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Air Filter Shield

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?

Yes, both AC filters and furnace filters are the same thing. We categorize filters based on their intended use to make filter shopping easier for the customer. During the summer months you are more likely to search for AC filters. While during colder winter months you are looking to buy furnace filters. A good tip for remembering when to change your filters is to replace them at the start of each new season.

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?

Yes, Filtersfast, Filtrete, Carrier, among many other air filter brands use an electrostatically charged filter media. Fiberglass air filters are far less common today and were never designed to improve air quality, rather they protect HVAC systems from large dirt and debris.


Air Filters full product list:


Lennox Y6608 PCO3-20-16 Healthy Climate PureAir Annual Kit
(Y6608)

Lennox Y6608 PCO3-20-16 Healthy Climate PureAir Annual Maintenance Kit.

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Lennox Y6608 PCO3-20-16 Healthy Climate PureAir Annual Kit
Our Price: $148.95
Retail: $178.99
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Honeywell 50000293-002 Post Filter for F300 2-Pack 2-Pack
(50000293-002)

The Honeywell 50000293-002 is the correct replacement for the following air cleaners: Honeywell F300 Series Honeywell F50F Series Honeywell F58F Series The Honeywell 50000293-002 Post Filter for F50F & F300 measures 16 inches by 12 1/2 inche


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Honeywell 50000293-002 Post Filter for F300 2-Pack
Our Price: $44.08

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Lennox X8348 PCO-20C MERV 10 Filter Maintenance Kit
(X8348)

The Lennox X8348 MERV 10 Filter Maintenance Kit is a maintenance kit for the Lennox PCO-20C PureAir Air Purification System. This PureAir maintenance kit includes: one MERV 10 filter, also known as part number X6667; one catalyst insert, also known

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Lennox X8348 PCO-20C MERV 10 Filter Maintenance Kit
Our Price: $228.95
Retail: $354.99
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GeneralAire 4368 Replacement for GeneralAire 4356 - GA100A37
(4356)

The GeneralAire GA100A37 MERV10 Filter Media measures 20"x25”x4" approx., and is the correct replacement filter for Source 1 S1 MAC 10202505, Trion Air Bear Supreme 2000, Skuttle DBO-0025-020, Ultravation 90-007 & Honeywell FC100A1037 Air Cleaners.


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GeneralAire 4368 Replacement for GeneralAire 4356 - GA100A37
Our Price: $31.99
Retail: $39.99
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Honeywell FC40R1102 Return Grille Filter-14x14x3
(FC40R1102)

The Honeywell FC40R1102 is a high-efficiency, replacement air filter for return grille applications. Designed to capture airborne particles that circulate through the AC filter. Nominal Dimension 14x14x4. Genuine Honeywell Part.


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Honeywell FC40R1102 Return Grille Filter-14x14x3
As Low As: $32.10
Retail: $44.99
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BestAir A10WPR Replacement for Aprilaire 550 Humidifier Water Panel
(A10WPR)

The BestAir A10WPR fits Aprilaire, Chippewa, Hamilton, Honeywell, Lasko, Totaline, Healthy Climate and Lennox Humidifier systems.


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BestAir A10WPR Replacement for Aprilaire 550 Humidifier Water Panel
Our Price: $15.99
Retail: $19.99
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BestAir 24000 R Replacement for Honeywell 24000
(24000)

The BestAir 24000 R HEPA Air Filter is the compatible replacement for the Honeywell 24000 HEPA Air Filter.


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BestAir 24000 R Replacement for Honeywell 24000
Our Price: $56.99
Retail: $69.99
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FiltersFast FFC16253TABM13 Replacement for Trion 16x25x3 Air Bear MERV13 3-Pack
(FFC16253TABM13)

The FiltersFast Brand Trion 16x25x3 Air Bear MERV13 3-Pack Filter is a compatible version of the genuine Trion Air Bear Media AC Filter 16x25x3, 255649-101.


