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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.


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Air Filters product list


Honeywell F300A2025 20x25 Electronic Air Cleaner
(F300A2025)

The Honeywell F300A2025 20x25 Electronic Air Cleaner helps to filter efficiency-robbing "gunk" before it coats critical parts of the system.

Free shipping within the continental United States!

In Stock! Ships in 2 to 3 business days.
Honeywell F300A2025 20x25 Electronic Air Cleaner
Our Price: $579.99
Retail: $599.99
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Honeywell F100F2044 25x20 Whole House Air Cleaner
(F100F2044)

The Honeywell F100F2044 25x20 Whole House Air Cleaner does not require electrical connections and mounts in the return air duct in any position.

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In Stock! Ships in 13 to 14 business days.
Honeywell F100F2044 25x20 Whole House Air Cleaner
Our Price: $121.69
Retail: $134.99
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Honeywell F100F2051 25x22 Whole Home Air Purifier
(F100F2051)

The Honeywell F100F2051 25x22 Air Purifier System is applicable to all gas, oil and electric forced air furnaces and to compressor cooling up to 5 tons.


In Stock! Ships in 10 to 11 business days.
Honeywell F100F2051 25x22 Whole Home Air Purifier
Our Price: $98.99
Retail: $99.99
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Magnetic Vent Cover HVAC Air Filter 4x18 100-Pack
(MAGNETIC VENT 4X18)

Add a durable and reusable barrier of protection from hair, dust, and bugs with an easy to install 4x18 Magnetic Vent Cover HVAC Air Filter. Constructed from a soft PVC grid using a polypropylene mesh the filter attaches to your metal register.


Special Order. Ships in 7 days.
Magnetic Vent Cover HVAC Air Filter 4x18
Our Price: $995.00

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Magnetic Vent Cover HVAC Air Filter 8x18 70-Pack
(MAGNETIC VENT 8X18)

Some of the best things in life are simple, like a washable 8x18 Magnetic Vent Cover HVAC Air Filter that installs in no time at all and prevent pesky hair, dirt, and bugs from going into or leaving your air vents.


Special Order. Ships in 7 days.
Magnetic Vent Cover HVAC Air Filter 8x18
Our Price: $906.50

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Honeywell F300E1027 20x20 Electronic Air Purifier
(F300E1027)

The Honeywell F300E1027 20x20 Electronic Air Purifier has a rugged zinc-coated, roll-formed cabinet that provides superior strength and corrosion protection.

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Special Order. Ships in 2 days.
Honeywell F300E1027 20x20 Electronic Air Purifier
Our Price: $569.99
Retail: $599.99
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Honeywell F300E1035 20x25 Electronic Air Cleaner
(F300E1035)

The Honeywell F300E1035 20x25 Electronic Air Cleaner operates with all gas, oil and electric forced warm air furnaces and air conditioning systems.

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Special Order. Ships in 4 days.
Honeywell F300E1035 20x25 Electronic Air Cleaner
Our Price: $639.99
Retail: $699.99
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Trion 227833-003 Charcoal Filter 5-Pack
(227833-003)

The Trion 227833-003 Charcoal Filter is an air filter replacement that fits select Trion 16x25 air cleaner models (see above). This Trion filter measures approximately 12" x 16" x 3/8" and features activated charcoal that absorbs odors and


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Trion 227833-003 Charcoal Filter
Our Price: $159.95

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Carrier 356066-1201 Charcoal Filter EACBAXCC0020 2-Pack
(356066-1201)

The Carrier 356066-1201 Charcoal Filter is a genuine OEM factory replacement charcoal carbon filter for compatible Carrier air cleaners and Bryant air cleaners, especially the Carrier EACBAXCC0020 Electronic Air Cleaner.


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Carrier 356066-1201 Charcoal Filter EACBAXCC0020
Our Price: $189.90

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Carrier FILCCCAR0024 Air Purifier Filter 2-Pack 2-Pack
(FILCCCAR0024)

The Carrier FILCCCAR0024 Air Purifier Filter is a genuine OEM factory replacement air filter for Bryant, Carrier, Payne, Day-Night, as well as certain Honeywell, Space-Gard, and Trion air purifiers. It fits numerous units including model numbers FIL


Special Order. Ships in 7 days.
Carrier FILCCCAR0024 Air Purifier Filter 2-Pack
Our Price: $139.76

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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 1 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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3M OAC100RF Replacement Air Filter 6-Pack
(OAC100RF)

The 3M OAC100RF Replacement Air Filter is the replacement filter for the 3M Filtrete OAC100 Office Air Cleaner. This easy to change filter reduces airborne dust, pollen and particulates down to 0.01 microns.


Special Order. Ships in 12 days.
3M OAC100RF Replacement Air Filter 6-Pack
Our Price: $131.94
Retail: $162.00
You Save 19%!

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Aprilaire Space Gard 2400 Compat 16x27x6 AC Filter 12-Pack 12-Pack
(FC2400A1005)

The Honeywell FC2400A1005 is a compatible AC filter for the Aprilaire and Space Gard 2400 (filter model 401) and is also used in Research Products cabinet models 2200, 2250 and 2400. This filter boasts a MERV 10 rating.


Special Order. Ships in 5 days.
Aprilaire Space Gard 2400 Compat 16x27x6 AC Filter 12-Pack
Our Price: $537.60

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Hunter 30960 QuietFlo HEPA Purifier Filter 3-Pack
(30960)

The Hunter 30960 QuietFlo HEPA Purifier Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.3 microns.


