Best Air Conditioner Filters Reviewed

Tony Case
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How do you choose the best air conditioner filter for your home?

Air conditioners are very efficient devices that can keep your home cool in the summer months. But they do so much more than that.

An air conditioning system installed in your house or apartment can become a crucial part of keeping yourself healthy and happy. Most people enjoy their home more during the cooler months because they have the luxury of using air conditioners without worrying too much about electricity bills. On top of that you will find yourself spending more time in your home, which can be conducive to productivity.

So having an air conditioner in your house can have a really positive effect on your life. However, it’s important to make sure that you purchase a good unit and take good care of it. To do this you’ll need to make sure that you purchase the right air conditioner filter for your unit. The last thing you want is to go out and spend a few hundred dollars on a unit, only to find it doesn’t work as well as you thought it would because you were not careful about the filter you choose.

Nordic Pure 16x25x1 MERV 12 Pleated AC Furnace Air Filters 6 PackBest OverallNordic Pure 16x25x1 MERV 12 Pleated AC Furnace Air Filters 6 Pack
EPAuto CP285Budget PickEPAuto CP285
Honeywell Replacement MediaUpgrade PickHoneywell Replacement Media

1. Nordic Pure 16x25x1 MERV 12 Pleated AC Furnace Air Filters 6 Pack

Our rating: 9 / 10

Nordic Pure 16x25x1 MERV 12 Pleated AC Furnace Air Filters 6 Pack

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The Nordic Pure AC filter is known for its effectiveness in trapping dust, pollen, mold, and pet dander. One important thing you should know about allergies is that everyone is different.

When you get tested for allergies, the doctor will make recommendations for you. The diagnosis will depend on the results based on factors like duration and amplitude of symptoms.

What we can tell you is that the Nordic Pure 16x25x1 MERV 12 pleated AC furnace filter will reduce common allergens. Remember that everyone has different symptoms and the environment where you live plays a part in your allergies.

2. AIRx ALLERGY 16x20x1 MERV 11 Pleated Air Filter

Our rating: 9 / 10

AIRx ALLERGY 16x20x1 MERV 11 Pleated Air Filter

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An air conditioner is a great investment during warm weather. The only question is: which one is right for you? If you’re looking for a quality air filter, look no further than the Airx filter.

This air filter lives up to its name. It can filter out allergens, dust, pollen, mold, and other contaminants from the air it’s filtering. On top of that, it can abate those unwanted odors from pets, cooking, etc.

Each air filter is designed to work in different types of machines, including standard units and heat pumps. They come in the following sizes – 16x20x1, 20x25x1, 24x25x1, and 20x25x1. Most systems require you to replace the filters every six months to a year, depending on the usage.

3. FilterBuy 16x24x1 MERV 8 Pleated AC Furnace Air Filter,

Our rating: 9 / 10

FilterBuy 16x24x1 MERV 8 Pleated AC Furnace Air Filter,

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If you’re looking for quality air conditioning filters in a variety of sizes, then the FilterBuy option will suit your needs. Particularly, the FilterBuy AEB-HEPA air filter option.

This filter is more than capable of supplying clean air in spaces that are up to 1,000 sq ft, and is made from fiberglass material. With an efficiency rating of up to 99.97% at 0.3 microns, you and your family can rest easy at the night knowing that your air is clean.

This air filter come with a 24x18x1” Honeycomb High-Efficiency Air Filter that works best for the air conditioning unit. This comes with its own support system, foam material, and light weight. If you’re looking to maintain the efficiency of your air conditioning unit, then we suggest you replace this filter every 3 months.

4. Honeywell Replacement Media

Our rating: 8 / 10

Honeywell Replacement Media

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  • Dust and odor reduction
  • Removes 99.97% of particles from the air through water wash
  • Ultimate germ reduction
  • Fits all air purifiers that take 16×25 size filters
  • Healthier environment for your family
  • Economical

The Honeywell FC100A1029 replacement filter can help make your home’s environment healthier and cleaner, while also saving you some money in air purifier replacements. It’ll help control odor, reduce dust, and remove allergens, mold spores, bacteria, and other harmful contaminants that are present in the air. With its specially-designed technology, this filter is capable of reducing 99.97% of particles that are let out into the air.

Because of its contamination-fighting power, it can help provide you with a healthier home. It can remove harmful allergens, dust-borne bacteria, mold spores, and other contaminants that can pose a risk to your family’s health. This smart filter can also help control unpleasant odors in your home. It’s designed to trap dirt, dust, pollen, and other particles, among others. This is very useful especially if you’re particularly sensitive to dust and other airborne particles.

