HVAC system performance.
Filters from Filterbuy are designed for optimal balance and efficiency. They capture huge amounts of airborne pollutants and ensure no strain on your unit.
It captures 90% of airborne particles. MERV 8 is a perfect choice in removing dust, lint, mold, dander and dust mites. It’s a great all around filter that is versatile in a lot of homes.
Built from synthetic material, this filter resists moisture and stops microbial growth, assuring long and consistent performance.
The filter's design includes pleating, which increases its surface area and its capacity to trap more particles. This enhances its efficiency. And also extends the duration between replacements. This contributes to its cost effectiveness. It’s also user friendly. It doesn't need professional assistance when replacing them.
Replacement of Filterbuy air filters is a simple task. Their user friendly design coupled with compatibility across diverse HVAC systems contributes to this convenience.
Here are easy steps for a stress-free installation process:
Take out your new air filters from Filterbuy.
Detach the existing filter from the HVAC system.
Verify system compatibility with the filter.
Fit the new filter into the system.
Start experiencing better air quality in your environment.
Filterbuy Honeywell 20x25x5 MERV 8 replacement air filters are known for optimal indoor air quality and energy efficiency. Proper maintenance is required to ensure the product's durability.
Although it can vary based on usage and environmental conditions, changing filters every three months is advisable. Regular checks can provide clear timing for replacements. A dark and clogged filter indicates the need for a replacement.
Also, don’t forget about cleaning. Gentle vacuuming removes larger debris from the filter's surface. However, refrain from washing filters as moisture might damage the filter media, decreasing its efficiency. Regular upkeep ensures the filter's longevity and performance.
These filters excel at improving air quality and trapping harmful airborne substances. This reduces allergies and respiratory issues, ensuring a healthier living environment.
Energy efficiency gets a boost. Having a clean, unblocked filter eases the strain on your HVAC system, leading to less energy usage and lower bills.
They are designed for durability and last for months. Meaning fewer replacements and saving time. Their amazing construction resists collapsing under pressure, which guarantees consistent performance.
Investing in these replacement filters contributes to healthier living and energy conservation. Beyond purifying the air, these filters offer a great solution for managing indoor air quality and enhancing energy efficiency.
Just remember, cleanliness makes a filter happy, and such a filter contributes to a happy home!
The frequency is largely dependent on several factors. Such as home air quality, number of occupants, and presence of pets. A general rule of thumb is to replace the filter every 60 to 90 days. However, if your home has multiple pets or individuals with allergies, a more frequent maintenance schedule. Perhaps every 30 to 45 days is recommended.
MERV 8 filters vary in their ability to reduce dust accumulation, improving performance and requiring less frequent maintenance. These benefits contribute to a healthier living environment. Not all MERV 8 filters offer the same degree of efficiency.
They offer a balance between efficient filtration and airflow resistance. This makes them suitable for most residential settings. Systems with higher air quality requirements might necessitate a higher rating.
High MERV filters trap more and smaller particles. They may also restrict airflow in your system. This strains the system, leading to increased energy usage and potential breakdowns, which are significant efficiency trade-offs.
The symptoms include reduced airflow, a dustier environment and an increase in energy consumption. As your system works harder to maintain the same level of performance. Unusual system noises or a noticeable drop in heating or cooling efficiency indicates a dirty one.
Neglecting regular changes leads to a host of negative consequences. A dirty or clogged one restricts airflow, forcing the furnace to work harder, which results in decreased furnace efficiency. Over time, this added strain leads to higher energy bills and a potential reduction in the lifespan of the furnace.
Knowing when to change your furnace plays a significant role in preventing the negative consequences outlined previously. Essential for effective maintenance, a keen eye for signs of a dirty or clogged extends its lifespan and improves efficiency. Look for dust build-up or a drop in air quality as early indicators.
Turning off your furnace before replacing the filter is a wise decision. This precautionary step not only ensures your safety. But also prevents any dust or debris from being pulled into the furnace during the process.
Its benefits are numerous and primarily revolve around improved efficiency. The larger surface area captures more particles, reducing the strain on your furnace and improving overall air quality. They last longer than their thinner counterparts, contributing to fewer changes and, consequently, less potential disruption to your furnace's operation.
A day without a filter can have a noteworthy impact on your home's air quality. Its primary function is to trap dust, pollen and other airborne particles. Protecting both the equipment and the air you breathe. When absent even for a day, these contaminants circulate freely, potentially leading to health issues and system efficiency problems.
Their lifespan typically ranges between 3 to 6 months. Depending on the air quality in your home. Regular maintenance such as vacuuming the surface and checking for visible damage further extends the filter's lifespan.
A 20x25x5 filter provides more surface area for trapping pollutants but requires a deeper slot. A 20x25x4 filter is thinner, fitting more compact systems. The choice largely depends on your system's specifications and the air quality needs in your home.
