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Replacement HVAC, Furnace and AC Filter Sizes

Find your perfect fit from our wide range of furnace and A/C filters. Simply search for your specific size below. Can’t find what you need? We carry every size imaginable—explore our Exact Filters or customize your own with our Custom Furnace and A/C Filter options.

Common HVAC Filter Sizes

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1" Filters

2" Filters

4" & Up Filters

Can’t Find Your Size?

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Premium HVAC Filters for Better System Protection and Indoor Air Quality

Best Sellers

$ 103.99 - $ 266.99
$ 103.99 - $ 266.99
$ 103.99 - $ 266.99
$ 103.99

AAF Flanders PREpleat LPD Standard Capacity (12 Filters)

AAF Flanders

We’re excited to introduce the newly improved AAF Flanders PREpleat LPD (Low Pressure Drop) SC (Standard Capacity) filter, now featuring a MERV 10 ...

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$ 103.99 - $ 266.99
$ 103.99 - $ 266.99
$ 103.99 - $ 266.99
$ 103.99
$ 103.99 - $ 289.99
$ 103.99 - $ 289.99
$ 103.99 - $ 289.99
$ 103.99

Koch Multi-Pleat XL8 Standard Capacity MERV 8 (12 Filters)

Koch

Standard Capacity Extended Surface Pleated Panel Filter Features Upgrade from standard pleated filters MERV 8 and MERV 8...

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$ 103.99 - $ 289.99
$ 103.99 - $ 289.99
$ 103.99 - $ 289.99
$ 103.99
$ 67.99 - $ 81.99
$ 67.99 - $ 81.99
$ 67.99 - $ 81.99
$ 67.99

MECH 8 Aluminum Rust Resistant Permanent Filter

Smith Filter Corporation

The MECH 8 is a top-performing washable filter, independently tested to a MERV 8 rating. It features a unique media layer, designed to trap particl...

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$ 67.99 - $ 81.99
$ 67.99 - $ 81.99
$ 67.99 - $ 81.99
$ 67.99
Flanders AAF Basic Filter Flanders Precisionaire EZ-Flow II Filters (12 Pack)
$ 59.99 - $ 149.99
$ 59.99 - $ 149.99
$ 59.99 - $ 149.99
$ 59.99

EZ-Flow Basic Fiberglass Filters (12 Pack)

AAF Flanders

The EZ Flow II filter frame is made from heavy chipboard in a one-piece design that eliminates corner separation. The EZ Flow II filter is made to ...

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$ 59.99 - $ 149.99
$ 59.99 - $ 149.99
$ 59.99 - $ 149.99
$ 59.99
$ 111.99 - $ 302.99
$ 111.99 - $ 302.99
$ 111.99 - $ 302.99
$ 111.99

AAF Flanders PREpleat LPD High Capacity (12 Filters)

AAF Flanders

We're pleased to announce the updated AAF Flanders PREpleat LPD (Low Pressure Drop) HC (High Capacity) filter, now featuring a MERV 10 rating, an u...

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$ 111.99 - $ 302.99
$ 111.99 - $ 302.99
$ 111.99 - $ 302.99
$ 111.99
$ 123.99 - $ 284.99
$ 123.99 - $ 284.99
$ 123.99 - $ 284.99
$ 123.99

AAF Flanders PREpleat MERV 11 Standard Capacity (12 Filters)

AAF Flanders

The PREpleat M11 SC pleated panel filter enables a significant upgrade in collection efficiency over existing MERV 8 products. A 25–30% average eff...

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$ 123.99 - $ 284.99
$ 123.99 - $ 284.99
$ 123.99 - $ 284.99
$ 123.99
$ 195.99 - $ 427.99
$ 195.99 - $ 427.99
$ 195.99 - $ 427.99
$ 195.99

AAF Flanders PREpleat MERV 13 Extended Surface (12 Filters)

AAF Flanders

The PREpleat M13 pleated filter has a low initial resistance and supports achievement of LEED® credits by significantly improving Indoor Air Qualit...

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$ 195.99 - $ 427.99
$ 195.99 - $ 427.99
$ 195.99 - $ 427.99
$ 195.99
$ 95.99 - $ 182.99
$ 95.99 - $ 182.99
$ 95.99 - $ 182.99
$ 95.99

NaturalAire Standard MERV 8 Filters (12 pack)

AAF Flanders

The NaturalAire Standard air filter removes dramatically more potentially harmful airborne particles, compared to basic fiberglass air filters. It ...

