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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.

Routine maintenance is a critical part of caring for your home. One area that should not be overlooked is replacing your home’s furnace filters on a regular basis following the manufacturers recommended guidelines. By doing this, you will help prolong the life of your system, as well as help eliminate indoor air contaminates.

Air filters help rid your home of a variety of air pollutants including smog, smoke, pollen, bacteria, pet dander, mold spores, dust, dust mites, debris and virus carrying particles. The MERV rating on furnace filters can help guide you in this area. The higher the rating, the more efficient the air filter will be at eliminating indoor contaminates.

Filtrete, Trion, 3M and Honeywell all manufacture high quality filters in a variety of sizes to meet all of your air filtration needs.


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Furnace Filters product list


Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1 2-Pack
(BAYFTAH21W1A)

The Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1 is an OEM replacement filter from Trane that features a MERV 5 rating for the reduction of airborne particulates. This Trane Perfect Fit filter fits 21 1/2" enclosures and measures approximately


Out of stock
Trane Perfect Fit BAYFTAH21W1A Prefilter 21.5x21x1
Our Price: $37.02

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Nordyne 918394 Merv 11 Filter 2-Pack-16x22x5
(918394 Comp.)

The Nordyne 918394 Merv 11 Air Filter 2-Pack-16x22x5 scrubs the air of atmospheric and household dust, tobacco smoke, cooking smoke, grease, mold, fungi, mites, pollens and more down to 0.3 microns.


In Stock! Ships in 1 to 2 business days.
Nordyne 918394 Merv 11 Filter 2-Pack-16x22x5
Our Price: $54.99
Retail: $68.74
You Save 20%!

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Totaline CMF1620 Merv 11 Filter 2-Pack-16x22x5
(Totaline CMF1620)

The Totaline CMF1620 Air Filter 2-Pack-16x22x5 removes atmospheric and household dust


In Stock! Ships in 1 to 2 business days.
Totaline CMF1620 Merv 11 Filter 2-Pack-16x22x5
Our Price: $54.99
Retail: $68.74
You Save 20%!

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Honeywell FC40R1110 Air Filter 14X20x3 2-Pack
(FC40R1110)

The Honeywell FC40R1110 is a return air grille filter that fits the following: Any return air grille that uses a 14 inch x 20 inch x 4 inch filter The Honeywell FC40R1110 Furnace Air Filter - 14X20 has a Minimum Efficiency Reporting Value (MER


Out of stock
Honeywell FC40R1110 Air Filter 14X20x3 2-Pack
Our Price: $121.90
Retail: $139.98
You Save 13%!

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Trane Perfect Fit BAYFTFR14W1A Prefilter 14.5x27x1 2-Pack
(BAYFTFR14W1A)

The Trane Perfect Fit BAYFTFR14W1A Prefilter 14.5x27x1 is a washable filter with a MERV 5 rating that needs to be changed every 3 months for maximum efficiency. This Trane pre-filter includes two filters that measure approximately 12 7/8" X 14 1/4"


Special Order. Ships in 24 days.
Trane Perfect Fit BAYFTFR14W1A Prefilter 14.5x27x1
Our Price: $35.08

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Trane BAYFRAME235A Filter Frame Kit - 23.5x5x5
(BAYFRAME235A)

The Trane BAYFRAME235A is an air filter kit that fits the following air cleaner model: Trane TFM235A0AH1 The Trane BAYFRAME235A Filter Frame Kit - 23.5x5x5 contains 1 plastic frame and 1 BAYFTAHEXM expandable accordion filter. This Trane Perfe

Free shipping within the continental United States!

Special Order. Ships in 21 days.
Trane BAYFRAME235A Filter Frame Kit - 23.5x5x5
Our Price: $150.63
Retail: $199.99
You Save 25%!

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Trane BAYFRAME245A Filter Frame Kit - 24.5x27x5 2-Pack
(BAYFRAME245A)

The Trane BAYFRAME245A is an air filter kit that fits the following air cleaner model: Trane TFM245A0FR0 The Trane BAYFRAME245A Filter Frame Kit - 24.5x27x5 contains 1 plastic frame and 1 BAYFTFREXM expandable accordion filter. This Trane Perf

Free shipping within the continental United States!