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FiltersFast FFC16253TABM13 Replacement for Trion 16x25x3 Air Bear MERV13 3-Pack
Our Price: $84.00
Retail: $99.99
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FiltersFast 1" Air Filters MERV 13 Replacement for Aerostar 1" MERV 13 6-Pack
(FFM13 6pk AS)

The FiltersFast 1" Air Filters MERV 13 6-Pack is the compatible replacement for the Aerostar 1" MERV 13 Air Filters.


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FiltersFast 1" Air Filters MERV 13 Replacement for Aerostar 1"  MERV 13 6-Pack
Our Price: $59.95
Retail: $70.99
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3M Filtrete 600 MPR Pollen Air Filter (Green) 6-Pack
(Dust and Pollen 6-Pk)

The 3M Filtrete Dust & Pollen Furnace Filter is an electrostatically charged furnace filter ideal for high velocity HVAC systems. 3M Filtrete filters are an economical upgrade from cheap one month filters.


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3M Filtrete 600 MPR Pollen Air Filter (Green) 6-Pack
Our Price: $62.25
Retail: $73.99
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Honeywell TRN2321T1 Replacement for Trane BAYFTAH23M, 23.5x21x5 Perfect Fit - 3-Pack
(TRN2321T1)

These three Honeywell air filters are compatible furnace filters that can be used as upgrades over the Trane Perfect Fit filter of the same size. Genuine Trane Perfect Fit filters have only a MERV 8 rating, while these compatible Honeywell furnace f

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Honeywell TRN2321T1 Replacement for Trane BAYFTAH23M, 23.5x21x5 Perfect Fit - 3-Pack
Our Price: $149.00
Retail: $175.99
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Honeywell Enviracaire HC22A1007 Filter - HE220a
(HC22A 1007)

The Honeywell Enviracaire Elite HC22A 1007 Humidifier Pad replaces the humidifier pad in the Honeywell HE220A,B Bypass Flow-Through Humidifier or Aprilaire 550 Humidifier. Genuine Honeywell part.


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Honeywell Enviracaire HC22A1007 Filter - HE220a
Our Price: $12.99
Retail: $15.99
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Lennox 75X66 Genuine Metal Mesh Insert Fits PureAir Model PCO-2OC
(75X66)

The Lennox 75X66 Metal Mesh Filter is the correct replacement for the following air cleaner: Lennox Pureair PCO-2OC

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Lennox 75X66 Genuine Metal Mesh Insert Fits PureAir Model PCO-2OC
Our Price: $99.95
Retail: $199.99
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FiltersFast ROHAPF60M Replacement For Holmes HAPF60 Pre-Filter 2-Pack 2-Pack
(HAPF60)

The Holmes HAPF60 Carbon Pre-Filter 4-Pack fits Holmes HAP615, HAP625, HAP650, HAP675, and others. In an average household 1 Pre-filter will last 3 months--order your year supply today!


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FiltersFast ROHAPF60M Replacement For Holmes HAPF60 Pre-Filter 2-Pack
Our Price: $19.90

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FiltersFast FFC16265WRM8 Replacement for White Rodgers 16x26x5 F825-0548 - 2-Pack
(F825-0548-M8)

If you are looking for a FiltersFast Brand economical compatible alternative for the OEM White Rodgers 16x26x5 Air Furnace Filter try this White Rodgers 16x26x5 Furnace Filter Replacement F825-0548.


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FiltersFast FFC16265WRM8 Replacement for White Rodgers 16x26x5 F825-0548 - 2-Pack
Our Price: $34.95
Retail: $59.99
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BestAir A35PR Replacement for Lennox WB2-17 and WB2-18 Filter
(WB2-17 WB2-18)

The BestAir A35PR is the compatible replacement filter for the Lennox WB2-17 and WB2-18 Humidifier Metal Water Panel Filter.


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BestAir A35PR Replacement for Lennox WB2-17 and WB2-18 Filter
As Low As: $7.95
Retail: $11.99
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Lennox X4138 HEPA 40-60 Carbon PreFilter
(X4138)

This Lennox X4138 HEPA 40-60 Carbon PreFilter is a part of the Lennox “Healthy Climate” line of indoor air quality products. This Lennox HEPA 60 filter has an estimated life of 6 months.


