Without the best air conditioner filters, air conditioners cannot run smoothly like they are supposed to. This is because the air filter is the main component that keeps the air conditioner running properly from time to time. The air filter can either break or build your air conditioner. If you have a worn out air filter then you will experience so many negative things including low air flow.

The best air conditioner filter is well-made and durable to last somewhere between 30 days and 90 days. At the same time, it should be washable and reusable to enable you to save up a lot of money on maintenance and replacement. The best air filter should be highly efficient to attract and capture most air particles that cause you to cough, sneeze, or get ill.

Best of all, it should offer great value for money. Now that you know what makes the best air filter, here are some of the products that made it to the top 10 best air conditioner filters in 2021 reviews

List the Best Air Conditioner Filters in 2021 on Amazon.com

01. Filtrete 14x20x1, AC Furnace Air Filter, MPR 300

Make your indoor air cleaner and healthier with the Filtrete 14x20x1, AC Furnace Air Filter, MPR It delivers a cool breeze that carries dust, dander, and microscopic debris around your home to help create a fresher environment. This air filter is rated 300 MPR (Microparticle Performance Rating) that equates to MERV5 to provide optimum performance.

With a 3-in-1 technology, this air filter traps unwanted air particles while allowing cleaner air to flow through. It is non-electrostatic and washable to ensure reliable performance that outperforms fiberglass. This air filter is versatile, making it ideal for HVAC systems, air conditioners, and furnaces among others. What’s more, it is built for residential use, meaning it is a great purchase for your household needs.

Key Features

  • 300 Microparticle Performance Rating
  • Non-electrostatic and washable
  • Efficient 3-in-1 technology
  • Six, 3M traps per package


  • Traps more dirt particles from the air
  • Ideal for high-velocity equipment
  • This air filter is of good quality and works well
  • The price is good and offers great value for the money

02. FilterBuy 20x20x1 MERV 8 Pleated AC Air Filter, Silver

Improve your indoor air quality by introducing the FilterBuy 20x20x1 MERV 8 Pleated AC Air Filter. It is designed to be high-quality and long-lasting to give your home the air quality it requires so you can breathe better. This air filter has pleats that provide more surface area to trap more particles from the air.
Its frames are made of beverage board to ensure it remains strong even in humid areas and temperatures of up to 200° F.

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This air filter is rated MERV 8, meaning it is powerful enough to be used for standard residential and commercial applications. It is made up of synthetic media that provides significantly higher particulate efficiency than standard cotton media. As such, this filter can trap 90% more airborne particles for a cleaner, fresher air quality.

Key Features

  • High-quality beverage board frames
  • Efficient synthetic media
  • 12 pleats per foot
  • MERV 8 efficiency rating


  • Suitable for residential and commercial use
  • Seems well-made and long-lasting
  • Traps up to 90% of air particles
  • This filter is affordably priced for almost everyone

03. Filtrete 12x12x1, AC Furnace Air Filter, MPR 1000

From lint to pollen and dust to pet dander, the Filtrete 12x12x1, AC Furnace Air Filter can capture it all. It is designed to pull in and trap unwanted dust to help turn your central cooling and heating system into a whole house air cleaner. This air filter has an MPR of 1000 that equals to MERV 11.

This air filter is well-made to ensure it can last somewhere between 60 to 90 days. It uses 3-in-1 technology to provide the perfect balance between airflow and cleanliness. This filter is thick enough to create a good seal in air return. Furthermore, it is easy to install with simple instructions that are self-explanatory.

Key Features

  • Energy-efficient design
  • Higher MPR of 1000
  • Washable and non-electrostatic
  • Sturdy and durable craftsmanship


  • Available in various sizes to pick from
  • The 6-pack offers good value for the money
  • Suitable for all residential needs
  • Eliminates dust, pollen, smoke, and soot

04. Filtrete 2021-4PK 12x24x1, AC Furnace Air Filter, MPR 1500

Because your home should be your safe haven, the Filtrete 2021-4PK 12x24x1, AC Furnace Air Filter is here to make the air in it clean and fresh. It is designed to capture all unwanted particles from your household air including bacteria, allergen, and viruses among others. This air filter is proven to be 90% effective against all microscopic particles.