Special Order. Ships in 25 days.
Trane BAYFRAME245A Filter Frame Kit - 24.5x27x5
Our Price: $392.72

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Trane BAYFRAME145A Filter Frame Kit - 14.5x27x5 2-Pack
(BAYFRAME145A)

The Trane BAYFRAME145A is an air filter kit that fits the following air cleaner model: Trane TFM145A0FR0 The Trane BAYFRAME145A Filter Frame Kit - 14.5x27x5 contains 1 plastic frame and 1 BAYFTFREXM expandable accordion filter. This Trane Perf

Free shipping within the continental United States!

Special Order. Ships in 26 days.
Trane BAYFRAME145A Filter Frame Kit - 14.5x27x5
Our Price: $309.00

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Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5
(BAYFRAME210A)

The Trane BAYFRAME210A is an air filter kit that fits the following air cleaner model: Trane TFM210A0FR0 The Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5 contains 1 plastic frame and 1 BAYFTFREXM expandable accordion filter. This Trane P

Free shipping within the continental United States!

Special Order. Ships in 22 days.
Trane Perfect Fit BAYFRAME210A Filter Kit- 21x27x5
Our Price: $157.72
Retail: $199.99
You Save 21%!

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Vent Cover Magnetic Sheets - 3 pack (cut to fit)
(VC1)

The RPS Vent Cover Magnetic Sheets is designed to control air flow that is energy efficient and saves you money.


Special Order. Ships in 2 days.
Vent Cover Magnetic Sheets - 3 pack (cut to fit)
As Low As: $13.95
Retail: $19.99
You Save 30%!

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Indoor Air Quality Test Kit, Bio-Scan 400
(Bio-Scan 400)

Did you know most indoor air is littered with polutants that make breathing in your own home or office hazardous for your health! Allergies, dry, itchy eyes and throat can all be signs that your indoor air quality is sub-standard. The Bio-Scan 400...


Special Order. Ships in 36 days.
Indoor Air Quality Test Kit, Bio-Scan 400
As Low As: $54.85
Retail: $79.99
You Save 31%!

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Filters Fast Odor Killer Air Filter, 6-pack
(FFOK 6-pack)

The Filters Fast Odor Killer is a MERV 8 two-stage carbon blended filter designed to "kill" odors such as cigarette smoke, pet odors, irritating gases, cooking odors and other bad odors that might be affecting your indoor air quality.


In Stock! Ships in 1 to 2 business days.
Filters Fast Odor Killer Air Filter, 6-pack
Our Price: $76.67
Retail: $79.99
You Save 4%!

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Filters Fast MERV 13 Return Grille Air Filter - 5"
(FFRAG13)

Protect your health, your environment and your wallet with a Filters Fast MERV 13 Return Grille Air Filter. MERV 13 is one of the highest efficiency ratings available, and Filters Fast now offers this rating in a 5" Return Air Grille application.


Discontinued Product Read Description.
Filters Fast MERV 13 Return Grille Air Filter - 5"
Our Price: $39.99
Retail: $49.99
You Save 20%!

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Filters Fast Odor Killer Return Air Grille Filter
(FFRAGOK)

Filters Fast now offers its 5" Return Air Grille Filters with Odor Killer technology, a MERV 8 two-stage carbon blended filter designed to "kill" odors. FFRAGOK.


Discontinued Product Read Description.
Filters Fast Odor Killer Return Air Grille Filter
Our Price: $45.00
Retail: $59.99
You Save 25%!

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Filters Fast MERV 11 Return Grille Air Filter 5"
(FFRAGF)

The Filters Fast MERV 11 Return Grille Air Filter 5" are a great option for upgrading or replacing the traditional 1-inch air filter found in your home or office. View details to learn more...


In Stock! Ships in 12 to 13 business days.
Filters Fast MERV 11 Return Grille Air Filter 5"
Our Price: $29.99
Retail: $39.99
You Save 25%!

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Filters Fast Odor Killer Air Filter, 12-pack
(FFOKM8)

The Filters Fast Odor Killer is a MERV 8 two-stage carbon blended filter designed to "kill" odors such as cigarette smoke, pet odors, irritating gases, cooking odors and other bad odors that might be affecting your indoor air quality.


