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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


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: $251.86
Retail: $419.86
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Hamilton Humidifier Evaporator Pad EP-039 24-Pack
(EP-039)

The Hamilton EP-039 is the correct replacement for the following humidifier: Hamilton 6HP "Under the Duct" whole house drum humidifier The Hamilton Humidifier Evaporator Pad EP-039 collects moisture inside the humidifier, then converts it into


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Hamilton Humidifier Evaporator Pad EP-039
Our Price: $479.76

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Bionaire Foam Humidifier Prefilter A0327W 2-Pack
(A0327W)

The Bionaire A0327W Foam Humidifier Prefilter is used to reduce airborne particles & pollutants with Bionaire CP0305 & CP0306 humidifier systems.


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Bionaire Foam Humidifier Prefilter A0327W
Our Price: $7.98

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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.

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GeneralAire DC4E Elite Dehumidistat Control
Our Price: $200.69
Retail: $249.99
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GeneralAire TR3 Ventilator Timer Control
(4690)

The GeneralAire TR3 Ventilator Timer Control is a replacement push button timer for all GeneralAire HRV and ERV model recovery ventilators. The TR3 timer allows the user change the humidity level of the HRV and ERV units, as well as override control


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GeneralAire TR3 Ventilator Timer Control
Our Price: $34.99
Retail: $39.99
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GeneralAire 100328 Ventilator Filter Replacement
(4663)

The GeneralAire filter pads are for use on your GeneralAire Venitlator. This ventilator filter media will keep your unit running at its best. The 100328 filter media is a genuine OEM part from the manufacturer. These ventilator filter pads will comp


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GeneralAire 100328 Ventilator Filter Replacement
Our Price: $39.99
Retail: $49.99
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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: $49.99
Retail: $69.99
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GeneralAire 101804 HRV/ERV Door Switch
(4689)

The GeneralAire 101804 HRV/ERV Door Switch is the correct replacement door switch for the following models of GeneralAire energy/heat recovery ventilators: 3160 3220 8160 8220 This ventilator door switch is a genuine GeneralAire replacement


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GeneralAire 101804 HRV/ERV Door Switch
Our Price: $39.99
Retail: $49.99
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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: $29.99
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


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General Aire Air Cleaner Prefilter G8-0885
Our Price: $29.99
Retail: $39.99
You Save 25%!

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General Aire Air Cleaner On/Off Switch C5-0223
(4787)

The General Aire Air Cleaner On/Off Switch C5-0223 fits the following model of air cleaner: GeneralAire GA52F32 This GeneralAire air cleaner switch is the air cleaner's on/off switch. The GeneralAire air cleaner on/off switch C5-0223 is also k


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General Aire Air Cleaner On/Off Switch C5-0223
Our Price: $29.99
Retail: $39.99
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Lennox X6666 MERV 16 Pleated Air Filter Media 5-Pack
(X6666)

This Lennox Box Filter is a genuine MERV 16 filter. The Lennox Furnace Filter Box should only be replaced every six months.

Free shipping within the continental United States!

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Lennox X6666 MERV 16 Pleated Air Filter Media
Our Price: $499.75

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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

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Special Order. Ships in 7 days.
Lennox X7751 HCC20-28 Replacement Filter Cabinet
Our Price: $299.95
Retail: $349.99
You Save 14%!

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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

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Special Order. Ships in 6 days.
Lennox X8347 MERV 16 Filter Upgrade Kit
Our Price: $325.99
Retail: $326.95
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Lennox X8344 MERV 16 Filter Upgrade Kit
(X8344)

The Lennox X8344 MERV 16 Filter Upgrade Kit is an upgrade kit for the Lennox PCO-20C Healthy Climate PureAir Air Purification System. This Lennox PureAir filter kit includes one MERV 16 filter, also known by part number X6669, and six UV bulbs.

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Lennox X8344 MERV 16 Filter Upgrade Kit
Our Price: $273.27
Retail: $299.99
You Save 9%!

