11.25x23.25x1 Air Filters
Actual Size: 11.25x23.25x0.75

3 month filters
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Made in the USA
Ships in 24 hours
11.25x23.25x1 Air Filters Air Filter Description
Available In MERV Rating: 8, 11, 13
Made in the USA
Ships in 24 hours
Merv comparison
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MERV 8 | MERV 11 | MERV 13 | |
|---|---|---|---|
| Best for | Standard Residential/Commercial Healthy Families | Superior Residential/Commercial Allergy Sufferers | Optimal Residential/Commercial Hospital Grade |
| Comparable ratings | MPR 600 & FPR 5 | MPR 1000-1200 & FPR 7 | MPR 1500 - 1900 & FPR 10 |
| Filtration | Captures 90% of Airborne Particles | Captures 95% of Airborne Particles | Captures 98% of Airborne Particles |
| Dust, lint & debris | |||
| Mold, pollen | |||
| Dander, dust mites | |||
| Smoke & Smog | |||
| Bacteria | |||
| Odor, vocs |
Is it time to change your filter?
Generally, we recommend you replace your air filters every 90 days. Find out below if you should change your filters more often.

If someone in your home has asthma or allergies...
Change your filter every
6 weeks
to ensure indoor air quality is at its best.

If you have pets...
Change your filter every
2 months
to avoid shedding and odor buildup.

If you have young children...
Change your filter every
2-3 months
as having clean air is even more important with children in your home.

If someone in your home has asthma or allergies...
Change your filter every
6 weeks
to ensure indoor air quality is at its best.

If you have pets...
Change your filter every
2 months
to avoid shedding and odor buildup.

If you have young children...
Change your filter every
2-3 months
as having clean air is even more important with children in your home.
Filterbuy 11.25x23.25x1 Pleated Air Filter: Best Air Filter for Your Home
A silent hero is always working behind the scenes, that's no other than your air filter. This simple component plays an important role in maintaining healthy indoor air quality and ensuring your comfort.
Selecting the best air filter is also important to consider. Standard filters let microscopic particles slip through. We recommend using our pleated design filters that trap more dust, dander and allergens. Thanks to its high surface area and precision fit. In this post, we'll dive into why choosing the right air filter isn't just a suggestion, but a necessity for every home.
Top Takeaways
Captures more dust, pollen, and allergens without restricting airflow.
Reduces airborne particles by up to 98%—confirmed by both studies and field use.
Great for homes with asthma, pets, or allergy concerns.
Trusted by experts.
Why Indoor Air is Important
Dust, pet dander, mold spores and even microscopic pollutants are just some of the tiny particles that dwell in our homes. These allergens directly impact our well being. EPA says poor indoor air quality worsens allergies and asthma.
Prioritizing clean indoor air is also important for your HVAC. This also reduces energy consumption. Your HVAC runs more efficiently when your home is cleaner. In turn, this extends its lifespan and lowers your utility bills.
Investing in solutions that enhance indoor air quality, such as using Filterbuy high-efficiency air filters, ensures a healthier environment for your family and contributes to the optimal performance of your HVAC.
Selecting the Right Furnace Filter
Finding the ideal filter for you can be tricky. Below explains the different types of filters and other things to consider so you can choose the best for your home.
Do these steps:
Know what your furnace needs: All furnaces need a particular size of filters. This is the kind of thing you should know about your furnace.
Know the types of filters: There exist several, including fiberglass, pleated, and electrostatic filters. Each has its unique purpose; therefore, determine which would best suit your needs.
Consider air quality: Sensitivity to allergens or dust calls for a filter with a higher MERV rating. This type captures more particles, enhancing your home's air quality.
Stay on top of filter maintenance: Regular checks and replacements keep filters efficient. Replace the filter every 60 to 90 days. Dirty filters not only compromise air quality but also strain your furnace.

Filterbuy 11.25x23.25x1 Air Filter for Allergies Works So Well
We’ve used Filterbuy 11.25x23.25x1 air filters across dozens of custom systems. Here's what makes it effective:
More pleats = more surface area to trap dust, dander, and pollen. Our pleated air filters are at least 20 times more efficient than standard fiberglass filters at capturing dust, allergens, and bacteria.
Durable frame holds shape, even after 90 days of use. These filters feature a strong beverage board frame that can handle humidity and temperatures up to 200° F. No warping or weakening here under high temperatures.
We use a special synthetic electrostatic media. This advanced material is significantly more efficient at capturing particles compared to basic cotton media used in other filters.
We don’t just recommend this filter—we rely on it. This high efficiency filter cuts particles up to 98%. We’ve tested this pleated filter using PM2.5 monitors and we see air quality improve within 48 hours. NIH research confirms: pleated filters dramatically reduce fine airborne particles.
In homes where air quality matters, Filterbuy air conditioner filter 11.25x23.25x1 consistently delivers noticeable improvements.
Easy Guide on Replacing Your Air Filters
Installing the best 11.25x23.25x1 air filter from Filterbuy is not a time-consuming task. User-friendly design coupled with compatibility across diverse HVAC systems contributes to this convenience.
These filters focus on simplicity and efficiency, allowing homeowners to handle the process with ease. This practical aspect sets Filterbuy filters apart from competitors.
Here are easy steps for a stress-free installation process:
Take out your new air filters from Filterbuy packaging.
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.
Why choose Filterbuy?
We're a family owned company, dedicated to providing clean air for homes across America.
We offer a wide range of air filter sizes, including hard to find custom options.
Enjoy the convenience of fast and free shipping directly to your door.
All our filters are manufactured in the USA using the highest quality American made materials.
We are proud of our products, backed by over 85,000 5 star reviews from satisfied customers.
Frequently Asked Questions
Is MERV 11 too high for residential?
MERV 11 is suitable for residential use. It offers good filtration without overly compromising airflow for most modern HVAC systems.
Is it better to use cheap or expensive air filters?
Expensive air filters provide better filtration and durability, but the choice depends on specific needs such as air quality concerns and budget constraints.
What MERV rating is best for airflow?
MERV ratings between 5 and 8 are optimal for maintaining airflow while providing adequate filtration in most residential HVAC systems.
How often should I change my 20x25x1 air filter?
A 20x25x1 air filter should be changed every one to three months. This depends on air quality, usage and environmental conditions.
Can I use a 20x25x4 instead of a 20x25x5 filter?
Using a 20x25x4 filter instead of a 20x25x5 may not fit properly, potentially leading to unfiltered air bypassing the filter; always use the size recommended by the manufacturer.
How to install an 11.25x23.25x1 air filter?
Turn off your HVAC system's power.
Have your new air filter ready.
Carefully remove the old air filter.
Note the direction of the airflow arrows on the old filter.
Insert the new 11.25x23.25x1 air filter into the slot.
If there is a cover over the filter, replace it securely.
Turn the power back on.