Best Tier1 Furnace Filters in 2026

OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. home air filters for your furnace, air conditioner or HVAC system

DESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through

ATTRACTS AND CAPTURES particles such as lint, pollen, dust, pet dander, smoke and smog

BUY WITH CONFIDENCE This genuine AprilAire 213 replacement air filter was designed and manufactured in the USA by AprilAire – the leader in indoor air quality solutions – to optimize the performance of your AprilAire Air Purifier Model: 1210, 1620, 2210, 2216, 3210, 4200, AprilAire or Space Gard 2200 with upgrade kit

CREATE A HEALTHIER HOME by preventing airborne allergens from circulating through the air in your home. The 213 AprilAire replacement air filter removes airborne allergens as they pass through the MERV 13 filter including dust pollen, mold spores, bacteria, pet dander, and dust mites

BETTER PERFORMANCE thanks to the patented AprilAire Self-Seal Technology which minimizes the amount of air bypassing the filter

20x20x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 19.50" x 19.50" x 0.75")

MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow

High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products lifespan by 3 times that of fiberglass models

OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. home air filters for your furnace, air conditioner or HVAC system

DESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through

ATTRACTS AND CAPTURES particles such as lint, pollen, dust, pet dander, smoke and smog

Honeywell FC100A1029 16x25x4 Replacement Filter, Minimum Efficiency Reporting Value (MERV) 11

High efficiency media filter captures particles as small as 0.3 micron

Requires no maintenance except periodic (every 6-12 months), super easy, in-and-out media filter replacement.

MERV 11 filtration

Nominal: 20" x 20" x 5"

Actual: 20 11/16" x 19 3/4" x 5"

Nominal Size: 20 x 20 x 5 H, Actual Size: 19 5/8 x 19 7/8 x 4 3/8 (19.63 x 19.88 x 4.38)

Measure your air filter for the exact size and compare it to our actual size to ensure proper fit.

Replaces Honeywell 20x20x4 and filters with an MPR rating with an actual depth of 4 3/8 and ideal for high efficiency air filtration and those with moderate allergies

Actual Size: 19 1/8 inches (length) x 19 7/8 inches (width) x 4 1/4 inches (depth)

Effective Filtration: MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, lint, debris, mold, pollen, pet dander, and dust mites

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 19 3/4 inches (length) x 24 1/4 inches (width) x 4 15/16 inches (depth)

Effective Filtration: MERV 13 synthetic media (comparable with MPR 1500 - 1900 & FPR 10) protects homes from the smallest particles and bacteria (.03 - 1 microns)

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 19 1/8 inches (length) x 19 7/8 inches (width) x 4 1/4 inches (depth)

Effective Filtration: MERV 11 synthetic media (comparable with MPR 1000 - 1200 & FPR 7) protects homes from pets, allergies, and more

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Patented Filter Technology: Castle Filters use 3 layers of ¼-inch open-celled foam, with a patented tacky center layer that catches dust like fly paper. Proudly made in USA - US patent #10,183,249 B2

MERV 8: The High-Flow MERV 8 air filter effectively removes 93% of the most harmful dust particles and offers superior protection of your equipment and home while still allowing maximum air-flow

HVAC Filter: Castle Filters have 400% more surface area for dust and other particles to collect. The internal foam is treated with a sticky material to collect more dust while letting the air pass through

Universally Compatible- This air conditioner, furnace and HVAC filter works with almost any brand. It is comparable to the 3M Filtrete MPR 600 Dust and Pollen, Filterbuy AFB Silver and the Honeywell FPR 5 models.

Create a Cleaner Environment- Entrap air particles that bring harm to you and your loved ones with our Merv 8 pleated air filters that capture dust, lint and pollen. Nominal Size: 16x16x1, Actual Size: 15.75x15.75x0.75

Quality That Counts- Our expertly designed pleated filters boast more pleats than your average retail filter, boosting airflow and overall efficiency. Each high-quality filter is meticulously made in the U.S.A. with attention to detail, ensuring optimal performance for your residential home.

The LAST AIR FILTER YOU WILL EVER BUY: Washable furnace filter for long-term home HVAC filter savings

SAVE MONEY: Save $30 annually with reusable air filter compared to disposable, one time use filters

INCREASE HVAC EFFICIENCY: Excellent airflow to help maintain HVAC system efficiency

NO SCISSORS REQUIRED: Pre-Cut for Exact Fitment 14”x20”, 16”x20”, 16”x26”, 19-1/2”x21-3/4”, 19-1/2”x28”, 20"x30"

ORIGINAL NATURAL FIBER HOGS HAIR REPLACEMENT FILTER – High quality UL 900 classified original replacement as compared to synthetic material alternatives

MADE IN USA: High Grade Natural Fiber Furnace Door Replacement Filter for Mobile, Manufactured and Modular Homes Furnace / Air Conditioners

Designed to Fit: Fits as Tier1 Replacement for Aprilaire Air Cleaner Models 2200 & 2250.