This filter is washable and non-electrostatic to give you reliable and long-lasting performance. It is ideal for all residential air filtration needs for the furnace, AC, or HVAC system. This model has a higher MPR rating of 1500 that translates to MERV It, therefore, does a better job at capturing microscopic particles such as smoke, sneeze debris, and cough.

Key Features

  • 54% small particle capture
  • Certified as asthma and allergy friendly
  • Non-electrostatic and washable
  • MERV 12 and 1500 MPR


  • Delivers optimum performance for heating and cooling systems
  • Available in different sizes to choose from
  • Attracts and captures large and small particles
  • Comes with a Filtrete Smart app to help you create a change countdown

05. Nordic Pure 16x25x1 AC Furnace Air Filter, 6 Pack

Constructed of heavy-duty beverage board frame, the Nordic Pure 16x25x1 AC Furnace Air Filter is sturdy to last several uses. It is moisture-resistant to ensure it can sustain moist environments without getting damaged. This air conditioner filter is electrostatically charged to attract all unwanted particles. And the filter media included is high-quality to inhibit the growth of mold or bacteria.

This air filter is made with keen attention to detail to ensure it is better at capturing airborne particles, unlike fiberglass filters. It helps to remove pet dander to protect you and your loved ones from asthma and allergies. This filter has a MERV rating of 12; then again, it is available in other ratings to enable you to choose according to your preferences.

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Key Features

  • Hypoallergenic and anti-microbial pleats
  • High-quality construction
  • Electrostatically charged media
  • Heavy-duty beverage frame


  • Suitable for home and commercial environments
  • Captures airborne particles as small as 0.3 microns
  • This filter can last 30 to 90 days
  • Removes all allergens and pet dander

06. NaturalAire Standard Air Filter, MERV 8, 22 x 22, 1-inch, 12-Pack

Housed in a recyclable clay-coated frame, the NaturalAire Standard Air Filter is sturdy and moisture-resistant. It uses a mechanical media that maintains the minimum listed efficiency throughout the 90-day service life of the filter. This unit can capture particles as small as 1 micron. Thus, it is effective against mold spores, pet dander, household dust, mites, and debris among others.

This air filter tests as a MERV 8 rating through ASHRAE 52.2 testing methods to deliver the best performance. It has pleated media to provide a larger surface area for more effective filtration while keeping the airflow resistance low. Plus, this unit comes in a pack of 12 high-quality filters designed to protect the furnace and central air units.

Key Features

  • Efficiency of up to 90 days
  • Compatible with HVAC systems requiring filters sized 22″ x 22″
  • Pleated media for more effective filtration
  • Moisture-resistant frame


  • This is a great filter for the price
  • Fits perfectly as expected
  • Works well and offers good value for the money
  • The filters are individually packed for storage

07. MervFilters 10x10x1 AC Air Filter, MERV 8

The MervFilters 10x10x1 AC Air Filter consists of 6 air filters with a lifespan of over 3 months of resilient filtration each. Each filter is easy to replace so you won’t even need any special skills or experience. This filter is made with advanced pleated technology to deliver greater surface area meaning more air coverage. The filter is thicker to ensure greater capacity and extend the life of your furnace or AC.

Featuring premium construction made in the USA, this air filter delivers top quality performance. It contains electrostatically charged synthetic fibers that attract large particles without absorbing moisture. This filter will, therefore, trap all airborne particles that may bring harm to you and your family. Even better, it is universally compatible so it can work with furnaces, ACs, and HVAC systems of almost any brand.

Key Features

  • Advanced pleated technology
  • Top-quality construction
  • Universal compatibility
  • Electrostatically charged synthetic fibers


  • Available in three varieties to select from
  • Creates a cleaner indoor environment
  • Over 3-month’s resilient filtration lifespan
  • Captures large particles of size 3 to 10 microns

08. K&N 16x25x1 HVAC Furnace Air Filter

Featuring high-quality ABS polymer frame, the K&N 16x25x1 HVAC Furnace Air Filter is built to last. It is composed of washable synthetic air filter media made to be cleaned and reused as often as possible to maintain the airflow. The air filter media is easy to clean as all you have to do is remove it from the housing and spray on the filter cleaner.

