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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:


FiltersFast Trane Perfect Fit BAYFTAH26M 21x26x5 2pk
(FFC26215TRN)

These FiltersFast MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTAH26M, which is a 21x26x5 Air Filter used in several Trane Air Cleaner

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FiltersFast Trane Perfect Fit BAYFTAH26M 21x26x5 2pk
Our Price: $94.00
Retail: $199.99
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Honeywell Enviracaire HC26A 1008 Humidifier Pad
(HC26A 1008)

The Honeywell Enviracaire Elite HC26A 1008 Humidifier Pad replaces the humidifier pad in the Honeywell HE260A,B Bypass Flow-Through Humidifier, HE360A1019, HE360B1009 Powered Flow-Through Humidifier or Aprilaire 560 and 760 humidifiers.


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Honeywell Enviracaire HC26A 1008 Humidifier Pad
As Low As: $13.49
Retail: $15.21
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Trion 255649-103 Air Bear Media Filter 20x20x5
(255649-103)

Fight air quality problems around your home with the Trion Air Bear 255649-103 replacement air filter media. The 20x20x5 deep pleated design offers greater surface area for a higher capture of airborne particles that contribute to allergies.


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Trion 255649-103 Air Bear Media Filter 20x20x5
As Low As: $28.45
Retail: $35.00
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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: $29.95
Retail: $39.99
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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: $101.95
Retail: $119.99
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TopTech TT-FM-1625 Techpure 16x25x4 MERV 11 Filter
(TT-FM-1625)

The TopTech TT-FM-1625 Techpure 16x25x4 MERV 11 Filter removes many allergens, dust, pollen and other airborne pollutants.


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TopTech TT-FM-1625 Techpure 16x25x4 MERV 11 Filter
Our Price: $33.95
Retail: $45.99
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Carrier GAPCCCAR2420 Air Purifier Filter
(GAPCCCAR2420)

The Carrier GAPCCCAR2420 Air Purifier Filter is a genuine OEM factory replacement air filter for the Carrier Infinity Air Purifier, Bryant Perfect Air Purifier, as well as other compatible air purifiers made by BDP, Payne, Day and Night Infinity

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Carrier GAPCCCAR2420 Air Purifier Filter
As Low As: $78.95
Retail: $119.99
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BestAir R14ALLM Universal Cut to Fit Carbon Pre Filter-2-Pack
(R14ALLM)

The Universal Cut to Fit Carbon Pre Filter-2 Pack is a replacement pack of two carbon pre-filters that fit a variety of air purifiers and air cleaners, including models from Bionaire, DeLonghi, Duracraft, Holmes, Honeywell Enviracare, Hunter QuietFl


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BestAir R14ALLM Universal Cut to Fit Carbon Pre Filter-2-Pack
Our Price: $17.99
Retail: $19.99
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FiltersFast Brand 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 Brand Trane 21x21.5x5 BAYFTAH21M FLR06072 2-Pack
Our Price: $49.95
Retail: $70.00
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Lennox X0583 MERV 11 Air Cleaner Media Filter
(X0583)

This Lennox X0583 MERV 11 Air Cleaner Media Filter needs to be replaced every 6 months. The Lennox Furnace Filter Media is an excellent filter for someone who wants a significant upgrade over standard fiberglass filters from the hardware store.


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Lennox X0583 MERV 11 Air Cleaner Media Filter
Our Price: $35.95
Retail: $104.00
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GeneralAire GA19 Humidifier Vapor Pad Replacement
(7919)

The GeneralAire GA19 Humidifier Vapor Pad Replacement is a replacement vapor pad for the GeneralAire Elite Models 900 and 1000. Air passes through the GA19 vapor pad where moisture is absorbed into the heating system after which the home is humidifi


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GeneralAire GA19 Humidifier Vapor Pad Replacement
As Low As: $10.99
Retail: $17.84
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FiltersFast Brand Honeywell FC100A1003 16x20x5, 2-Pack
(FFC16205HON)

The FiltersFast FFC16205HON 2 pack compatible air filters replaces the Honeywell FC100A1003 and provides an array of solutions for contaminated indoor air.