Actual Size: 19 3/4 inches (length) x 24 1/4 inches (width) x 6 3/8 inches (depth).

High Efficiency Filtration: Merv 11 Rating to reduce airborne particles like dust, pet dander, and more.

Quality alternative to the OEM filter that offers more affordability without compromising filtration performance or efficiency.

Compatible with Honeywell / Trane / American Standard TRN2621T1, BAYFTAH26M, BAYFTAH26M2, and FLR06074 whole house air filters.

21x26x5 NOMINAL: The actual size of this replacement filter is 25.7" x 20.1" x 5".

Actual Size: 20 1/10 inches (length) x 23 2/10 inches (width) x 5 inches (depth)

Effective Filtration: MERV 11 synthetic media (comparable with MPR 1000 - 1200 & FPR 7) protects homes from pets, allergies, and more

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Nominal Size: 16x25x4; Actual Size: 15 1/2" x 24 1/2" x 3 3/4"

Comparable to MPR 1500 to 1900 Ultimate Allergen Defense and Honeywell Allergen Elite FPR 10

Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, smoke, and bacteria.

Pack of 2 replacement air filters for furnaces, HVAC, and AC systems

Filters out and captures dust, pollen, pet dander, smoke, and other particles

Nanofiber technology captures ultrafine pollutants and offers additional reinforcement

Part Number – 203371 HVAC Furnace Aluminum Filters. 2-Pack Premium Aluminum Mesh HVAC Filter Replacements. Package Contains 2-Filters For Easy Replacement.

Quality – Proudly Made In The USA Our Compatible 203371 Aluminum Mesh Filter Is Made From A High Quality Aluminum. The Filter Contains An Exclusive Multi-Layer Aluminum Media For Maximum Filtration And Extra Durability. There Are Overlapping Joints To Stop Snagging And Tension Springs For A Compressed Fit.

Application –The Mesh Filter Is Installed In Your HVAC System And Can Be Used As A Pre Filter Or A Post Filter. Filters Are Recommended To Be Hand Washed Using A Mild Dish Detergent And Warm Water. Allow The Filter To Soak In Hot Water And Dish Detergent For Approximately 1 Hour. Then Using A Light Bristled Brush, Gently Scrub The Filters Surface. Rinse With Water And Allow Time To Dry.

Actual Size: 16 3/8 inches (length) x 21 1/2 inches (width) x 3/4 inches (depth)

Effective Filtration: MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, lint, debris, mold, pollen, pet dander, and dust mites

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Breathe In Clean Air - Maintain excellent air quality in your living space with these MERV 6 air filters.

Maintain Optimal Air Flow - Help your HVAC system function at its best each day. Measuring 20x30x1", our replacement HVAC filters without restricting airflow.

A Snug & Seamless Fit - Our thick furnace filter pads will easily fit most vents with standard dimensions. You may also cut down the filtration media to your preferred size using a pair of scissors.

Actual Size: 11 1/2 inches (length) x 19 1/2 inches (width) x 3/4 inches (depth)

Effective Filtration: MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, lint, debris, mold, pollen, pet dander, and dust mites

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 15 5/8 inches (length) x 24 1/8 inches (width) x 4 7/8 inches (depth)

Effective Filtration: MERV 13 synthetic media (comparable with MPR 1500 - 1900 & FPR 10) protects homes from the smallest particles and bacteria (.03 - 1 microns)

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 15 3/4 inches (length) x 29 3/4 inches (width) x 1 3/4 inches (depth)

Effective Filtration: MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, lint, debris, mold, pollen, pet dander, and dust mites

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 13 1/2 inches (length) x 35 1/2 inches (width) x 3/4 inches (depth)

Effective Filtration: MERV 13 synthetic media (comparable with MPR 1500 - 1900 & FPR 10) protects homes from the smallest particles and bacteria (.03 - 1 microns)

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 23 3/4 inches (length) x 24 3/4 inches (width) x 4 3/8 inches (depth)

Effective Filtration: MERV 11 synthetic media (comparable with MPR 1000 - 1200 & FPR 7) protects homes from pets, allergies, and more

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 11 1/2 inches (length) x 35 1/2 inches (width) x 3/4 inches (depth)

Effective Filtration: MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, lint, debris, mold, pollen, pet dander, and dust mites

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 15 3/4 inches (length) x 15 3/4 inches (width) x 3/4 inches (depth)

Effective Filtration: MERV 11 synthetic media (comparable with MPR 1000 - 1200 & FPR 7) protects homes from pets, allergies, and more

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models

Actual Size: 17 1/2 inches (length) x 35 1/2 inches (width) x 3/4 inches (depth)

Effective Filtration: MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, lint, debris, mold, pollen, pet dander, and dust mites

High-Quality Contruction: Features an electrostatically charged, pleated design that captures more particles and prolongs the products lifespan by 3 times that of fiberglass models