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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:


Aprilaire 4896 Door Seal for 1413 Upgrade Kit 20pk 20-Pack
(Aprilaire 4896)

The Aprilaire 4896 Door Seal for 1413 Upgrade Kit is a replacement door seal for the Aprilaire 1413 Upgrade kit, which is used with the Spacegard 2400 and Aprilaire 2400 air cleaner models. This door seal is constructed with styrofoam and is fully f


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Aprilaire 4896 Door Seal for 1413 Upgrade Kit 20pk
Our Price: $849.00

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Goodman GDMHEPA400 Whole House HEPA Air Purifier
(GDMHEPA400)

The Goodman GDMHEPA400 Whole House HEPA Air Purifier is a high-efficiency air purifier is a True HEPA air cleaner that is engineered to improve the quality of indoor air.

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Special Order. Ships in 10 days.
Goodman GDMHEPA400 Whole House HEPA Air Purifier
Our Price: $340.99
Retail: $399.99
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Trion 22x16 Charcoal Filter - 227833-002
(227833-002)

The Trion 22x16 Charcoal Filter - 227833-002 measures 22" x 16" and fits select air cleaner models from Trion. This Trion filter is constructed with activated charcoal which absorbs odors and cleans air. This Trion air filter replacement filter shou


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Trion 22x16 Charcoal Filter - 227833-002
Our Price: $42.12
Retail: $49.99
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Trion 227833-006 Charcoal After Filter for HE20x20
(227833-006)

The Trion 227833-006 Charcoal After Filter for HE20x20 is a replacement charcoal filter for the Trion HE20X20 Electronic Air Cleaner. This Trion filter replacement features activated charcoal for the removal of airborne odors in your home. This acti


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Trion 227833-006 Charcoal After Filter for HE20x20
Our Price: $66.99
Retail: $69.99
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Trion 227833-010 FM 500E Charcoal Filter
(227833-010)

The Trion 227833-010 FM 500E Charcoal Filter is a replacement charcoal filter for the Trion FM500EElectronic Air Cleaner. This Trion filter replacement features activated charcoal for the removal of airborne odors in your home. This activated charco


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Trion 227833-010 FM 500E Charcoal Filter
Our Price: $26.13
Retail: $29.99
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Trion 320283-001 17x4 Charcoal Filter
(320283-001)

The Trion 320283-001 17x4 Charcoal Filter is a replacement air filter for select Trion air cleaner models. This Trion air filter replacement features activated charcoal for the removal of airborne odors in your home. This activated charcoal filter s


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Trion 320283-001 17x4 Charcoal Filter
Our Price: $24.51
Retail: $29.99
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Trion 320283-002 TTM33 Charcoal Filter
(320283-002)

The Trion 320283-002 TTM33 Charcoal Filter is a replacement air filter for the Trion TTM33 that measures 18" x 24". This Trion filter features activated charcoal which absorbs unpleasant odors in your air so you can breathe easily. This activated ch


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Trion 320283-002 TTM33 Charcoal Filter
Our Price: $61.27

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Trion 320283-003 19x19 Charcoal Filter
(320283-003)

The Trion 320283-003 19x19 Charcoal Filter measures 19" x 19". This Trion air filter replacement features activated charcoal which absorbs unpleasant odors in your air so you can breathe easily. This activated charcoal air filter should be replaced

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Trion 320283-003 19x19 Charcoal Filter
Our Price: $94.97
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.


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Magnetic Vent Cover HVAC Air Filter 4x18
Our Price: $1,095.00

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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.


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Magnetic Vent Cover HVAC Air Filter 8x18
Our Price: $976.50

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Trion 4008 Humidifier Filter Pad Replacement
(Trion 4008)

The Trion 4008 Humidifier Filter Pad Replacement is a replacement filter pad for the Herrmidifier Model 4000 and 4000C Humidifiers. This Trion humidifier filter measures approximately 15.5 inches x 11.25 inches x 1.25 inches. This Trion humidifier p


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Trion 4008 Humidifier Filter Pad Replacement
Our Price: $31.99
Retail: $39.99
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Hamilton Humidifier Evaporator Pad EP-037 14-Pack
(EP-037)

The Hamilton EP-037 is the correct replacement for the following model of humidifier: Hamilton 12HF The Hamilton Humidifier Evaporator Pad EP-037 collects moisture in the humidifier, converting it into humidity in your indoor air. This humidif

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Hamilton Humidifier Evaporator Pad EP-037 14-Pack
Our Price: $252.86
Retail: $419.86
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Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1 4-Pack
(BAYFTAH26P4A)

The Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1 is a furnace air filter that fits several electronic and media air cleaner models from Trane. This Trane air filter boasts a MERV 8 rating for the reduction of particulates in your air, including


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Trane BAYFTAH26P4A Pleated 1 inch Filter 26x21x1
Our Price: $215.20

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General Aire 3-Position Switch -Black- H9-0219
(4718)

The GeneralAir H9-0219 Black, 3-Position Switch is a replacement part attached to the power control board & transformer assembly on General Aire SSCB7-X and SSCB15-X Electronic Air Cleaner systems.