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Lennox X4138 HEPA 40-60 Carbon PreFilter
Our Price: $31.95
Retail: $38.99
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FiltersFast A10PR R Replacement for American Standard BAYPAD01A1010A
(BAYPAD01A1010A R)

The American Standard BAYPAD01A1010A is the compatible replacement for the following humidifier: American Standard HUMD200A Humidifier American Standard HUMD200T Humidifier


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FiltersFast A10PR R Replacement for American Standard BAYPAD01A1010A
As Low As: $6.99
Retail: $12.99
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Honeywell FC40R1045 14x25 Return Air Grille Filter
(FC40R1045)

Honeywell FC40R1045 14x25 Return Air Grille AC Filter is a high efficiency, replacement for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 14x25x4. Genuine Honeywell Part.


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Honeywell FC40R1045 14x25 Return Air Grille Filter
Our Price: $29.99
Retail: $44.99
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Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1
(BAYFTFR21P4A)

The Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1 fits several air cleaner models made by Trane. This Trane furnace filter measures approximately 21" x 27" x 1" and has pleats for the purification of your indoor air. This Trane Perfect Fit filter


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Trane Perfect Fit BAYFTFR21P4A Filter - 21x27x1
Our Price: $21.90
Retail: $25.99
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GeneralAire F1020 MERV 13 Filter Media Replacement
(4562)

The General Air F1020 MERV 13 Filter Media measures 20"x25"x4" (approx.), and is correct filter for General Aire TERSus2000 Air Purification Systems.


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GeneralAire F1020 MERV 13 Filter Media Replacement
Our Price: $63.91
Retail: $75.99
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BestAir A35WPR Replacement For Carrier P1103545
(Carrier P1103545 R)

The Carrier P1103545 Humidifier Water Panel Filter is the correct compatible replacement for: Several models of Carrier furnace humidifiers This humidifier water panel filter measures approximately 10" x 13 1/4" x 1 1/2". This Carrier water pa


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BestAir A35WPR Replacement For Carrier P1103545
As Low As: $11.45
Retail: $15.99
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FiltersFast HAPF30 R Replacement for Holmes HAPF30AT-U4
(HAPF30)

The Holmes HAPF30 Replacement HEPA filter fits Holmes Air Purifier Models HAP240, HAP242, HAP243, HAP2400, HAP2404, HAP260, HAP2604, HAP412, HAP413, HAP422, HAP433 and Bionaire BAP242, BAP422, BAP815, BAP825, and BAP826.


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FiltersFast HAPF30 R Replacement for Holmes HAPF30AT-U4
Our Price: $16.24
Retail: $29.99
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FilterFast FFC215215TRNM13 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - MERV13, 2-Pack
(FFC215215TRNM13)

The FilterFast Brand Trane 21.5x21x5 Perfect Fit Filter BAYFTAH21M, FLR06072, BAYFTAH21M2 is a compatible economical alternative for the genuine Trane 21.5x21x5 Perfect Fit Filter that comes in a 2-pack value set.


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FilterFast FFC215215TRNM13 Replacement for Trane BAYFTAH21M, 21.5x21x5 Perfect Fit - MERV13, 2-Pack
Our Price: $69.95
Retail: $139.99
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Honeywell FC200E1011 Media Filter 20x20x5- Merv 13
(FC200E1011)

The Honeywell FC200E1011 Media Filter 20x20x5- Merv 13 is a replacement air filter for the Honeywell 20X20 F100 and F200 media air cleaners. This Honeywell air filter boasts a MERV 13 rating and removes over 97% of 3 to 10 micron particles from indo


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Honeywell FC200E1011 Media Filter 20x20x5- Merv 13
Our Price: $46.99
Retail: $55.99
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Filters Fast - Air Filters

" I just received my filters - thank you for the excellent work that you guys do! I'm a very happy customer. " - Mike, San Marcos, TX
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