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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:


BestAir D19-C Replacement for Honeywell HC-819 Humidifier Filter
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FiltersFast FFC16265WRM8 Replacement for White Rodgers 16x26x5 F825-0548 - 2-Pack

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Hunter 30901 Carbon Purifier Pre-Filter
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FiltersFast HAPF30 Replacement for Holmes HAPF30D
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BestAir D19-C Replacement for Honeywell HC-818 Humidifier Filter
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FiltersFast 1" Air Filters MERV 8 Replacement for Nordic Pure MERV 8 6-Pack

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FiltersFast 1" Air Filters MERV 13 Replacement for Nordic Pure  1" MERV 12 6-Pack

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Honeywell FC40R1110 Return Grille Air Filter 14X20x3

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FiltersFast FFC175275TRN M13 Replacement for Trane Perfect Fit 17.5x27x5 MERV13 - 2-Pack
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Trion Air Bear Media AC Filter 20x20x5 4-Pack
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FiltersFast FFC16253TAB Replacement for Trion 259112-101 3-Pack

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Honeywell FC40R1037 12x24 Return Air Grille Filter

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BestAir 24000 Replacement for Honeywell 24000
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Honeywell TRN2321T1 Replacement for Trane BAYFTAH23M, 23.5x21x5 Perfect Fit - 3-Pack
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GeneralAire 4401 13415 MERV 11 Filter Media for AC-4
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Lennox X0444 MERV 10 Pleated Furnace Filter Media PMAC-12C

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Lennox 75X66 Genuine Metal Mesh Insert Fits PureAir Model PCO-2OC
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Lennox Genuine 92X10 HEPA Filter Replacement for HEPA-40, HEPA-60
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Lennox Y6616 PCO3-14-16 PureAir Annual Maintenance Kit 612988-03
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Aprilaire 4897 Conversion Frame for Model 5000
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BestAir R14ALLM Replacement For Honeywell HRF-AP1 2-Pack
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FiltersFast FFC21275TRNM13 Replacement for Trane BAYFTFR21M, 21x27x5 Perfect Fit - MERV13, 2-Pack
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FilterFast FFC215215TRNM13 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - MERV13, 2-Pack
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Lennox X8312 HCXF16-16 MERV 16 Expandable Filter 16x25x5
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Aprilaire 1413 Air Filter Performance Upgrade Kit
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