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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:


3M Filtrete FAPF03 Replacement Air Filter Media
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FiltersFast A10PR R Replacement For Aprilaire 110, 220, 500, 550, 558
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Honeywell HC-888 Replacement Humidifier Filter
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Retail: $19.99

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FiltersFast FFC20255HONM13 Replacement for Honeywell FC100A1037 - MERV 13, 2-PACK
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within the continental U.S.


In Stock!
Ships in 1 to 2 business days.

Retail: $98.99

Our Price: $79.95

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

Our Price: $49.95

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FiltersFast EF1 R Replacement For Kenmore 14410 Emerson MoistAir EF1
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Retail: $19.99

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Aprilaire 35 Replacement For Lennox X2661 Humidifier Water Panel Filter
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Retail: $24.99

Our Price: $16.95

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Lennox Y6608 PCO3-20-16 Healthy Climate PureAir Annual Kit
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within the continental U.S.


In Stock!
Ships in 2 to 3 business days.

Retail: $178.99

Our Price: $159.95

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Honeywell HRF-AP1 Replacement For Honeywell 38002
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Retail: $19.99

Our Price: $17.95

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FiltersFast Replacement for Trane 21x27x5 Perfect Fit BAYFTFR21M - 2-Pack

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Retail: $77.99

Our Price: $64.95

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FiltersFast FFC16255HONM13 Replacement for Honeywell FC100A1029 16x25x4 MERV 13

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Retail: $89.99

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BestAir A35WPR Replacement For Honeywell HC26P
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Trane Perfect Fit BAYFTAH26M2 FLR06074 MERV 8 26x21x5
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FiltersFast FFC16255TAB Trion Compatible 16x25x5, 2-Pack

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Retail: $69.99

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FiltersFast A10WPR Replacement for Aprilaire 550 Humidifier Water Panel
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Lennox X0583 16x25x5 MERV 11 Air Cleaner Media Filter

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Honeywell FC200E1029 16x25x4 MERV 13 Air Filter

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Trane BAYFTAHEXM2 Expandable Replacement Media
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FiltersFast FF 30900 Replacement For Hunter 30900
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Lennox X6667 MERV 10 Air Filter Media Replacement

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Retail: $59.99

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BestAir A35PR Replacement for Lennox WB2-17 and WB2-18 Filter
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FiltersFast FFC16205HON Replacement for Honeywell FC100A1003 MERV11, 16x20x5 - 2-Pack

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FiltersFast FFC16253TABM8 Trion 255649-101 16x25x3 Filter 3-Pack

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Trion Air Bear 259112-102 Supreme 2000 Filters 20x25x5 3-Pack
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Out of stock

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Lennox HC X6664 MERV 10 Air Filter Replacement

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Retail: $59.99

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