Shop by
Actual Size: 11.50x19.50x3.63"
3 month filters
2. Select Quantity
Buying multiple sizes?
You will still be able to review your order details.
Made in the USA
Ships in 24 hours
Available In MERV Rating: 8, 11, 13
Made in the USA
Ships in 24 hours
Scroll to see more.
 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 |
Generally, we recommend you replace your air filters every 90 days. Find out below if you should change your filters more often.
Change your filter every
6 weeks
to ensure indoor air quality is at its best.
Change your filter every
2 months
to avoid shedding and odor buildup.
Change your filter every
2-3 months
as having clean air is even more important with children in your home.
Change your filter every
6 weeks
to ensure indoor air quality is at its best.
Change your filter every
2 months
to avoid shedding and odor buildup.
Change your filter every
2-3 months
as having clean air is even more important with children in your home.
HVAC helps preserve indoor air quality. However, low quality air filters enable airborne pollutants to spread through the entire house.
Filterbuy 12x20x4 air filter provides elevated efficiency through its 98% contaminant trapping ability. It simultaneously advances both HVAC airflow and operational lifespan. The HVAC performance improves when homeowners select a high quality filter. This reduces dust accumulation and causes fewer allergy symptoms.
✔ Removes 99% of airborne pollutants. It stops dust and other air impurities from circulating.
✔ Minimizes indoor dust buildup. Keeps air vents and furniture cleaner.
✔ Supports allergy and asthma relief. Blocks fine particles that trigger respiratory issues.
✔ Boosts HVAC performance. Reduces strain on the HVAC. It also improves airflow.
✔ Lasts up to 90 days. Delivers consistent and high quality filtration.
"Over the years, we’ve tested various air filters, and Filterbuy air conditioner filter 12x20x4 consistently outperforms standard options. Homeowners who upgrade to high efficiency filtration notice cleaner air, better breathing conditions and improved HVAC performance. If you want a healthier home with less dust and fewer allergens this is a must have upgrade."
Before:
Daily sneezing, congestion, and itchy eyes indoors.
Dust buildup is noticeable within days of cleaning.
Standard filters are unable to capture fine allergens.
After Switching to Filterbuy 12x20x4 Pleated Air Filter:
✔ Significant reduction in allergy symptoms – Noticeable improvement in just weeks.
✔ 50% Less Dust Accumulation – Home stays cleaner for longer.
✔ Better Air Circulation – HVAC systems run more efficiently, reducing strain.
Before:
Floating pet dander and hair-triggering allergies.
HVAC systems clog frequently, leading to costly maintenance.
Persistent pet odors despite cleaning efforts.
After Upgrading to Filterbuy 12x20x4 Air Filter MERV 13:
✔ 60% Reduction in Pet Dander & Hair – Less floating allergens in the air.
✔ Fresher, Odor-Free Home – Noticeable improvement within two weeks.
✔ Increased HVAC Efficiency – Better airflow, lower energy bills, and extended system lifespan.
🔹 Advanced filtration technology – Captures particles as small as 0.3 microns.
🔹 Reduces airborne pollutants by up to 98% – Scientifically tested efficiency.
🔹 Designed for long-term use – Provides three months of consistent filtration.
Home air quality determines the state of your health as well as system performance and residence comfort. Research shows that high quality filtration systems protect your respiratory health and remove allergens while maintaining optimal HVAC performance.
Poor indoor air quality exposure generates health problems according to the Centers for Disease Control and Prevention. It causes asthma along with headaches, dry eyes, nasal congestion, nausea and fatigue. People who have existing lung conditions face an increased threat.
Indoor air quality suffers from various pollutants. This includes pet dander and mold spores.
Why It Matters: High efficiency air filters help reduce indoor pollutants. Leading to better respiratory health and improved well being.
Source: CDC
According to U.S. Department of Energy (DOE) HEPA filters succeed in capturing 99.97% of particles sized 0.3 microns or smaller, thus minimizing exposure to fine pollutants.
