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While many people worry about outdoor air quality, statistics show that they actually should be more concerned about indoor air quality (IAQ). IAQ is the measure of harmful pollutants discovered within or around your home. The EPA ranks IAQ as one of the top five public health risks.

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Air Filter FAQ

Can I use the same air filter for both heat and AC?
Which direction does the air filter go?

Always point the arrow on the box in the direction of airflow. If you are unsure the direction of airflow turn on the system fan. Do not remove the old filter before checking airflow as this might allow dirt or debris to escape.

What is air filter MERV rating?

The Minimum Efficiency Reporting Value (MERV) is used by manufacturers to explain how efficent the air filter is at trapping airborne particles. A higher MERV rating means cleaner air but reduced air flow. MERV 8 filters capture 80% of airborn particles like pollen, dust mites, mold spores, and pet dander down to 3 microns in size. MERV 11 air filters capture up to 95% of the above mentioned airborne particles down to 1 micron in size. If you choose a MERV 13 filter expect greatly diminished airflow but improved filtration of bacteria, tobacco smoke, and cooking oil down to 0.3 micorn in size. Before you choose a MERV rating check with your HVAC manufacturer to see what your system is designed to handle. Picking the wrong filter can impact air flow and reduce equipment life.

When to change the air filter in your house?

Replace your air filters every 3 months. You may need to replace your filters more frequently depending on air quality. If you are unsure about indoor air quailty check the filter monthly. If you notice the filter material is greatly discolored or noticably dirty change out the filter. Failing to replace air filters as recommened can lead to reduced system efficieny, greater energy costs, and poor air quailty.

Which air filter is best for allergies?

If you have respiratory problems caused by pollen, dust, mold, or pet dander a MERV 11 filter can help reduce the severity of aliments caused by allergies. If you are sensitive to smoke from cooking or tobacco a MERV 13 filter is recommend. For many allergy sufferers it is recommend you install filters to process both supply and return air. Before you choose a MERV rating check with your HVAC manufacturer to see what your system is designed to handle. Picking the wrong filter can impact air flow and reduce equipment life.

Which air filter is best for my home?

Your choice in air filter should depend on needs. MERV 8 filters are perfect if you have no pets and allergies are not a serious concern. MERV 11 filters are recommend for occasional allergy sufferers and homes with pets. A MERV 13 filter should be used if allergies are a serious concern and there are tobacco smokers in the house.

Where are they made?

Filtersfast brand air filters are proudly made in America. While the manufacturing location of products can vary from company-to-company, Country of Origin laws require that most products manufactured outside of America bear labeling that tells consumers where the product is made. This label should be visable on the product itself or the packaging in which it arrived.

Are the home air filters electrostatically charged?
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Air Filters full product list:


Honeywell HAC-504 Replacement Humidifier Filter

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Retail: $19.99

Our Price: $16.95

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FiltersFast FFC20256SGM13 Replacement for Aprilaire SpaceGard 2200 2250 Air Filter - MERV 13
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within the continental U.S.


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Retail: $97.99

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Carrier GAPCCCAR2420 Air Purifier Filter
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within the continental U.S.


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Retail: $119.99

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FiltersFast A10PR R Replacement for Aprilaire 10
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Retail: $19.99

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Honeywell 50000293-004 Post Filter 12.5x20 2-Pack
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Retail: $69.99

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FiltersFast FFFAPF03 Replacement for 3M Filtrete FAPF03
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Retail: $39.99

As Low As: $19.95

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Carrier EXPXXFIL0020 EZ-FLEX Air Purifier Filter
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Retail: $59.99

Our Price: $47.95

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FiltersFast FFC20256SG Replacement For Aprilaire Space Gard 2200 20x25x6 - 2-Pack

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Retail: $71.99

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FiltersFast FFC20256SGM8 Replacement for Aprilaire SpaceGard 2200 MERV8 2-Pack

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Retail: $67.99

Our Price: $49.95

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Lennox X6670 MERV 11 Pleated Filter Media-16x25x5

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Retail: $59.99

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Carrier GAPCCCAR1620 Infinity Merv 15 Air Purifier Filter
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within the continental U.S.


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Retail: $101.99

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TopTech TT-FM-2025 Techpure 20x25x4 MERV 11 Filter

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Retail: $44.99

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Lennox X6672 HCF16-16 Healthy Climate 16x25x5 MERV16 Filter
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within the continental U.S.


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Retail: $149.99

Our Price: $89.95

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Carrier EXPXXFIL0016 EZ-FLEX Air Purifier Filter
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Retail: $69.99

Our Price: $49.95

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Trion Air Bear 259112-105 Cub Filter 16x25x5 MERV 11 - 3-Pack
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within the continental U.S.

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Retail: $89.99

Our Price: $79.95

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3M Filtrete FAPF03 Replacement Air Filter Media
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Retail: $39.99

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Lennox Y6605 16x26x5 MERV 16 PureAir 100908-11 for PCO3-16-16
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Retail: $119.99

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GeneralAire 990-13 Evaporator Filter Pad - 7002
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Retail: $29.99

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AirCare 1051 Evaporative Humidifier Air Filter
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Retail: $24.99

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Lennox X6675 MERV 16 Furnace Filter Replacement for HCC20-28
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Retail: $149.99

Our Price: $129.95

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FAPF02 Air Filter, Replacement for FAP02-RS
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Retail: $30.99

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Skuttle 000-0448-001, DB-25-16 Air Cleaner Filter - 25x16x5
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Retail: $59.99

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Lennox X8788 MERV 16 PureAir Filter Replacement
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Retail: $149.99

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FiltersFast FF 30900 Replacement For Hunter 30900
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Lennox Y6608 PCO3-20-16 Healthy Climate PureAir Annual Kit
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Retail: $178.99

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