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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


GE Air Conditioner Filter for Zoneline A/C (Left)
(WP85X10003)

This GE Air Conditioner Filter (WP85X10003) is a replacement filter for GE Zoneline air conditioning (A/C) units. This air conditioner filter fits in the left side panel slot only - the filter for the right side panel slot is sold separately.


Special Order. Ships in 4 days.
GE Air Conditioner Filter for Zoneline A/C (Left)
Our Price: $17.55
Retail: $22.99
You Save 24%!

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Honeywell FC100A1045 21.5" x 27.5" Media Filter
(FC100A1045)

The Honeywell FC100A1045 21.5" x 27.5" Media Filter is a high efficiency Media Air Filter that can be used in Honeywell Model F27F1057. Genuine Honeywell Part.


In Stock! Ships in 4 to 5 business days.
Honeywell FC100A1045 21.5" x 27.5" Media Filter
As Low As: $53.99
Retail: $59.99
You Save 10%!

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Trane 24x26x5 Perfect Fit BAYFTFR24M Filter 2pk
(FFC24265TRNM8)

The Trane MERV 8 24x26x5 Perfect Fit BAYFTFR24M Filter is the compatible alternative of the genuine OEM 24x26x5 Trane Perfect Fit BAYFTFR24M Filter.


In Stock! Ships in 1 to 2 business days.
Trane 24x26x5 Perfect Fit BAYFTFR24M Filter 2pk
Our Price: $50.00
Retail: $70.00
You Save 29%!

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Trane BAYFTAH21P4A Pleated 1 inch Filter 21.5x21x1
(BAYFTAH21P4A)

The Trane BAYFTAH21P4A is an air conditioning and furnace filter for use in the following application: 21 1/2 inch enclosures The Trane BAYFTAH21P4A Pleated 1 inch Filter 21.5x21x1 is a 1 inch pleated filter. This Trane perfect fit filter meas


In stock! Ships in 1 business day.
Trane BAYFTAH21P4A Pleated 1 inch Filter 21.5x21x1
Our Price: $11.83
Retail: $14.99
You Save 21%!

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F825-0549 White Rodgers Compatible 20x26x5, 2-Pack
(FFC20265WR)

The Filters Fast Compatible 20x26x5 MERV 11 Air Filter can be used as an upgrade for White Rodgers part number F825-0549. Upgrade your White Rodgers Media Filter today and get a better filter for the same price as the original manufacturer's brand!


In Stock! Ships in 1 to 2 business days.
F825-0549 White Rodgers Compatible 20x26x5, 2-Pack
Our Price: $72.99
Retail: $79.99
You Save 9%!

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Free Flow Room Air Conditioner Filter - 15" x 24"
(93524)

This Free Flow Room Air Conditioner Filter (1777) is a universal 15" x 24" cut to fit black foam room air conditioner filter. It filters dirt, dust, soot, pollen, and other allergens.


Special Order. Ships in 3 days.
Free Flow Room Air Conditioner Filter - 15" x 24"
Our Price: $3.00
Retail: $5.99
You Save 50%!

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GE WP85X10004 Zoneline Air Conditioner Filter
(WP85X10004)

This GE Zoneline Air Conditioner Filter (GE WP85X10004) is a slide in replacement AC filter that removes many contaminants in your air including dust, pollen, hair, pet dander, mold spores, and more. It is used in numerous General Electric Zoneline


Special Order. Ships in 2 days.
GE WP85X10004 Zoneline Air Conditioner Filter
Our Price: $17.55
Retail: $19.99
You Save 12%!

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Honeywell FC40R1128 - Return Grille Filter 14x24 5-Pack
(FC40R1128)

The Honeywell FC40R1128 is a return air grille filter that fits the following: Any return air grille that uses a 14 inch x 24 inch x 4 inch filter The Honeywell FC40R1128 - Return Grille Filter 14x24 has a Minimum Efficiency Reporting Value (M


In stock! Ships in 1 business day.
Honeywell FC40R1128 - Return Grille Filter 14x24
Our Price: $137.85

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White Rodgers 16x26x5 Filter F825-0548 2-Pack
(FFC16265WRM8)

If you are looking for an economical compatible alternative for the OEM White Rodgers 16x26x5 Air Furnace Filter try this White Rodgers 16x26x5 Furnace Filter Replacement F825-0548.


