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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 DSG401M11FF Comp For Aprilaire #401 Media Filter
(SG4PR-B)

The Space-Gard MERV 11 Compatible Media Filter 2-Pack is a two pack of compatible replacement air filters for the Aprilaire Model 2400 Air Cleaner. Model #401.


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FiltersFast DSG401M11FF Comp For Aprilaire #401 Media Filter
Our Price: $51.98
Retail: $59.99
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Lennox X8790 MERV 16 Air Filter Replacement
(X8790)

The Lennox X8790 MERV 16 Air Filter Replacement is a replacement air filter for the Lennox PCO14-23 PureAir Air Filtration System. This furnace filter measures approximately 20" x 21" x 5" and features a MERV 16 rating. A higher MERV rating results

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Lennox X8790 MERV 16 Air Filter Replacement
Our Price: $120.95
Retail: $229.00
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GeneralAire 3FM1625 MERV 8 Filter Media Cartridge
(4521)

The General Air 3FM1625 MERV8 Filter Cartridge measures 16"x25"x3", and is the correct filter for General Aire MAC1200 Series Air Cleaners. This General Aire filter will dramatically reduce airborne contaminates to provide much healthier indoor air.


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GeneralAire 3FM1625 MERV 8 Filter Media Cartridge
Our Price: $21.99
Retail: $29.99
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FiltersFast Brand Trion 16x25x5 Air Bear MERV13 2-Pack
(FFC16255TABM13)

The FiltersFast Brand Trion 16x25x5 Air Bear MERV13 2-Pack Furnace Filter is the compatible version of the genuine Trion Air Bear Media AC Filter 16x25x5, 255649-105.

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FiltersFast Brand Trion 16x25x5 Air Bear MERV13 2-Pack
Our Price: $94.00
Retail: $100.00
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FiltersFast A10PR R Replacement for Lennox WB2-1
(Lennox WB2-12 R)

The FiltersFast A10PR R Humidifier Water Panel Filter is the correct replacement for the Lennox WB2-1 and the following filters:


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FiltersFast A10PR R Replacement for Lennox WB2-1
As Low As: $6.99
Retail: $19.99
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FiltersFast A35PR Replacement for SPACE-GARD 35
(SPACE-GARD 35 1R)

The SPACE-GARD 35 Humidifier Metal Water Panel Filter is the correct compatible replacement for the following models of Space-Gard/Aprilaire furnace humidifiers: 350 360 560 560A 568 600 700 760 760A 768 This Space-Gard humidifier wat


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FiltersFast A35PR Replacement for SPACE-GARD 35
As Low As: $7.95
Retail: $9.99
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FiltersFast Trane 21x26x5 Perfect Fit BAYFTAH26M M13 x2
(FFC26215TRNM13)

If you are looking for an economical compatible version of the genuine Trane/American Standard BAYFTAH26M Perfect Fit Air Filter, try this FiltersFast Trane 21x26x5 Perfect Fit BAYFTAH26M M13 with a MERV 13 energy efficiency rating.

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FiltersFast Trane 21x26x5 Perfect Fit BAYFTAH26M M13 x2
Our Price: $111.00
Retail: $140.00
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3M Filtrete Home Odor AC Filter - 20 x 25 x 1
(Filtrete-Odor-20251)

The 3M Filtrete Home Odor AC Filter - 20 x 25 x 1 features activated carbon technology along with electrostatically charged fibers to provide high performance air filtration in your home. This Filtrete air filter can remove common odors such as pet,


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3M Filtrete Home Odor AC Filter - 20 x 25 x 1
Our Price: $21.61
Retail: $29.99
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Lennox X7935 MERV 16 Filter Media Replacement
(X7935)

The Lennox X7935 MERV 16 Filter Media Replacement is a replacement filter media for the Lennox HCC14-23 Healthy Climate True Fit Cabinet. Measuring approximately 20x20x5, this MERV 16 furnace filter box will trap at least 95% of particles.

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Lennox X7935 MERV 16 Filter Media Replacement
Our Price: $120.80
Retail: $149.95
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FiltersFast Brand White Rodgers 20x26x5 F825-0549 2Pack
(FFC20265WRM8)

The FiltersFast Brand 20x26x5 Air Filter F825-0549 is a compatible alternative for the OEM White Rodgers 20x26x5 Air Filter. This filter is made of fine carbon powder bonded to lofted polyester media for odor reduction.


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FiltersFast Brand White Rodgers 20x26x5 F825-0549 2Pack
Our Price: $41.99
Retail: $50.00
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Lennox X0587 MERV 11 Pleated Media Filter
(X0587)

This Lennox X0587 MERV 10 Pleated Media Filter is a MERV 10 replacement furnace filter. This pleated furnace filter offers quality filtration of impurities and pollutants in the air.


