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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 X0587 MERV 10 Pleated Media Filter
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Ships in 3 to 4 business days.

Retail: $80.99

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Lennox Genuine 92X10 HEPA Filter Replacement for HEPA-40, HEPA-60
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within the continental U.S.

In Stock!
Ships in 5 to 6 business days.

Retail: $349.99

Our Price: $284.99

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Aprilaire 4510, 4510-APR Replacement Air Filter - 1700, 1710A
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Retail: $49.99

Our Price: $39.99

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GeneralAire 4368 Replacement for GeneralAire 4356 Filter Media
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Retail: $49.99

Our Price: $34.99

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Lennox X1152 MERV 11 Pleated Media Furnace Filter MF1-20
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Ships in 5 to 6 business days.

Retail: $59.99

As Low As: $40.95

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Lennox 75X73 Metal Mesh Filter Catalyst Insert Assembly
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Ships in 5 to 6 business days.

Retail: $190.99

Our Price: $89.95

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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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Ships in 4 to 5 business days.

Retail: $189.95

Our Price: $129.95

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Lennox X6669 PCO-20C 21X26X4 Merv 16 Filter Replacement
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within the continental U.S.

In Stock!
Ships in 4 to 5 business days.

Retail: $169.99

Our Price: $139.95

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Lennox X5424 PMAC-20C MERV 16 25x20x6 Furnace Filter Media
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within the continental U.S.

In Stock!
Ships in 3 to 4 business days.

Retail: $179.99

Our Price: $129.95

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Filtrete Home Odor Furnace Air Filter- 20 x 20 x 1
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Retail: $29.99

Our Price: $24.95

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Filters Fast® FFC20255TABM8 Replacement for Trion AB20258 20x25x5 - 2-Pack
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Ships in 1 to 2 business days.

Retail: $50.99

Our Price: $40.95

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Lennox X4137 HEPA-20 92017-11 Carbon PreFilter Replacement
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Ships in 5 to 6 business days.

Retail: $69.99

Our Price: $46.95

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Filters Fast® FFC20205TABM8 20x20x5 Replacement for Skuttle 000-0448-003 2-Pack
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Retail: $60.99

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GeneralAire 4366 Replacement for GeneralAire 4352 - GA100A29
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Retail: $59.99

Our Price: $38.99

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Lennox X8312 HCXF16-16 MERV 16 Expandable Filter 16x25x5
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within the continental U.S.

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Ships in 4 to 5 business days.

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Filtrete Odor Reduction Air Filter - 14 x 24 x 1
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Retail: $179.99

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FiltersFast HAPF30 Replacement for Holmes HAPF30D
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Retail: $29.99

Our Price: $15.95

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GeneralAire 6FM2020 MERV 11 Replacement For GeneralAire 5FM2020
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Trion Air Bear 255649-101 Replacement For Trion Air Bear AB316258
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Retail: $34.99

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Aprilaire 261 Spacegard 2600 Filter Media Replacement
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Retail: $99.99

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Honeywell FC100A1029 Replacement for Honeywell FC35A1001 - 16x25x5
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Retail: $46.99

Our Price: $39.99

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Totaline P102-1620 16x20 MERV 11 Filter
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Retail: $46.99

Our Price: $42.99

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Totaline P102-1625 16x25 MERV 11 Filter
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Retail: $50.99

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GeneralAire 4367 Replacement for GeneralAire 4354 - GA100A11
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Retail: $49.99

Our Price: $39.99

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GeneralAire 4365 Replacement for GeneralAire 4350 MERV 10 Filter
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Retail: $41.99

Our Price: $35.99

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