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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 BAYFTAH21M2 Replacement Air Filter 21.5x21x5
(BAYFTAH21M2)

The Trane BAYFTAH21M2 Replacement Air Filter 21.5x21x5 fits the TFM215B0AH0 Perfect Fit High Efficiency Air Cleaner. This Trane Perfect Fit filter has a MERV 8 rating that helps purify your air and improve overall indoor air quality. Measuring appro


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Trane BAYFTAH21M2 Replacement Air Filter 21.5x21x5
As Low As: $43.95
Retail: $49.99
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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 for t


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Trane Perfect Fit BAYFTAH23M2  21"x23.5"x5"
As Low As: $43.99
Retail: $50.99
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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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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 Trane Perfect Fit BAYFTAH21M 21.5x21x5 2pk
(FFC215215TRN)

These MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTAH21M or FLR06072, which is a 21.5x21x5 Air Filter used in several Trane Air Cleaners

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FiltersFast Trane Perfect Fit BAYFTAH21M 21.5x21x5 2pk
Our Price: $99.00

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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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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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Lennox HC X6664 MERV 11 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 11 Air Filter Replacement
Our Price: $33.95
Retail: $49.00
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FiltersFast Brand Trane 21x27x5 Perfect Fit BAYFTFR21M
(FFC21275TRNM8)

The FiltersFast Brand Trane 21x27x5 Perfect Fit BAYFTFR21M Filter is an economical compatible alternative to the genuine OEM Trane 21x27x5 Perfect Fit BAYFTFR21M Filter.


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FiltersFast Brand Trane 21x27x5 Perfect Fit BAYFTFR21M
Our Price: $66.00
Retail: $70.00
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Top Tech DTT-FM-1620 16x20x4 MERV 11 Filter
(DTT-FM-1620)

The Top Tech DTT-FM-1620 16" x 20" x 4" MERV 11 Filter removes many allergens, dust, pollen and other airborne pollutants.


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Top Tech DTT-FM-1620 16x20x4 MERV 11 Filter
Our Price: $30.99
Retail: $39.99
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FiltersFast A10PR R Replacement for 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 BAYPAD01A1010A
As Low As: $6.99
Retail: $10.99
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Lennox Y6605-16x26x5 MERV 16 PureAir PCO3-16-16
(Y6605)

The FiltersFast FF-Y6605 is the compatible replacement for the Lennox Y6605- PureAir PCO3-16-16.

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Lennox Y6605-16x26x5 MERV 16 PureAir PCO3-16-16
Our Price: $106.95
Retail: $109.95
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Hamilton Humidifier Evaporator Pad EP-036
(EP-036)

The Hamilton EP-036 is the correct replacement for the following humdifier: Hamilton 10F flow through humidifier The Hamilton Humidifier Evaporator Pad EP-036 is the part of the humidifier that collects moisture and then distributes it into th


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Hamilton Humidifier Evaporator Pad EP-036
Our Price: $14.99
Retail: $19.99
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FiltersFast A35WPR Replacement For Trane BAYPAD02A1310A
(T BAYPAD02A1310A R)

This FiltersFast Brand Trane BAYPAD02A1310A Humidifier Panel Filter offers Honeycomb filtration to trap mineral impurities found in water. You should replace your Trane filter twice a season or more often in hard water areas.


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FiltersFast A35WPR Replacement For Trane BAYPAD02A1310A
As Low As: $11.45
Retail: $14.99
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FiltersFast Brand Aprilaire SpaceGard 2400 16x27x6 2-Pack
(FFC162766SG)

The FiltersFast Compatible 16x27x6 MERV 11 Air Filter can be used as an upgrade for the Aprilaire Space Gard 2400. Upgrade your Space Gard AC filter today to the pre-assembled, easy to install FiltersFast Space Gard Compatible 16x27x6!


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FiltersFast Brand Aprilaire SpaceGard 2400 16x27x6 2-Pack
Our Price: $60.90
Retail: $99.99
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FiltersFast Brand 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 Brand Honeywell FC100A1037 MERV 13 2-PACK
Our Price: $83.99
Retail: $90.00
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Trion Air Bear Home Air Filter 16x25x3, 255649-101
(255649-101)

The Trion Air Bear Media AC Filter 16x25x3 part number 255649-101 is a genuine Trion Air Bear pleated media filter. The 255649101 can be used in Trion models Air Bear TM and Air Bear Cub. Replaces 229990-101 and 229990-001.