The air filter is built for direct replacement to ensure that it is easy to do for most people. The best part is that it comes in multiple dimensions and sizes to allow for easy installation. This air filter is specifically engineered to reduce contaminants in the air, helping to improve air quality. Besides, it has germ-blocking protection for better protection against allergens, viruses, and bacteria.

Key Features

  • Washable and reusable design
  • Premium design and high-quality construction
  • Germ-blocking protection
  • Direct replacement craftsmanship


  • Easy to clean and to maintain
  • Suitable for homes with children and allergy sufferers
  • Available in various sizes to choose from
  • Instructions are included for added convenience

09. K&N 24x30x1 HVAC Air Filter, HVC-12430

Made up of pleated synthetic filter media, the K&N 24x30x1 HVAC Air Filter is washable and reusable to the last several uses. You can, therefore, count on it to deliver exceptional filtration for longer life performance. This air conditioner filter is easy to clean and to maintain. Simply rinse with a low-pressure hose, let dry and reinstall it to keep enjoying the benefits.

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Constructed of a durable frame featuring ABS polymer, this air conditioner filter is built to last. It is designed for direct replacement, making it very easy to install and to remove for cleaning. This air conditioner filter guarantees premium quality and performance as it removes smoke, pollen, dust, and pet dander among others. Hence, it results in clean and fresh indoor air quality.

Key Features

  • Durable and well-constructed
  • Washable and reusable design
  • Wide compatibility
  • Decent filter size


  • Easy to use and to clean
  • Seems to last long and give great value for money
  • Helps to increase HVAC Efficiency
  • Improves indoor air quality

10. Nordic Pure 12x20x1 MERV AC Air Filter, 6 Pack

Given the efficiency and versatility of the Nordic Pure 12x20x1 MERV AC Air Filter, it is ideal for both home and commercial use. It works by ensuring that every time air flows through, it filters dust, lint, bacteria, pollen, mites, and pet dander. This air conditioner filter is compatible with HVAC filters with ratings of MPR 1500-1900 or FPR 9.

Made of heavy-duty beverage board, this air filter is sturdy to stand the test of time. It is for this that it is water-resistant to thrive even in moist environments. This unit is designed to remove allergens and pollutants that could cause sneezing and coughing. What’s more, it has a higher MERV rating of 12 to give you reliable filtration.

Key Features

  • Recycled beverage board paper frame
  • Versatile design
  • Durable construction
  • Washable and reusable


  • This filter can last up to 3 months
  • Helps those with mild allergy
  • Available in a wide range of styles to choose from
  • Eco-friendly and easier on the environment

Buyer’s Guide for the Best Air Conditioner Filter

Finding the best air conditioner filter can be a daunting task. Which is why, we made a compilation of some of the most crucial factors to keep in mind, take a look!


MPR is the acronym for Micro-particle Performance Rating. It refers to the ability of the filter to capture airborne particles. The MPR rates air filters with their ability to capture particles smaller than 1 micron. The best air filters have an MPR rating of between 1500 and However, you can come across products with less than this rating. In this case, the higher the number of MPR the better the air conditioner filter.


Construction determines the longevity of most items and so does that of the best air conditioner filter. As such, you have to pay attention to the build quality of the filter to find a unit that can last several uses. Consider an air filter made of high-quality but recycled materials to ensure it is easy on the environment. Similarly, make sure the filter can be washed and reused over and over for added durability.


The best air conditioner filter should be highly efficient. This means that it should capture a larger percentage of micro-particles from the air. The efficiency of each air conditioner filter is indicated on the package. Make sure it is something between 80 to 90%. Furthermore, high-efficiency filters are marked by their ability to capture various types of air particles. The more the variety is the better, and don’t forget to check the MERV rating value.


If you don’t have a properly functioning air conditioner filter, you risk so much not to mention getting ill. These filters are effective and have been proven to be safe for use around children and allergy sufferers. So no matter what type of AC you have, you can find the ideal AC filter in the above air conditioner filters reviews in 2021.