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$ 95.99 - $ 182.99
$ 95.99 - $ 182.99
$ 95.99 - $ 182.99
$ 95.99
$ 137.99 - $ 261.99
$ 137.99 - $ 261.99
$ 137.99 - $ 261.99
$ 137.99

NaturalAire Microparticle MERV 10 Filters (12 pack)

AAF Flanders

NaturalAire Microparticle Pleated Air Filter, MERV 10 Removes additional airborne allergens and contaminants, to help protect the ones you love. M...

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$ 137.99 - $ 261.99
$ 137.99 - $ 261.99
$ 137.99 - $ 261.99
$ 137.99
$ 174.99 - $ 262.99
$ 174.99 - $ 262.99
$ 174.99 - $ 262.99
$ 174.99

NaturalAire Healthy Ultra MERV 13 Filters (12 pack)

AAF Flanders

NaturalAire Healthy Ultra Pleated Air Filter, MERV 13 Hospital-grade air filtration provides maximum protection for your home’s environment. Hospi...

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$ 174.99 - $ 262.99
$ 174.99 - $ 262.99
$ 174.99 - $ 262.99
$ 174.99
$ 57.14 - $ 112.99
$ 57.14 - $ 112.99
$ 57.14 - $ 112.99
$ 57.14

NaturalAire Odor Eliminator Filters with Baking Soda (4 Pack)

AAF Flanders

The NaturalAire Odor Eliminator with Baking Soda air filter neutralizes common household odors. It uses the power of baking soda to rid your home o...

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$ 57.14 - $ 112.99
$ 57.14 - $ 112.99
$ 57.14 - $ 112.99
$ 57.14
$ 57.99 - $ 69.99
$ 57.99 - $ 69.99
$ 57.99 - $ 69.99
$ 57.99

Thrift Aire Aluminum Rust Resistant Permanent Filter

Smith Filter Corporation

The Thrift Aire Filter is a lightweight, tough aluminum filter built for great performance. It uses layers of expanded aluminum, stacked smartly t...

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$ 57.99 - $ 69.99
$ 57.99 - $ 69.99
$ 57.99 - $ 69.99
$ 57.99
$ 114.99 - $ 124.99
$ 114.99 - $ 124.99
$ 114.99 - $ 124.99
$ 114.99

AAF Flanders Nested Glass EZ-Green Filters (24 Filters)

AAF Flanders

This is a standard grade furnace filter of the same type that has been protecting furnaces and central air conditioners around the world for over 5...

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$ 114.99 - $ 124.99
$ 114.99 - $ 124.99
$ 114.99 - $ 124.99
$ 114.99
$ 152.99 - $ 465.99
$ 152.99 - $ 465.99
$ 152.99 - $ 465.99
$ 152.99

AAF Flanders PREpleat Activated Carbon Odor Control (12 Filters)

AAF Flanders

PREpleat AC Carbon Pleated Filters The World Leader in Clean Air Solutions PREpleat AC carbon pleated filters are designed to provide a fast and ef...

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$ 152.99 - $ 465.99
$ 152.99 - $ 465.99
$ 152.99 - $ 465.99
$ 152.99
$ 89.99 - $ 372.99
$ 89.99 - $ 372.99
$ 89.99 - $ 372.99
$ 89.99

AAF Flanders PerfectPleat High Capacity MERV 8 (12 Filters)

AAF Flanders

PerfectPleat HC M8 The PerfectPleat HC M8 filter is designed to consistently increase efficiency throughout the service life of the filter. The Per...

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$ 89.99 - $ 372.99
$ 89.99 - $ 372.99
$ 89.99 - $ 372.99
$ 89.99
$ 61.99 - $ 75.99
$ 61.99 - $ 75.99
$ 61.99 - $ 75.99
$ 61.99

Electrostatic Aluminum Rust Resistant Permanent Filter

Smith Filter Corporation

The Electrostatic Filter harnesses passive electrostatic attraction to capture airborne particles effectively. It’s built with alternating layers o...