In Stock! Ships in 1 to 2 business days.
White Rodgers 16x26x5 Filter F825-0548 2-Pack
Our Price: $57.00
Retail: $59.99
You Save 5%!

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Trion Air Bear Media AC Filter 16x25x3 6-Pack
(255649-101 6pack)

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 as an upgrade.

Free shipping within the continental United States!

In Stock! Ships in 19 to 20 business days.
Trion Air Bear Media AC Filter 16x25x3 6-Pack
Our Price: $102.00
Retail: $132.00
You Save 23%!

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F825-0548 White Rodgers Compatible 16x26x5, 2pk
(FFC16265WR)

The Filters Fast Compatible 16x26x5 MERV 11 Air Filter can be used as an upgrade for White Rodgers part number F825-0548. Upgrade your White Rodgers Media Filter today and get a better filter for the same price as the original manufacturer's brand!


In Stock! Ships in 1 to 2 business days.
F825-0548 White Rodgers Compatible 16x26x5, 2pk
Our Price: $54.25
Retail: $55.25
You Save 2%!

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Honeywell FC200E1011 Media Filter 20x20x5- Merv 13
(FC200E1011)

The Honeywell FC200E1011 Media Filter 20x20x5- Merv 13 is a replacement air filter for the Honeywell 20X20 F100 and F200 media air cleaners. This Honeywell air filter boasts a MERV 13 rating and removes over 97% of 3 to 10 micron particles from indo


In Stock! Ships in 7 to 8 business days.
Honeywell FC200E1011 Media Filter 20x20x5- Merv 13
Our Price: $44.99

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Trane 21x27x5 Perfect Fit Filter BAYFTFR21M M13 x2
(FFC21275TRNM13)

The Trane 21x27x5 Perfect Fit Filter BAYFTFR21M is an economical compatible version of the genuine Trane 21x27x5 Perfect Fit Air Filter.

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
Trane 21x27x5 Perfect Fit Filter BAYFTFR21M M13 x2
Our Price: $110.00
Retail: $140.00
You Save 21%!

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Trane Perfect Fit BAYFTAH23W1A Prefilter 23.5x21x1
(BAYFTAH23W1A)

The Trane Perfect Fit BAYFTAH23W1A Prefilter 23.5x21x1 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 23 1/2" enclosures and measures approximately


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTAH23W1A Prefilter 23.5x21x1
Our Price: $20.33
Retail: $29.99
You Save 32%!

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Honeywell 20x20x5 Filter FC100A1011 MERV 8 2-Pack
(FFC20205HONM8)

Honeywell 20x20x5 FC100A1011 Air Filter is an economical compatible version of the OEM Honeywell FC100A1011 20"x20" Media AC Filter. To save money, this air filter replacement comes in a 2pk value set.


In Stock! Ships in 1 to 2 business days.
Honeywell 20x20x5 Filter FC100A1011 MERV 8 2-Pack
Our Price: $43.90
Retail: $50.00
You Save 12%!

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Honeywell FC40R1094 12x12x3 Return Grille Filter
(FC40R1094)

The Honeywell FC40R1094 is a high-efficiency, replacement air filter for return grille applications. Designed to capture airborne particles that circulate through the filter. Nominal Dimension 12x12x4. Genuine Honeywell Part.


In stock! Ships in 1 business day.
Honeywell FC40R1094 12x12x3 Return Grille Filter
As Low As: $37.50
Retail: $50.00
You Save 25%!

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Honeywell FC40R1102 Return Grille Filter-14x14x3 5-Pack
(FC40R1102)

The Honeywell FC40R1102 is a high-efficiency, replacement air filter for return grille applications. Designed to capture airborne particles that circulate through the AC filter. Nominal Dimension 14x14x4. Genuine Honeywell Part.