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General Aire 3-Position Switch -Black- H9-0219
Our Price: $51.99
Retail: $59.99
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General Aire Fibreboard C5-0526
(4719)

GeneralAire C5-0526 Fiberboard is an internal part attached to the power control board and transformer assembly on GeneralAir SSCB15-X and SSCB7-X Air Cleaner systems.


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General Aire Fibreboard C5-0526
Our Price: $41.99
Retail: $49.99
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General Aire 24V Transformer C5-074D
(4723)

The GeneralAire 4723 fits the following models of air cleaners: GeneralAire SSCB7-WHT GeneralAire SSCB7W-R GeneralAire SSCB15-WHT GeneralAire SSCB15W-R The General Aire 24V Transformer C5-074D is one of the air cleaner's electronic parts. T


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General Aire 24V Transformer C5-074D
Our Price: $41.99
Retail: $49.99
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General Aire 3-Position Switch -Gray- H9-0220
(4717)

The General Aire 3-Position Switch -Gray- H9-0220 fits the following air cleaners: GeneralAire SSCB7-WHT GeneralAire SSCB7W-R GeneralAire SSCB15-WHT GeneralAire SSCB15W-R This GeneralAire part 4717 is the air cleaner's 3-position switch and


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General Aire 3-Position Switch -Gray- H9-0220
Our Price: $51.99
Retail: $59.99
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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


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GeneralAire 100329 Ventilator Filter Replacement
Our Price: $51.99
Retail: $69.99
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GeneralAire 201-12880 MERV 11 Filter Media 9-Pack
(4050)

The GeneralAire 201-12880 is a compatible replacement for the following air cleaners: Aprilaire 2200 Air Cleaner Aprilaire 2250 Air Cleaner


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GeneralAire 201-12880 MERV 11 Filter Media
Our Price: $449.91

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Essick Air 1102 Electrostatic and Carbon PreFilter 6-Pack
(1102SS)

The Essick Air 1102 Electrostatic and Carbon PreFilter is a replacement electrostatic carbon pre-filter for the Bemis/Esssics 200 001 HEPA Air Purifier. This pre-filter protects the life of your air purifier's HEPA filters by trapping larger particl


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Essick Air 1102 Electrostatic and Carbon PreFilter
Our Price: $89.70

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GeneralAire FP2025X5 MERV 8 AC Filter Media 12-Pack
(4526)

The GeneralAire FP2025X5 MERV 8 AC Filter Media is a flatpac expandable replacement filter with a MERV 8 rating. This expandable, high capacity, depth loading fiberglass filter that allows for reduced and efficient storage.


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GeneralAire FP2025X5 MERV 8 AC Filter Media
Our Price: $263.88

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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: $263.88

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GeneralAire 14003 Replacement Air Cleaner Cabinet
(4505)

The GeneralAire 14003 Replacement Air Cleaner Cabinet fits the following models of air cleaners: GeneralAire MAC2000 GeneralAire MAC2020 GeneralAire MAC1400 GeneralAire MAC1200 This GeneralAire MAC2000 air cleaner part is the air cleaner's


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GeneralAire 14003 Replacement Air Cleaner Cabinet
Our Price: $61.99
Retail: $69.99
You Save 11%!

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GeneralAire Air Cleaner Prefilter R2-0855
(4782)

The GeneralAire Air Cleaner Prefilter R2-0855 is the correct replacement prefilter for the following model of air cleaner: GeneralAire GA50A22 This GeneralAire air cleaner prefilter measures 20" x 10 1/2". The GeneralAire R2-0855 is also known


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GeneralAire Air Cleaner Prefilter R2-0855
Our Price: $31.99
Retail: $39.99
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General Aire Air Cleaner Prefilter G8-0885
(4783)

The General Aire Air Cleaner Prefilter G8-0885 is a replacement air filter for the GeneralAire GA52F32 Grill Mount Air Cleaner. The G8-0885 prefilter captures large airborne particles within your home and sends the smaller particles to the main air


Special Order. Ships in 7 days.
General Aire Air Cleaner Prefilter G8-0885
Our Price: $31.99
Retail: $39.99
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