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Lennox X0587 MERV 11 Pleated Media Filter
Our Price: $42.95
Retail: $49.99
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Aprilaire 1413 Air Filter Performance Upgrade Kit
(Aprilaire 1413)

The Aprilaire 1413 is an Aprilaire Upgrade Kit that allows owners of Spacegard 2400 and Aprilaire 2400 air cleaners to use the MERV 13 Aprilaire 413 Filter instead of their MERV 10 Aprilaire 401 Filter. This improves air cleaning performance by 65 p

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Aprilaire 1413 Air Filter Performance Upgrade Kit
Our Price: $55.95
Retail: $64.99
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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: $32.99
Retail: $38.51
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FiltersFast Brand 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 Brand Trion 16x25x3 Air Bear MERV13 3-Pack
Our Price: $84.00
Retail: $100.00
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Lennox X5425 MERV 16 Pleated Furnace Filter Media
(X5425)

This Lennox X5425 MERV 16 Pleated Furnace Filter Media is an excellent filter for someone who wants a significant upgrade over standard fiberglass filters from the hardware store. This pleated filter is a genuine MERV 16 filter.

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Lennox X5425 MERV 16 Pleated Furnace Filter Media
Our Price: $91.95
Retail: $122.10
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Trion Air Bear Cub Filter 16x25x3 MERV 11
(259112-101)

The 259112-101 is the correct filter replacement for all air cleaning sytems requiring a 16" x 25" x 3" air filter. The Trion Air Bear Cub Filter is a genuine Air Bear filter.


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Trion Air Bear Cub Filter 16x25x3 MERV 11
Our Price: $26.99

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Whirlpool 1183054 HEPA Filter
(1183054)

The Whirlpool 1183054 replacement HEPA filter filter removes airborne contaminants known known to cause or worsen respiratory problems. The synthetic-based filter membrane captures microscopic air particles such as dust, pollen, and smoke.

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Whirlpool 1183054 HEPA Filter
Our Price: $109.99
Retail: $149.99
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Carrier Bryant 318518-762 Humidifier Filter Replacement
(318518-762)

The Carrier 318518-762 Humidifier Filter Replacement is a replacement humidifier filter for several models of humidifiers from Bryant/Carrier. This whole house humidifier filter is made from high quality material in order to provide you with higher


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Carrier Bryant 318518-762 Humidifier Filter Replacement
Our Price: $39.99
Retail: $49.99
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Honeywell 203369 Pre-Filter 12.5 x 20 x 11/32 2-Pack 2-Pack
(203369)

The Honeywell 203369 Pre-Filter 12.5x20x.375 2-Pack is a replacement pre-filter for the Honeywell model F50 and F300 air cleaners. This Honeywell air filter traps larger particles in your air to help improve your overall indoor air quality and incre


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Honeywell 203369 Pre-Filter 12.5 x 20 x 11/32 2-Pack
Our Price: $47.32

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FiltersFast Brand Trane 24x26x5 Perfect Fit BAYFTFR24M
(FFC24265TRNM8)

The FiltersFast Brand Trane 24x26x5 Perfect Fit BAYFTFR24M Filter is the compatible alternative of the genuine OEM 24x26x5 Trane Perfect Fit BAYFTFR24M Filter.


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FiltersFast Brand Trane 24x26x5 Perfect Fit BAYFTFR24M
Our Price: $50.95
Retail: $70.00
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Honeywell 32000146-001 Humidifier Filter
(7098 13 R)

The Honeywell 32000146-001 Humidifier Filter is a replacement humdifier filter made for several Honeywell drum-type humidifier models. This Honeywell evaporator pad measures approximately 7.5" H x 26.5" L x 1" W and removes minerals from evaporating


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Honeywell 32000146-001 Humidifier Filter
Our Price: $8.01
Retail: $9.99
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Honeywell FC40R1060 16x25 Return Air Grille Filter
(FC40R1060)

Honeywell FC40R1060 16x25 Return Air Grille AC Filter is a high efficiency, replacement air filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 16x25x4.


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Honeywell FC40R1060 16x25 Return Air Grille Filter
Our Price: $44.00
Retail: $46.00
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6-Pack Trion Air Bear Cub Filter 16x25x3 MERV 11
(259112-101 6Pack)

The Trion Air Bear Cub Filter 16x25x3 MERV 11 6-Pack can be used Trion AirBear Air Cleaners and all air cleaners that need 16"x25"x3" air filters. These Trion filters are an economical upgrade from simple poly-pleated or fiberglass filters.

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6-Pack Trion Air Bear Cub Filter 16x25x3 MERV 11
Our Price: $91.99
Retail: $109.99
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Hunter 30901 Carbon Purifier Pre-Filter
(30901)

The Hunter 30901 Carbon Pre-Filter fits all Hunter QuietFlo and HEPAtech purifiers. The 30901 Carbon Pre-Filter's activated charcoal absorbs odors from pets, smoking, cooking and more.


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Hunter 30901 Carbon Purifier Pre-Filter
As Low As: $20.50
Retail: $27.95
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FiltersFast Brand Bryant,Carrier FILXXFNC0021 Filter 2-Pack
(FILXXFNC0021)

FiltersFast Brand Bryant,Carrier FILXXFNC0021 Filter


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FiltersFast Brand Bryant,Carrier FILXXFNC0021 Filter 2-Pack
Our Price: $55.99
Retail: $69.99
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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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