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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:


Trane Perfect Fit BAYFTAH23M2 21"x23.5"x5"
(BAYFTAH23M2)

The Trane Perfect Fit BAYFTAH23M2 23.5x21x5 Air Filter is a replacement air filter for the Trane model BAYFRAME215A and TFM215A0AH1 air cleaners. The Trane Perfect Fit filter measures approximately 23.5" x 21" x 5" and features a MERV 8 rating.


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Trane Perfect Fit BAYFTAH23M2  21"x23.5"x5"
As Low As: $46.95
Retail: $69.99
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BestAir A35PR Replacement for Carrier P1103545
(Carrier P1103545 1R)

The BestAir A35PR evaporator pad has a honeycomb-shaped filtration media that is designed to trap mineral pollutants and contaminants found in your water.


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BestAir A35PR Replacement for Carrier P1103545
As Low As: $9.95
Retail: $14.99
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FiltersFast FFC20205TABM8 Replacement For Trion MERV 8 Filter 20x20x5 2-Pack
(FFC20205TABM8)

The Trion FFC20205TABM8 20x20x5 MERV 8 Compatible Air Bear Furnace Filter replacement is an economical alternative for the OEM - Trion 255649-103 Air Bear Media Filter 20x20x5.


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FiltersFast FFC20205TABM8 Replacement For Trion MERV 8 Filter 20x20x5 2-Pack
Our Price: $39.95
Retail: $59.99
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GeneralAire 6FM1625 MERV 11 Replacement for GeneralAire 5FM1625
(4511)

The GeneralAire 6FM1625 MERV 11 Filter Media Cartridge measures 16x25x5 and fits the GeneralAire MAC14000, GeneralAire MAC1400M, and Trion AirBear Supreme 1400 models of air cleaners.


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GeneralAire 6FM1625 MERV 11 Replacement for GeneralAire 5FM1625
As Low As: $28.95
Retail: $39.99
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Lennox X6667 MERV 10 Air Filter Media Replacement
(X6667)

The Lennox X6667 MERV 10 Air Filter Media Replacement is a replacement air filter for Lennox Healthy Climate PureAir PCO-20C air cleaners. This box media utilizes a MERV 10 pleated filter that captures particles as small as 0.3 microns in size.


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Lennox X6667 MERV 10 Air Filter Media Replacement
Our Price: $49.95
Retail: $59.99
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FiltersFast A10PR R Replacement For Aprilaire 110, 220, 500, 550, 558
(A10PR R)

The FiltersFast A10PR R is the correct replacement filter for Aprilaire Humidifier Models 110, 220, 500, 550, 558.


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FiltersFast A10PR R Replacement For Aprilaire 110, 220, 500, 550, 558
As Low As: $8.95
Retail: $19.99
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FiltersFast EF1 R Replacement For Kenmore 14410 Emerson MoistAir EF1
(EF1 R)

The EF1 R is the correct replacement for the Kenmore EF1-EF21 14410 Emerson MoistAir MAF 1 Filter.


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FiltersFast EF1 R Replacement For Kenmore 14410 Emerson MoistAir EF1
As Low As: $12.99
Retail: $19.99
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FiltersFast FFC215215TRNM8 Replacement for Trane 21x21.5x5 BAYFTAH21M FLR06072 2-Pack
(FFC215215TRNM8)

This FiltersFast Filter for Trane 21x21.5x5 BAYFTAH21M 2 Pack Model FLR06072 and BAYFTAH21M2 is an economical compatible version of the genuine OEM Trane Perfect Fit 21.5x21x5 Filter.


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FiltersFast FFC215215TRNM8 Replacement for Trane 21x21.5x5 BAYFTAH21M FLR06072 2-Pack
As Low As: $45.95
Retail: $69.99
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TopTech TT-FM-2025 Techpure 20x25x4 MERV 11 Filter
(TT-FM-2025)

The TopTech TT-FM-2025 QwikBox 20x25x4 MERV 11 Filter removes many allergens, dust, pollen and other airborne pollutants.


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TopTech TT-FM-2025 Techpure 20x25x4 MERV 11 Filter
As Low As: $34.95
Retail: $44.99
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Skuttle 000-0448-001, DB-25-16 Air Cleaner Filter - 25x16x5
(000-0448-001)

Skuttle 000-0448-001 Air Cleaner Filters measure 25"x16"x5", & effectively reduce airborne particles such as pet dander, mold spores, dust, dust mites, pollen and other allergens from your indoor environment.


Out of stock
Skuttle 000-0448-001, DB-25-16 Air Cleaner Filter - 25x16x5
Our Price: $49.95
Retail: $59.99
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FiltersFast DU3-C Replacement for Honeywell HAC-801 - 3-Pack
(DU3-C)

The FiltersFast DU3-C Replacement for Honeywell HAC-801 Filter for cool moisture humidifiers removes minerals and pollutants from water.


This item has been discontinued. Please review the product description for more information.
FiltersFast DU3-C Replacement for Honeywell HAC-801 - 3-Pack
Our Price: $14.95
Retail: $19.99
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Honeywell 50000293-004 Post Filter 12.5x20 2-Pack
(50000293-004)

The Honeywell 50000293-004 Post Filter 12.5x20 2-Pack is a replacement post filter for the 20x25 and 20x12.5 F300E and F50F air cleaners. The Honeywell post filter increases the efficiency of your Honeywell electronic air purifier model and has only


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Honeywell 50000293-004 Post Filter 12.5x20 2-Pack
As Low As: $49.95
Retail: $69.99
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Carrier Bryant 49BF Humidifier Filter Replacement
(318518-761)

The Carrier Bryant 49BF Humidifier Filter Replacement is also known as Carrier Bryant 318518-761.