Special Order. Ships in 8 days.
Hunter 30960 QuietFlo HEPA Purifier Filter
Our Price: $204.75

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Hunter 30925 HEPAtech Purifier Filter
(30925)

The Hunter 30925 HEPAtech v Filter is an electrostatically-charged filter that captures 99.9% of particles as small as 0.1 microns.


Special Order. Ships in 5 days.
Hunter 30925 HEPAtech Purifier Filter
Our Price: $23.00
Retail: $34.00
You Save 32%!

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GeneralAire 100329 Ventilator Filter Replacement
(4667)

The GeneralAire 100329 Ventilator Filter Replacement is the correct replacement for the following models of energy/heat recovery ventilators: ERV3220 HRV8220 Energy/heat recovery ventilators bring fresh outdoor air into your home while gettin


Special Order. Ships in 7 days.
GeneralAire 100329 Ventilator Filter Replacement
Our Price: $49.99
Retail: $69.99
You Save 29%!

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GeneralAire DC4E Elite Dehumidistat Control
(4685)

The GeneralAire DC4E is the correct replacement for the following ventilators: GeneralAire Heat Recovery Ventilators and GeneralAire Energy Recovery Ventilators.

Free shipping within the continental United States!

Special Order. Ships in 7 days.
GeneralAire DC4E Elite Dehumidistat Control
Our Price: $200.69
Retail: $249.99
You Save 20%!

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General Aire Air Cleaner Indicator Light 58-0123
(4788)

The General Aire Air Cleaner Indicator Light 58-0123 is a replacement indicator light for the GeneralAire GA52F32 Grill Mount Air Cleaner. The GeneralAire 58-0123 indicator light is installed next to the C5-0223 on/off switch and lights up through a


Special Order. Ships in 7 days.
General Aire Air Cleaner Indicator Light 58-0123
Our Price: $29.99
Retail: $39.99
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General Aire Air Cleaner Fan Blade C5-0710
(4705)

The General Aire Air Cleaner Fan Blade C5-0710 fits the following models of air cleaners: SSCB15-WHT SSCB15-W-R This GeneralAire air cleaner part is the air cleaner's fan blade. The GeneralAire air cleaner fan blade C5-0710 is also known as G

Free shipping within the continental United States!

Special Order. Ships in 7 days.
General Aire Air Cleaner Fan Blade C5-0710
Our Price: $149.99
Retail: $199.99
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General Aire Important Label EACGM-19
(GeneralAire 4793)

The General Aire Important Label EACGM-19 is a replacement Important Label for the GeneralAire Model GA52F32 Grill Mount Air Cleaner. The GeneralAire EACGM-19 Important Label is an optional component of your GA52F32 air cleaner and is an OEM replace


Special Order. Ships in 7 days.
General Aire Important Label EACGM-19
Our Price: $13.97
Retail: $19.99
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GeneralAire FP12020X5 MERV 8 AC Filter Media 12-Pack
(4528)

The GeneralAire FP12020X5 MERV 8 AC Filter Media fits all furnaces or air conditioners that require the following size filter: 20" x 20" x 5" This GeneralAire FP12020x5 filter media is rated MERV 8. The GeneralAire FP12020X5 MERV 8 AC Filte


Special Order. Ships in 7 days.
GeneralAire FP12020X5 MERV 8 AC Filter Media
Our Price: $239.88

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Lennox X8346 MERV 16 Filter Upgrade Kit
(X8346)

The Lennox X8346 MERV 16 Filter Upgrade Kit is the correct upgrade for the following whole-house purification system: Lennox PureAir PCO 12C This Lennox upgrade kit contains 4 PureAir UV-A lamps, and 1 PureAir MERV 16 filter. This upgrade kit

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Special Order. Ships in 4 days.
Lennox X8346 MERV 16 Filter Upgrade Kit
Our Price: $188.19
Retail: $215.00
You Save 12%!

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Lennox X8347 MERV 16 Filter Upgrade Kit
(X8347)

The Lennox X8347 is the correct replacement for the following air cleaner: Lennox PureAir Healthy Climate PCO-12C Air Purification System

Free shipping within the continental United States!

Special Order. Ships in 4 days.
Lennox X8347 MERV 16 Filter Upgrade Kit
Our Price: $325.99
Retail: $326.95
You Save 0%!

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Lennox X7751 HCC20-28 Replacement Filter Cabinet
(X7751)

The Lennox X7751 replacement Healthy Climate Cabinet is used in air conditioning systems to provide whole house filtration. The metal construction provides durability for year round home comfort with little maintenance. The unit is not powered for r

Free shipping within the continental United States!

Special Order. Ships in 5 days.
Lennox X7751 HCC20-28 Replacement Filter Cabinet
Our Price: $299.95
Retail: $349.99
You Save 14%!

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Lennox X6661 Healthy Climate Filter Cabinet
(X6661)

The Lennox X6661 Healthy Climate Filter Cabinet is a replacement filter cabinet for Lennox Healthy Climate air cleaner models HC10 and HC 16. This air filter cabinet measures approximately 20x25x5 and is also known as the HCC20-28.

Free shipping within the continental United States!

Special Order. Ships in 8 days.
Lennox X6661 Healthy Climate Filter Cabinet
Our Price: $99.75
Retail: $120.95
You Save 18%!

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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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