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Trion Air Bear Home Air Filter 16x25x3, 255649-101
As Low As: $22.49
Retail: $35.00
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FiltersFast Brand Trane PerfectFit BAYFTFR24M 24.5x27x5 2-Pack
(FFC24265TRN)

These FiltersFast Brand Trane Perfect Fit BAYFTFR24M 24.5x27x5 MERV 11 Furnace Filters are compatible upgrades over Trane Perfect Fit Air Filters. These FiltersFast Air Filters specifically replace Trane part number BAYFTFR24M, which is a 24.5x27x5


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FiltersFast Brand Trane PerfectFit BAYFTFR24M 24.5x27x5 2-Pack
Our Price: $70.95
Retail: $111.00
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Honeywell FC40R1003 Return Grille Filter
(FC40R1003)

The Honeywell FC40R1003 a high-efficiency, replacement filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 20x20x4. Genuine Honeywell Part.


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Honeywell FC40R1003 Return Grille Filter
As Low As: $44.95
Retail: $73.34
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FiltersFast Trion Compatible 20x20x5, MERV 11 2-Pack
(FFC20205TAB)

The FiltersFast Compatible 20x20x5 MERV 11 Air Filter can be used as an upgrade for Trion Air Bear part number 255649-103. Upgrade your Trion Air Bear Filter today for just a few extra dollars!

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FiltersFast Trion Compatible 20x20x5, MERV 11 2-Pack
Our Price: $49.80

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FiltersFast Trane Perfect Fit BAYFTFR21M 21x27x5 2pk
(FFC21275TRNM11)

These MERV 11 FiltersFast Brand compatible Furnace Filters are replacement filters for Trane Perfect Fit Air Filters. These FiltersFast Air Filters replace Trane part number BAYFTFR21M or FLR06070 , which is used in several Trane Air Cleaner models

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FiltersFast Trane Perfect Fit BAYFTFR21M 21x27x5 2pk
Our Price: $90.95
Retail: $109.95
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FiltersFast A35PR Replacement for Lennox WB2-17/WB2-18 Filter
(WB2-17/WB2-18 1R)

The Lennox WB2-17/WB2-18 Humidifier Metal Water Panel Filter is the correct compatible replacement for the following models of humidifiers: Lennox WB2-17 Lennox WB2-18 This metal Lennox humidifier water panel has approximate dimensions of 10"


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FiltersFast A35PR Replacement for Lennox WB2-17/WB2-18 Filter
As Low As: $7.95
Retail: $9.99
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Trane Perfect Fit BAYFTAH26M2A MERV 8 26x21x5
(BAYFTAH26M2A)

The Filtersfast Trane Perfect Fit BAYFTAH26M2A 26x21x5 is a furnace air filter that fits several high efficiency air cleaners from Trane. This Trane air filter boasts a MERV 8 rating for the reduction of particulates in your air, including dust


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Trane Perfect Fit BAYFTAH26M2A MERV 8 26x21x5
Our Price: $50.95
Retail: $54.95
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TopTech DTT-FM-2020 20x20x4 MERV 11 Filter
(DTT-FM-2020)

The TopTech DTT-FM-2020 20x20x4 MERV 11 Filter removes many allergens, dust, pollen and other airborne pollutants.


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TopTech DTT-FM-2020 20x20x4 MERV 11 Filter
Our Price: $35.25
Retail: $39.99
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Lennox X2660 Humidifier Water Panel Filter
(X2660)

The Lennox X2660 Humidifier Water Panel Filter is a replacement water panel filter for several Lennox Healthy Climate model humidifiers. This evaporator pad is also compatible with several humidifier models from Aprilaire. This humidifier filter rep


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Lennox X2660 Humidifier Water Panel Filter
Our Price: $14.99
Retail: $61.45
You Save 76%!

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Filters Fast - Air Filters

" Just to express my complete satisfaction with your ordering process and, of course, great pricing. When I need a replacement of refrigerator or HVAC filters, I'll be contacting you again. " - Frank, Corona, CA
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