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$ 61.99 - $ 75.99
$ 61.99 - $ 75.99
$ 61.99 - $ 75.99
$ 61.99
$ 59.99 - $ 277.99
$ 59.99 - $ 277.99
$ 59.99 - $ 277.99
$ 59.99

Koch Disposable Fiberglass Panel (12 Filters)

Koch

Disposable Panel Filters for Commercial, Industrial & Residential Use KOCH Disposable Fiberglass Panel Filters are versatile and suitable for ...

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$ 59.99 - $ 277.99
$ 59.99 - $ 277.99
$ 59.99 - $ 277.99
$ 59.99
$ 69.99 - $ 229.99
$ 69.99 - $ 229.99
$ 69.99 - $ 229.99
$ 69.99

Koch Disposable Polyester Panel (12 Filters)

Koch

Disposable Panel Filters for Commercial, Industrial & Residential Use KOCH Disposable Polyester Panel Filters are versatile and suitable for a...

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$ 69.99 - $ 229.99
$ 69.99 - $ 229.99
$ 69.99 - $ 229.99
$ 69.99
20x20x1 AAF Flanders Basic Pleated MERV 6 Air Filters 81555.012020 (12 pack)
Save up to 13% Save %
$ 96.99 - $ 154.99
$ 96.99 - $ 154.99
$ 96.99
$ 79.99 - $ 134.99
$ 79.99 - $ 134.99
$ 79.99

AAF Flanders Basic Pleated MERV 6 Air Filters (12 pack)

AAF Flanders

AAF Flanders Basic Pleated MERV 6 Air Filter - Limited Stock! Don’t miss out on our last remaining inventory of the AAF Flanders Basic Pleated MERV...

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$ 96.99 - $ 154.99
$ 96.99 - $ 154.99
$ 96.99
$ 79.99 - $ 134.99
$ 79.99 - $ 134.99
$ 79.99
Save up to 13% Save %
$ 295.99 - $ 531.99
$ 295.99 - $ 531.99
$ 295.99 - $ 531.99
$ 295.99

Custom Size MERV 13 Extended Surface Pleated Filters

AAF Flanders

The PREpleat M13 pleated filter has a low initial resistance and supports achievement of LEED® credits by significantly improving Indoor Air Quali...

View full details
$ 295.99 - $ 531.99
$ 295.99 - $ 531.99
$ 295.99 - $ 531.99
$ 295.99
$ 218.99 - $ 364.99
$ 218.99 - $ 364.99
$ 218.99 - $ 364.99
$ 218.99

Custom Size Koch Disposable Panel (12 Filters)

Koch

Disposable Panel Filters for Commercial, Industrial & Residential Use KOCH Disposable Panel Filters are versatile and suitable for a wide rang...

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$ 218.99 - $ 364.99
$ 218.99 - $ 364.99
$ 218.99 - $ 364.99
$ 218.99
$ 208.99 - $ 208.99
$ 208.99
$ 208.99 - $ 208.99
$ 208.99

Custom Size NaturalAire MERV 8 Filters (12 Filters)

AAF Flanders

The NaturalAire Standard MERV 8 air filter removes dramatically more potentially harmful airborne particles, compared to basic fiberglass air filte...

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$ 208.99 - $ 208.99
$ 208.99
$ 208.99 - $ 208.99
$ 208.99
Naturalaire MERV 10 air filters custom size
$ 228.99 - $ 228.99
$ 228.99
$ 228.99 - $ 228.99
$ 228.99

Custom Size NaturalAire MERV 10 Filters (12 Filters)

AAF Flanders

The NaturalAire Microparticle air filter removes potentially harmful airborne particles to keep the air in your home or office clean and healthier....

View full details
$ 228.99 - $ 228.99
$ 228.99
$ 228.99 - $ 228.99
$ 228.99
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Achieving Superior Air Quality

RememberTheFilter.com is the premier destination for both commercial and residential HVAC filters, offering an unmatched selection that caters to every unique need. With a vast inventory of sizes, including hard-to-find custom options, we ensure that every customer finds the exact filter they require. Our commitment to quality is evident in every product we sell, ensuring optimal performance and longevity of your HVAC systems. Coupled with convenient, direct-to-door free shipping and superior customer service, RememberTheFilter.com stands out as the go-to source for all your HVAC filter needs. Choose us for a seamless, reliable, and efficient solution to improve your air quality and system efficiency.

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