5. EPAuto CP285

Our rating: 8 / 10

EPAuto CP285

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  • Competitively priced
  • Budget-friendly choice
  • No concerns about the quality of air
  • Easy to install and replace

It is a known fact that UV light can slowly kill the plates inside filters and extend their lifespan. However, they also contain biological contaminants, heavy metals, lot of dust as well as pollen, grass and mold spores. It is suggested that people with sensitivity to allergies or asthma should use their cabin air filters to avoid these contaminants.

You won’t have to worry about being able to clean your filters often because there are some that you can simply open and remove without undergoing annoying dis-assembly process.

One of the main advantages of this particular product is that it comes with activated carbon technology. This helps to trap pollen, bacteria and other undesirable pollutants to provide the driver and passengers with a cleaner air to breathe in.

6. RV Air RV AC Filter

Our rating: 8 / 10

RV Air RV AC Filter

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The RV Air Filter is available in different sizes, depending on your needs. The sizes include 1, 2, 3, 4, 6, and 8. The thickness of the filter you choose depends on your budget and the size of your air conditioner and ventilation system.

The filters are made of synthetic fibers and coated with aluminum for property absorption. These high-quality filters are designed to save on maintenance costs for your air conditioner.

They can filter out allergens, dust, mold, pet dander, pollen, and other contaminants that cause health problems. Not to mention that the filters will keep the air inside your RV fresh, clean, and smelling good.

7. Trophy Air 16x20x1 HVAC Furnace Air Filter Lasts a Lifetime

Our rating: 8 / 10

Trophy Air 16x20x1 HVAC Furnace Air Filter Lasts a Lifetime

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  • Has a 99.98% efficient MERV 16 rating
  • 30-day money-back guarantee
  • Will be able to filter more than 10 times the amount of the average furnace filter
  • Will fit all furnaces


  • A reviewer mentioned the filter being too flimsy, and that it snapped easily.

8. Filtrete 20x20x1

Our rating: 7 / 10

Filtrete 20x20x1

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  • Made in USA
  • Easy installation
  • Long lasting
  • Durable
  • Trusted brand
  • Affordable


  • Too expensive for two filters
  • Does not filter out all air particles

Our vote for best furnace filter goes to the Filtrete Micro Allergen Defense filters.

Filtrete has been around for quite a while, and their line of filters is a testament to how much their customers have loved the product for the past decades.

Since we were looking to find the best furnace filter that actually filtered out airborne pollutants and allergens, the Micro Allergen Defense filters stood out. Reviews of the Micro Allergen Defense are near-unanimous in their praise of the filters. This Filtrete product is non-allergenic and does a superb job of blocking out allergens, not just the smallest particles.

Frequently Asked Questions (FAQ)

What is the best AC filter to buy?

The Honeywell HFD-120C Micro Allergen – Furnace Air Filter is a popular choice. Because the 3-ply filter is treated with activated carbon, it is 5 times more effective at removing dust, pollen, mold spores, pet dander and other irritating airborne allergens than a standard furnace or air conditioner filter.

This carbon filter is also the only filter in the field that is guaranteed to filter 99% of common household allergens for up to 3 months. This highly effective filter is the best choice for people who suffer with allergies or for people who frequently host family gatherings where allergies could be triggered.

What is the best AC filter for air flow?

You want to make sure your air conditioner filter is sized correctly for your system. This is usually measured by the number of square feet of room it fits into. For example, if your filter is sized for a room that is about 350 sq feet that is a 4-ton AC. 2-ton units typically filter the air for a room about 550 sq feet and 0.5-ton units are the most common sized air conditioning units that are about 750 sq feet. A general rule of thumb is that you want the air filter to be about 2/3-3/4 the size of your filter (room).

Are Aerostar filters good?

If you have ever heard of a specific brand of filters, it is likely Aerostar. This brand is known for the quality of their air filters. When it comes to air filters, quality is one of the most important considerations.

Does AC filter Quality Matter?

If your AC filter is dirty and clogged, it can reduce efficiency up to 20%. High efficiency filters can be changed as much as once a month, so the product that you choose will save you money in the long term. Look for a high-quality brand, like Honeywell.


The review for the best AC filter over the past three years is based on what we think is the best overall filter. This is the filter model we use in our own home, because we’re convinced it’s the best.

Our Recommendation

Nordic Pure 16x25x1 MERV 12 Pleated AC Furnace Air Filters 6 PackBest OverallNordic Pure 16x25x1 MERV 12 Pleated AC Furnace Air Filters 6 Pack
EPAuto CP285Budget PickEPAuto CP285
Honeywell Replacement MediaUpgrade PickHoneywell Replacement Media