In stock! Ships in 1 business day.
Honeywell FC40R1102 Return Grille Filter-14x14x3
Our Price: $135.85

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Filters Fast Trion Air Bear 16x25x3 Air Filter 3-Pack
(FFC16253TAB)

Replace your Trion Air Bear 255649-101 16x25x3 air filter with this Filters Fast compatible AC filter, which features a MERV 11 rating, an upgrade from the MERV 8 Trion Air Bear.


In Stock! Ships in 1 to 2 business days.
Filters Fast Trion Air Bear 16x25x3 Air Filter 3-Pack
Our Price: $65.00

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Trion Air Bear Right Angle Media Air Cleaner
(447380-010)

The Trion Air Bear Right Angle Media Air Cleaner, part number 447380-002, provides a clean and controlled indoor air environment in your home. Ideal for installations that normally require a 90 degree duct adaptor.

Free shipping within the continental United States!

In Stock! Ships in 21 to 22 business days.
Trion Air Bear Right Angle Media Air Cleaner
Our Price: $121.83
Retail: $199.99
You Save 39%!

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Trane 21x23x5 Perfect Fit Filter BAYFTAH23M M13 x2
(FFC21235TRNM13)

The Trane 21x23x5 Perfect Fit Filter BAYFTAH23M is a compatible version of the genuine Trane Perfect fit 21x23x5 Air Filter.

Free shipping within the continental United States!

In Stock! Ships in 1 to 2 business days.
Trane 21x23x5 Perfect Fit Filter BAYFTAH23M M13 x2
Our Price: $110.00
Retail: $140.00
You Save 21%!

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Filters Fast 5" Trane BAYFTAH21M Compatible 2-Pack
(FFC215215TRN OKGM)

The Filters Fast 5" Trane PF BAYFTAH21M Compatible FFC215215TRN OKGM fits the following: Any air cleaner that requires a 21" x 21.5" x 5" filter This Filters Fast air filter also replaces the Trane Perfect Fit BAYFTAH21M filter. This air filte


In Stock! Ships in 1 to 2 business days.
Filters Fast 5" Trane BAYFTAH21M Compatible 2-Pack
Our Price: $49.90
Retail: $99.99
You Save 50%!

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Trion Air Bear Supreme 2000 Media Air Cleaner
(455602-025)

The Trion Air Bear Supreme 2000 Media Air Cleaner, part number 455602-019, provides a clean and controlled indoor air environment in your home by removing dirt, dust, pollen and other microscopic particles from your air.


In Stock! Ships in 21 to 22 business days.
Trion Air Bear Supreme 2000 Media Air Cleaner
Our Price: $71.21
Retail: $120.74
You Save 41%!

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Filters Fast 16x25x5 MERV 8 Air Filter 2-Pack
(FFC16255HON OKGM)

The Filters Fast 16x25x5 MERV 8 Air Filter 3-Pack is a replacement pack of compatible air filters that is an upgrade the Honeywell FC100A1029 and Carrier FILCCCAR0016 air filters. This 3 pack of 16" x 25" x 5" filters features a MERV 8 rating and


In Stock! Ships in 1 to 2 business days.
Filters Fast 16x25x5 MERV 8 Air Filter 2-Pack
Our Price: $49.90
Retail: $94.99
You Save 47%!

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Trane Perfect Fit BAYFTFR14P4A Filter - 14.5x27x1
(BAYFTFR14P4)

The Trane Perfect Fit BAYFTFR14P4A Filter - 14.5x27x1 is a furnace air filter that fits several air cleaner models from Trane. This Trane Perfect Fit filter features pleats that help capture a variety of airborne particles to purify your air. This T


In stock! Ships in 1 business day.
Trane Perfect Fit BAYFTFR14P4A Filter - 14.5x27x1
Our Price: $16.11
Retail: $19.99
You Save 19%!

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GE Air Conditioner Filter for Zoneline A/C (Right)
(WP85X10002)

This GE Air Conditioner Filter (WP85X10002) is a replacement filter for GE Zoneline air conditioning (A/C) units. This air conditioner filter only fits in the right side panel slot of the Zoneline A/C unit - the filter for the left side panel slot


Special Order. Ships in 9 days.
GE Air Conditioner Filter for Zoneline A/C (Right)
Our Price: $15.08
Retail: $29.99
You Save 50%!

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Filters Fast - Furnace 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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