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FiltersFast Brand Honeywell FC100A1003 16x20x5, 2-Pack
Our Price: $50.95
Retail: $59.95
You Save 15%!

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FiltersFast Brand 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 Brand Trane Perfect Fit BAYFTAH21M 21.5x21x5 (2 Pack)
Our Price: $59.95
Retail: $99.00
You Save 39%!

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FiltersFast Trane Perfect Fit BAYFTFR17M 17.5x27x5 2pk
(FFC175275TRN)

These MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTFR17M or FLR06069, which is a 17.5x27x5 Air Filter used in several Trane Air Cleaner.


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FiltersFast Trane Perfect Fit BAYFTFR17M 17.5x27x5 2pk
Our Price: $70.99
Retail: $99.99
You Save 29%!

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Honeywell HC-14 Replacement Humidifier Filter Wick
(HC-14)

The Honeywell HC-14 Humidifier Filter Replacement reduces waterborne minerals and contaminants to keep your humidifier clean.


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Honeywell HC-14 Replacement Humidifier Filter Wick
Our Price: $24.99
Retail: $25.99
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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.


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Carrier Bryant 49BF Humidifier Filter Replacement
Our Price: $29.49
Retail: $34.99
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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: $55.99
Retail: $69.99
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Lennox X0445 MERV 10 PMAC-20C Pleated Furnace Filter Media
(X0445)

This Lennox X0445 MERV 10 PMAC-20C Pleated Furnace Filter Media is a part of the Lennox “Healthy Climate” line of indoor air quality products. This Lennox Healthy Climate Filter is an expandable media air filter.


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Lennox X0445 MERV 10 PMAC-20C Pleated Furnace Filter Media
Our Price: $32.95
Retail: $35.95
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Honeywell HAC-700 Humidifier Filter B 2-Pack
(HAC-700)

This Honeywell HAC-700 humidifier filter eliminates minerals and pollutants from water and helps keep your humidifier clean and pure. This Honeywell humidifier filter has a ProTec AntiMicrobial Treatment, which helps to prevent bacteria.


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Honeywell HAC-700 Humidifier Filter B 2-Pack
As Low As: $14.55
Retail: $19.95
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FiltersFast A35WPR Replacement For Honeywell HC26P
(Honeywell HC26 R)

The Honeywell HC26 Humidifier Water Panel Filter is a replacement humidifier water panel filter that fits several Honeywell furnace humidifier models. This evaporator pad measures approximately 10" x 13.25" x 1.5" and features anti-microbial furna


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FiltersFast A35WPR Replacement For Honeywell HC26P
As Low As: $11.45
Retail: $14.99
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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: $40.95
Retail: $49.99
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Lennox X6672 HCF16-16 Healthy Climate 16x25x5 MERV16 Filter
(X6672)

The Lennox X6672 HCF16-16 Healthy Climate 16x25x5 MERV 16 Filter Replacement is a replacement air filter for the Lennox HCC16028 Healthy Climate True Fit Cabinet. This furnace filter measures approximately 16x25x5 and features a MERV 16 rating for


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Lennox X6672 HCF16-16 Healthy Climate 16x25x5 MERV16 Filter
Our Price: $71.95
Retail: $149.95
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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: $10.75
Retail: $22.99
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Trane BAYFTFREXM2 FLR06232 Expandable Replacement-2-Pack
(BAYFTFREXM2)

The Trane BAYFTFREXM2 FLR06232 Expandable Replacement Media is a pair of furnace air filters that can only be used with a Retrofit Frame Kit already installed. This Trane air filter measures approximately 25" in length x 5" in thickness.


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Trane BAYFTFREXM2 FLR06232 Expandable Replacement-2-Pack
Our Price: $60.95
Retail: $69.99
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Honeywell FC40R1029 20x30x3 Return Grille Filter
(FC40R1029)

The Honeywell FC40R1029 is a high-efficiency, replacement filter for return grille applications that will capture airborne particles as small as 0.3 microns in size.


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Honeywell FC40R1029 20x30x3 Return Grille Filter
Our Price: $47.95
Retail: $74.81
You Save 36%!

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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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