Discontinued Product Read Description.
Filters Fast Odor Killer Air Filter, 12-pack
Our Price: $99.00
Retail: $100.00
You Save 1%!

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FiltersFast GeneralAire Compatible 20x24x5, 2-pack
(FFC20245GA)

The Filters Fast Compatible 20x24x5 MERV 11 Air Filter can be used as a replacement for GeneralAire part number 12758. Fits Generalaire AC-1 and Byrant 902BXX020.


Discontinued Product Read Description.
FiltersFast GeneralAire Compatible 20x24x5, 2-pack
Our Price: $48.25
Retail: $49.25
You Save 2%!

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Filtrete Advanced Allergen (Deep Blue) 6-pack
(Advanced Allergen 6pack)

The Advanced Allergen Air Filter is the newest, most advanced high-performance filter from Filtrete. No Competitor's #1 Filter Performs Better! It even out performs the Filtrete Ultra Allergen--previously the #1 Performance Filter on the Market.

Free shipping within the continental United States!

Discontinued Product Read Description.
Filtrete Advanced Allergen (Deep Blue) 6-pack
Our Price: $110.00
Retail: $126.00
You Save 13%!

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3M Filtrete 4 Inch Allergen Media Filter 4-pack
(4 inch Allergen 4-pack)

3M Filtrete Allergen Reduction Filter for Media Air Cleaners are the smart choice if you're looking to upgrade or retrofit the air filter in your existing HVAC system. Captures 97% of large airborne allergens like pollen, mold spores, & dust mites.

Free shipping within the continental United States!

Discontinued Product Read Description.
3M Filtrete 4 Inch Allergen Media Filter 4-pack
Our Price: $128.00
Retail: $146.00
You Save 12%!

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Filtrete Custom Size Air Filter 6-Pack
(Custom Filtrete)

Can't find the size air filter you need? We can now provide custom size air filters to fit your needs! Custom sizes available in the Ultra Allergen Series and are subject to requirements. To view these requirements please click view details...

Free shipping within the continental United States!

Discontinued Product Read Description.
Filtrete Custom Size Air Filter 6-Pack
Our Price: $186.81
Retail: $196.15
You Save 5%!

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Filtrete Advanced Allergen Air Filter (Deep Blue)
(Advanced Allergen)

The Advanced Allergen Air Filter is the newest, most advanced high-performance filter from Filtrete. No Competitor's #1 Filter Performs Better! It even out performs the Filtrete Ultra Allergen--previously the #1 Performance Filter on the Market.


Discontinued Product Read Description.
Filtrete Advanced Allergen Air Filter (Deep Blue)
Our Price: $18.99
Retail: $21.00
You Save 10%!

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3M Filtrete 4 Inch Allergen Reduction Filter
(4 inch Allergen)

3M Filtrete Allergen Reduction Filter for Media Air Cleaners are the smart choice if you're looking to upgrade or retrofit the air filter in your existing HVAC system. Captures 97% of large airborne allergens like pollen, mold spores, & dust mites.


Discontinued Product Read Description.
3M Filtrete 4 Inch Allergen Reduction Filter
As Low As: $60.32
Retail: $69.99
You Save 14%!

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French Scents Air Filter Freshener Mountain Breeze
(42068)

The French Scents Air Filter Freshener (42068 Mountain Breeze scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area. This French Sc


Discontinued Product Read Description.
French Scents Air Filter Freshener Mountain Breeze
Our Price: $1.99
Retail: $3.99
You Save 50%!

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French Scents Air Filter Freshener - Fresh Berries
(86118)

The French Scents Air Filter Freshener (86118 Fresh Berries scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area. This French Scen


Discontinued Product Read Description.
French Scents Air Filter Freshener - Fresh Berries
Our Price: $3.99
Retail: $4.99
You Save 20%!

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French Scents Air Filter Freshener - Marine Scent
(86195)

The French Scents Air Filter Freshener (86195 Marine Scent) is a whole home air freshener packet that is easily attached to any air filter to provide scented air throughout your entire home, business, or other indoor area.


Discontinued Product Read Description.
French Scents Air Filter Freshener - Marine Scent
Our Price: $2.99
Retail: $3.99
You Save 25%!

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Filters Fast - Furnace Filters

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