Filters Fast Logo Header
RETURNING CUSTOMER?
SIGN IN. CONFIRM ORDER. DONE.
Free Shipping on orders over $75 | FREE 365-DAY RETURNS

Find Replacement Air Filters Fast & Easy!

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.

Shop all Air Filter Brands

Popular Air Filter Brands

Air Filter FAQ

Can I use the same air filter for both heat and AC?
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?
6-Pack Filters Graphic

Air Filters full product list:


GeneralAire 4367 Replacement for GeneralAire 4354 - GA100A11
In Stock!
Ships in 1 business day

Retail: $45.99

Our Price: $39.99

Save 13%!

Aprilaire 5153 EZ Kleen Filter Replacement - 2-Pack
Special Order.
Ships in 5 to 6 days.

Retail: $44.99

Our Price: $39.95

Save 11%!

Lennox X5425 MERV 16 Pleated Furnace Filter Media
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 3 to 4 business days.

Retail: $143.99

Our Price: $120.95

Save 16%!

Lennox X8345 PureAir PCO-20C MERV 16 Upgrade Kit
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $490.99

Our Price: $350.95

Save 29%!

Holmes HAPF41 Air Purifier Carbon Prefilter
Special Order.
Ships in 5 to 6 days.

Our Price: $21.96

Carrier FILCCCAR0024 Air Purifier Filter 2-Pack
FREE SHIPPING!

within the continental U.S.

Special Order.
Ships in 5 to 6 days.

Retail: $95.99

Our Price: $80.95

Save 16%!

FiltersFast 23500 Replacement for Honeywell 23500
In Stock!
Ships in 1 business day

Retail: $79.99

Our Price: $69.95

Save 13%!

Aprilaire 261 Spacegard 2600 Filter Media Replacement
In Stock!
Ships in 1 business day

Retail: $85.99

Our Price: $64.99

Save 24%!

BestAir R14ALLM Replacement For Honeywell 32001 2-Pack
In Stock!
Ships in 1 business day

Retail: $24.99

Our Price: $19.95

Save 20%!

Lennox 72H02 Whole House System Air Filter
In Stock!
Ships in 4 to 5 business days.

Retail: $30.99

Our Price: $20.99

Save 32%!

Lennox Y2920 Whole House Air Filter Cabinet - Genuine Lennox Part
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $119.99

Our Price: $100.95

Save 16%!

Lennox X8347 MERV 16 Filter Maintenance Kit for PCO-12C
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $347.99

Our Price: $310.95

Save 11%!

Lennox X8348 PCO-20C MERV 10 Filter Maintenance Kit
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 2 to 3 business days.

Retail: $355.99

Our Price: $300.95

Save 15%!

Duracraft 5010 Replacement for Honeywell 10590 HEPA Filter
In Stock!
Ships in 1 business day

Retail: $59.99

Our Price: $39.99

Save 33%!

GeneralAire 4366 Replacement for GeneralAire 4352 - GA100A29
In Stock!
Ships in 1 business day

Retail: $59.99

Our Price: $38.99

Save 35%!

Totaline P102-1620 16x20 MERV 11 Filter
In Stock!
Ships in 1 to 2 business days.

Retail: $46.99

Our Price: $42.99

Save 9%!

FiltersFast FFC16205HONM8 Replacement for Honeywell FC100A1003 MERV8, 16x20x5 - 2-Pack
In Stock!
Ships in 1 to 2 business days.

Retail: $60.99

Our Price: $50.95

Save 16%!

FiltersFast FFC14275TRNM13 Replacement for Trane FFC14275TRNM13 14x27x5 Air Filter
In Stock!
Ships in 1 to 2 business days.

Our Price: $60.98

Honeywell F100F2044 25x20 Whole House Air Cleaner
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 5 to 6 business days.

Retail: $145.99

Our Price: $124.69

Save 15%!

Honeywell F100F2036 20x20 Whole Home Air Purifier
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $249.99

Our Price: $159.95

Save 36%!

Filtrete One Inch Odor Air Filter - 20 x 30 x 1
FREE SHIPPING!

within the continental U.S.

Special Order.
Ships in 5 to 6 days.

Our Price: $119.96

Filtrete Home Odor Air Filter- 14 x 20 x 1 - 4-Pack
Special Order.
Ships in 5 to 6 days.

Retail: $149.99

Our Price: $119.96

Save 20%!

Totaline P102-1625 16x25 MERV 11 Filter
In Stock!
Ships in 1 to 2 business days.

Retail: $50.99

Our Price: $43.95

Save 14%!

Totaline P102-2020 20x20 MERV 11 Filter
In Stock!
Ships in 2 to 3 business days.

Retail: $49.99

Our Price: $44.99

Save 10%!

Lennox X8313 Healthy Climate HCXF20-16 MERV 16 Expandable Filter
FREE SHIPPING!

within the continental U.S.

In Stock!
Ships in 1 to 2 business days.

Retail: $132.99

Our Price: $110.95

Save 17%!

Page 1 2 3 4 5 6 7 8 9 10 11 12 13 [ Back | Next ]