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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 203371 Air Cleaner Pre-Filter 2-PACK
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Retail: $79.99

Our Price: $69.95

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FiltersFast A10PR Replacement for Honeywell HC22
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Retail: $19.99

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Lennox X0587 MERV 10 Pleated Media Filter

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Retail: $59.99

As Low As: $43.45

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FiltersFast FFC20205TAB Replacement for Trion 255649-103 2-Pack

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Ships in 1 to 2 business days.

Retail: $59.99

Our Price: $49.95

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FiltersFast MERV 8 Pleated Filters 6-Pack

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Retail: $79.99

Our Price: $69.95

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GeneralAire HF500 HEPA Filter for AC500
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within the continental U.S.

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Ships in 1 business day

Retail: $149.99

Our Price: $129.95

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Lennox X4138 HEPA 40-60 Carbon PreFilter

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Retail: $48.99

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FiltersFast Replacement for GeneralAire 6FM2025 - MERV11, 20x25x5 - 2-Pack

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Ships in 1 to 2 business days.

Retail: $59.99

Our Price: $49.95

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Lennox Y6606 PCO3-14-16 Air Filtration Filter PureAir 100908-12
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within the continental U.S.


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Retail: $126.99

Our Price: $109.95

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FiltersFast 1" Air Filters MERV 8 Replacement for Rheem FPR 4 6-Pack

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Retail: $66.99

Our Price: $56.95

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BestAir A35WPR Replacement For Carrier P1103545
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Retail: $15.99

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Lennox X1152 MERV 11 Pleated Media Furnace Filter MF1-20

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Retail: $49.99

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FiltersFast A12PR Replacement for Aprilaire 12 Humidifier Filter
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FiltersFast FF16255X6670M11 Replacement for Bryant-Carrier FILXXCAR0016 MERV11 - 2-Pack

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Retail: $69.99

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Honeywell FC40R1169 14x30 Return Grille Air Filter
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Retail: $59.99

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FiltersFast E2R Replacement For Kenmore 14909 Filters 2-Pack
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GE WB02X10956 Compatible Microwave Filter

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3M Filtrete 600 MPR Pollen Air Filter (Green) 6-Pack
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within the continental U.S.

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FiltersFast FFC20265WRM8 Replacement for White Rodgers 20x26x5 F825-0549 2-Pack

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BestAir A35WPR Replacement For Trane BAYPAD02A1310A
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Lennox X8309 MERV 10 Expandable Filter Replacement

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Retail: $49.99

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Lennox X8311 MERV 10 Expandable Filter Replacement for HCXF14

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Retail: $48.99

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Honeywell 50000293-002 Post Filter for F300 2-Pack

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Retail: $69.99

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FiltersFast Replacement Bryant, Carrier FILXXFNC0021 Filter 2Pack

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FiltersFast FFC20205HONM13 Replacement for Honeywell FC100A1011, 20x20x5 2-Pack

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