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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:


Lennox X7930 Furnace Filter Cabinet
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within the continental U.S.

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Ships in 4 to 5 business days.

Retail: $149.99

Our Price: $105.95

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Lennox X8349 Maintenance Kit for PCO-12C Air Cleaner
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within the continental U.S.

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Ships in 5 to 6 business days.

Retail: $226.99

Our Price: $200.95

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FiltersFast Replacement for Duracraft ACA-1010 Air Cleaner Filter
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Retail: $25.99

Our Price: $22.99

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FiltersFast R14ALLM Replacement For Kenmore 83176 2-Pack
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Retail: $24.99

Our Price: $19.95

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Lennox X8345 PureAir PCO-20C MERV 16 Upgrade Kit
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within the continental U.S.

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Ships in 2 to 3 business days.

Retail: $529.99

Our Price: $398.95

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FiltersFast A10PR R Replacement for Idylis A10-ID
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Retail: $19.99

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Lennox X5425 MERV 16 Pleated Furnace Filter Media
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within the continental U.S.

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Ships in 4 to 5 business days.

Retail: $159.99

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Aprilaire 5153 EZ Kleen Filter Replacement - 2-Pack
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Retail: $29.99

Our Price: $19.99

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Lennox Y6616 PCO3-14-16 PureAir Annual Maintenance Kit 612988-03
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within the continental U.S.

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Ships in 4 to 5 business days.

Retail: $249.99

Our Price: $198.95

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Honeywell HF100F1620  Replacement For Honeywell F100F2028
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within the continental U.S.

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Ships in 1 to 2 business days.

Retail: $199.99

Our Price: $124.95

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GeneralAire F1021, 4572 MERV 13 16x25x4 Media Filter
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within the continental U.S.

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Ships in 5 to 6 days.

Retail: $129.99

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Lennox X8303 MERV 10 Expandable Filter Kit
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Retail: $109.99

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Lennox X8307 MERV 16 Expandable Filter Kit
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within the continental U.S.

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Ships in 4 to 5 business days.

Retail: $219.99

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FiltersFast R14ALLM Replacement For Shop-Vac 8017062 2-Pack
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Retail: $24.99

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Filtrete 1 Inch Carbon Odor Air Filter 14 x 25 x 1 4-Pack
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within the continental U.S.

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Ships in 5 to 6 days.

Our Price: $99.80

GeneralAire GA23 Humidifier Vapor Pad Replacement Part 7923
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within the continental U.S.

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Ships in 5 to 6 days.

Our Price: $149.90

Totaline P102-2020 20x20 MERV 11 Filter
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Retail: $49.99

Our Price: $44.99

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Carrier 356066-1201 Charcoal Filter EACBAXCC0020
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within the continental U.S.

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GE WB02X10700 Compatible Oven Range Hood Filter
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Retail: $24.99

Our Price: $17.95

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Lennox X8346 PureAir PCO-12C MERV 16 Maintenance Kit 17x26x4
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within the continental U.S.

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Retail: $279.99

Our Price: $219.95

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Lennox LB-71461 Media Filter 36-in x 20-ft - 30025
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Retail: $120.99

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Honeywell F300E1001 16x20 Electronic Air Cleaner
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Retail: $999.99

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Lennox 98N43 MERV 8 Pleated Furnace Filter 4-Pack
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Retail: $79.99

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Lennox X8344 PureAir PCO-20C MERV 16 Upgrade Kit
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within the continental U.S.

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Retail: $349.99

Our Price: $279.95

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Lennox Y2921, HCC16-28 Filter Cabinet System MERV 16
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within the continental U.S.

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Ships in 5 to 6 business days.

Retail: $400.99

Our Price: $300.99

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