Out of stock
Carrier Bryant 49BF Humidifier Filter Replacement
Our Price: $35.95
Retail: $41.95
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FiltersFast FFC20255HONM13 Replacement for Honeywell FC100A1037 - MERV 13, 2-PACK
(FFC20255HONM13)

FiltersFast Brand Honeywell FC100A1037 MERV 13 2-PACK is a compatible media air filter with a MERV 13 energy efficiency rating. This replacement filter is also known as part number FFC20255HONM13.

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FiltersFast FFC20255HONM13 Replacement for Honeywell FC100A1037 - MERV 13, 2-PACK
Our Price: $79.95
Retail: $98.99
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Lennox X0586 MERV 11 Pleated Media Filter
(X0586)

This Lennox X0586 MERV 10 Pleated Media Filter is a genuine MERV 10 filter offering efficient and effective filtration. This Lennox Pleated Furnace Filter only needs to be replaced every 6 months.


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Lennox X0586 MERV 11 Pleated Media Filter
As Low As: $39.95
Retail: $49.99
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Aprilaire 35 Replacement For Lennox X2661 Humidifier Water Panel Filter
(X2661)

Keep your cool mist humidifier operating effectively with the Aprilaire 35 Replacement For Lennox X2661 replacement water panel humidifier filter pad.


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Aprilaire 35 Replacement For Lennox X2661 Humidifier Water Panel Filter
Our Price: $16.95
Retail: $24.99
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Lennox X8788 MERV 16 PureAir Filter Replacement
(X8788)

The Lennox X8788 MERV 16 filter is made for your PureAir PC020-28 unit. Also known as a healthy climate filter, this pleated filter will remove harmful airborne contaminants from your home. If you or your family members suffer from asthma or allergi

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Lennox X8788 MERV 16 PureAir Filter Replacement
Our Price: $119.95
Retail: $149.99
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Lennox X0583 16x25x5 MERV 11 Air Cleaner Media Filter
(X0583)

This Lennox X0583 16x25x5 MERV 11 Air Cleaner Media Filter needs to be replaced every 6 months.


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Lennox X0583 16x25x5 MERV 11 Air Cleaner Media Filter
Our Price: $44.95
Retail: $59.99
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GeneralAire 12758 MERV 11 Filter Media Replacement
(4001)

The GeneralAire 12758 MERV 11 Filter Media Replacement is a replacement air filter for the GeneralAire AC1 and AC22 model air cleaners. This replacement filter media features a MERV 11 rating and Micro Fiber construction for the reduction of airborn


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GeneralAire 12758 MERV 11 Filter Media Replacement
As Low As: $40.95
Retail: $64.99
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FiltersFast FFC215215TRN Replacement for Trane Perfect Fit BAYFTAH21M 21.5x21x5 (2-Pack)
(FF-BAYFTAH21M)

These MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTAH21M, BAYFTAH21M2 or FLR06072.


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FiltersFast FFC215215TRN Replacement for Trane Perfect Fit BAYFTAH21M 21.5x21x5 (2-Pack)
As Low As: $60.95
Retail: $98.99
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Lennox HC X6664 MERV 10 Air Filter Replacement
(X6664)

The Lennox HC X6664 MERV 10 Air Filter Replacement is a replacement air filter for the Lennox PCO-12C PureAir air cleaner. This pleated air filter features a MERV 10 rating and can trap airborne particulates down to as small as 0.3 microns.


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Lennox HC X6664 MERV 10 Air Filter Replacement
Our Price: $39.95
Retail: $59.99
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Trane Perfect Fit BAYFTAH26M2 FLR06074 MERV 8 26x21x5
(BAYFTAH26M2A)

The Trane / American Standard Perfect Fit BAYFTAH26M2 FLR06074 26x21x5 is a furnace air filter that fits several high efficiency air cleaners from Trane and American Standard.


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Trane Perfect Fit BAYFTAH26M2 FLR06074 MERV 8 26x21x5
As Low As: $51.95
Retail: $69.99
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Trane BAYFTAHEXM2 Expandable Replacement Media
(BAYFTAHEXM2)

The Trane BAYFTAHEXM2 Expandable Replacement Media is a set of two furnace air filters that require the use of a Retrofit Frame Kit to be operable. This Trane Perfect Fit filter measures approximately 20 inches in length and 5 inches in thickness. T


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Trane BAYFTAHEXM2 Expandable Replacement Media
As Low As: $58.95
Retail: $79.99
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FiltersFast MERV 8 Pleated Filters 6-Pack
(FFM8Pleat)

With an initial pressure drop of around .17, these FiltersFast 2" MERV 8 Pleated Panel Filters are comparable to or an upgrade over such other pleat filters as the American Air or AmAir PerfectPleat, the Airguard Xtreme Pleated Panel Filters


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FiltersFast MERV 8 Pleated Filters 6-Pack
Our Price: $64.95
Retail: $89.99
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Aprilaire 12 Replacement Water Panel
(Aprilaire 12)

This is an Aprilaire 112 & 445 Humidifier Water Panel Evaporator for the Aprilaire 440 Humidifier, Aprilaire 445 Humidifier, Aprilaire 445A Humidifier, Aprilaire 448 Humidifier, Aprilaire 112 Humidifier, and Aprilaire 224 Humidifier. The Aprilaire w


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Aprilaire 12 Replacement Water Panel
As Low As: $16.95
Retail: $24.99
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Filters Fast - Air Filters

" Thank you for your expert service when helping me get the proper filters for my old pool and filter system. The new ones are perfect and work very well. All the best! " - Jim, Alamo, CA
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