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Lennox X8307 MERV 16 Expandable Filter Kit
(X8307)

The Lennox X8307 MERV 16 Expandable Filter Kit is the correct replacement for several models of the following brands of air cleaners: Bryant & Carrier Honeywell Lennox Trion This Lennox Healthy Climate filter kit contains one filter and one

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Lennox X8307 MERV 16 Expandable Filter Kit
Our Price: $135.00
Retail: $169.99
You Save 21%!

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Lennox X8308 MERV 16 Expandable Filter Kit
(X8308)

This Lennox Expandable Filter is a genuine Lennox part. The Lennox Healthy Climate Filter is a viable replacement for several Air Cleaner Models.

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Lennox X8308 MERV 16 Expandable Filter Kit
Our Price: $129.99
Retail: $149.99
You Save 13%!

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Lennox X8304 MERV 10 Expandable Filter Kit
(X8304)

This Lennox Expandable Filter is a genuine Lennox part. The Lennox Healthy Climate Filter is a viable replacement for several Air Cleaner Models.

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Lennox X8304 MERV 10 Expandable Filter Kit
Our Price: $99.99
Retail: $104.99
You Save 5%!

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Lennox X8305 MERV 10 Expandable Filter Kit
(X8305)

The Lennox X8305 MERV 10 Expandable Filter Kit is a filter kit that includes a replacement expandable furnace filter and a replacement inner housing reusable filter frame. This expandable filter measures approximately 20x20x5.


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Lennox X8305 MERV 10 Expandable Filter Kit
Our Price: $98.99
Retail: $99.99
You Save 1%!

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Lennox 72H03 Air Cleaner Filter Cell
(72H03)

This Lennox 72H03 Air Cleaner Filter Cell is a high quality filter cell that provides effective air filtration. The Lennox 72H03 Air Cleaner Filter Cell is a Genuine Lennox replacement filter for central air cleaners.

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Special Order. Ships in 7 days.
Lennox 72H03 Air Cleaner Filter Cell
Our Price: $328.40
Retail: $349.99
You Save 6%!

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Lennox 91X23 MERV 8 Pleated Air Filters 4-Pack
(91X23)

The Lennox 91X23 is a furnace and air conditioning filter that reduces the following allergens: Dust Pollen Mold spores


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Lennox 91X23 MERV 8 Pleated Air Filters 4-Pack
Our Price: $29.95
Retail: $38.95
You Save 23%!

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Lennox 91X24 MERV 8 Pleated Air Filters 4-Pack 4-Pack
(91X24)

The Lennox 91X24 MERV 8 Pleated Air Filters 4-Pack is a set of pleated air filters that measures approximately 15x20x1 and has an a MERV 8 rating. This air conditioner filter arrives in a convenient 4 pack, which will last up to one year.


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Lennox 91X24 MERV 8 Pleated Air Filters 4-Pack
Our Price: $29.95

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Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack 3-Pack
(91X25)

The Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack is a replacement set of pleated air filters that arrives in a 4 pack. These Healthy Climate furnace filters boast a MERV 8 rating, which can reduce mold spores, dust, and tiny particles from your ai


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Lennox 91X25 MERV 8 Pleated Air Filters 4-Pack
Our Price: $29.95

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Lennox 98N43 MERV 8 Pleated Furnace Filter 4-Pack 4-Pack
(98N43)

The Lennox 98N43 MERV 8 Pleated Furnace Filters 4-Pack is the correct replacement for all furnaces that require a 20x20x1 filter. These Lennox Healthy Climate filters remove particles and bioaerosols as small as 3 microns


Special Order. Ships in 3 days.
Lennox 98N43 MERV 8 Pleated Furnace Filter 4-Pack
Our Price: $87.00

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Lennox 98N44 MERV 8 Pleated Furnace Filter 4-Pack 4-Pack
(98N44)

This Lennox 98N44 MERV 8 Pleated Furnace Filters 4-Pack package is pleated filters that capture airborne particles and allergens between three to ten microns in size. The Lennox 98N44 MERV 8 filters come in this cost-cutting 4-pack package.


Special Order. Ships in 18 days.
Lennox 98N44 MERV 8 Pleated Furnace Filter 4-Pack
Our Price: $37.95

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