Standard filters demonstrate two main weaknesses by cutting ultra-fine particles while permitting allergens and bacteria to continue circulating through indoor air.
Why It Matters: The replacement of standard filters with HEPA-standard filters such as the Filterbuy 12x20x4 air filter MERV 11 removes tiny allergens from the air and enhances both air quality and allergy symptom reduction.
Source: DOE
The National Institute for Occupational Safety and Health reports that suitable indoor air filtration reduces airborne pollutant levels especially of PM2.5 which creates respiratory health problems.
Individuals who suffer from asthma, pet owners, and allergy-sensitive people benefit directly from improved filtration systems regarding their health.
Why It Matters: High-efficiency filters in the form of Filterbuy 12x20x4 allergen air filter models help decrease airborne pollution and establish a healthier indoor setting.
Source: NIOSH
High-quality air filters constitute an effortless method to enhance both indoor air quality and HVAC operational efficiency. Filterbuy best 12x20x4 air filter serves to remove pollutants while helping airflow better, decreasing maintenance expenses and improving indoor health conditions.
✔Filterbuy 12x20x4 air filter MERV 8. Captures 90% of airborne particles.
✔ Filterbuy 12x20x4 air filter MERV 11. Reduces indoor pollutants by up to 90%. ✔ Filterbuy 12x20x4 air filter MERV 13. Provides reliable filtration up to 98%.
✅ Allergy sufferers. Experience cleaner air and fewer symptoms.
✅ Pet owners. Reduce pet hair, dander and unwanted odors.
✅ Homeowners. Maintain a fresher home and extend the life of their HVAC system.
Do you notice excess dust or allergens?
Is your home’s air feeling stale or stuffy?
✔ Choose the Right Filter
Check your HVAC filter size: 12x20x4.
Select Filterbuy high-efficiency filter for superior performance.
Replace every 90 days for best results.
✔ Order Your 12x20x4 Air Filter from Filterbuy
Available online.
Look for multi-pack savings for long-term use.
Subscribe for hassle-free replacements.
✔ Install & Enjoy the Benefits
Replace your old filter in minutes.
Experience cleaner air, fewer allergens and improved HVAC performance.
Share your results and recommend them to family & friends.
Start Breathing Cleaner, Fresher Air – Upgrade to Filterbuy 12x20x4 Pleated Filter Today!
Family-Owned and Operated. We're a family-owned company. We are dedicated to providing clean air for homes across America.
Extensive Filter Selection. We offer a wide range of air filter sizes including hard-to-find custom options.
Fast and Free Shipping. Enjoy the convenience of fast and free shipping directly to your door.
Proudly Made in the USA. All our filters are manufactured in the USA. We use the highest quality American made materials.
Exceptional Customer Satisfaction. We are proud of our products, backed by over 85,000 5 star reviews from satisfied customers.
MERV 11 is not too high for residential use. It effectively filters out allergens and particles while still allowing adequate airflow. It's important to ensure that your HVAC system can handle the increased filtration.
A MERV rating between 8 and 11 is best for airflow. These filters strike a balance between capturing dust and allowing sufficient air to pass through without significantly restricting it.
Using an air filter that is too big causes issues. Such as improper sealing in the filter slot. This allows unfiltered air to bypass the filter. It's crucial to use the correct size for optimal performance.
High MERV filters can restrict airflow if not compatible with your HVAC. They causes strain on the unit and reduces efficiency. This leads to higher energy costs and may require more frequent maintenance.
A MERV 13 filter can damage your AC if the system isn't designed to handle the increased resistance to airflow. It's essential to check compatibility with your specific HVAC before using a high MERV filter.
Yes. Better air filters make your AC work harder if they restrict airflow too much. This increased resistance can lead to higher energy consumption. It may also require more frequent maintenance.
