4" Air Filters

Explore our selection of 4 inch air filters designed for optimal air quality and efficiency

Discover our wide selection of 4" air filters, designed to enhance indoor air quality and promote healthier living environments. These filters are engineered to capture a variety of airborne particles, including dust, pollen, and pet dander, ensuring that you breathe cleaner air in your home or office. With easy installation options and a range of MERV ratings to suit different needs, finding the perfect air filter has never been easier.

12x20x4 Air Filter

12x24x4 Air Filter

14x20x4 Air Filter

14x25x4 Air Filter

16x20x4 Air Filter

16x25x4 Air Filter

16x28x4 Air Filter

16.7x26x4.7 Air Filter

17x26x4 Air Filter

17.5x21x4.5 Air Filter

17.7x20x4.7 Air Filter

18x20x4 Air Filter

18x24x4 Air Filter

19x20x4 Air Filter

20x20x4 Air Filter

20x23x4 Air Filter

20x24x4 Air Filter

20x25x4 Air Filter

20x30x4 Air Filter

20.2x26x4.7 Air Filter

20.7x20x4.7 Air Filter

21x21x4.5 Air Filter

21x24.5x4.5 Air Filter

21x26x4 Air Filter

22.7x20.7x4.7 Air Filter

24x24x4 Air Filter

24x25x4 Air Filter

24x30x4 Air Filter

25.5x20x4.7 Air Filter

Product List

RAYAIR SUPPLY 20x24 Replacement Filter Pads Compatible with Respicaire CG MicroCLean 95 Air Cleaner 20x24 Refills (4 Pack)

RAYAIR SUPPLY 20x24 Replacement Filter Pads C...

Product Review Score

4.6 out of 5 stars

194 reviews

$64.79

Filtrete 17x20x1 AC Furnace Air Filter, MPR 700, MERV 8, Tough on Pollen, Easy on Airflow, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2-Pack (Actual Size 16.69 x 19.69 x 0.81 in)

Filtrete 17x20x1 AC Furnace Air Filter, MPR 7...

Filtrete

Product Review Score

4.21 out of 5 stars

133 reviews

$26.89

SpiroPure 19x20x4 / 20x20x4 MERV 11 Bryant/Carrier FILXXFNC0021 Aftermarket Filters (2 Pack), White

SpiroPure 19x20x4 / 20x20x4 MERV 11 Bryant/Ca...

Spiropure

Product Review Score

4.19 out of 5 stars

206 reviews

$76.37

SpiroPure 17x26x4 MERV 13 Lennox X6664 Aftermarket Filters (2 Pack), White

SpiroPure 17x26x4 MERV 13 Lennox X6664 Afterm...

Spiropure

Product Review Score

4.37 out of 5 stars

84 reviews

$92.03

Aerostar 12x20x4 MERV 13, Pleated Air Filter, 12 x 20 x 4, Box of 4, Made in the USA

Aerostar 12x20x4 MERV 13, Pleated Air Filter,...

Aerostar

Product Review Score

4.09 out of 5 stars

11 reviews

$127.44

20x20x4 AC Furnace Air Filter Replacement - FC100A1011 HVAC Furnace Filters with Merv 11 Filter Media, AC Filter with Homequip Disposal Bag 4-Pack (Actual Size: 19.94 x 19.75 x 4.38 Inches)

20x20x4 AC Furnace Air Filter Replacement - F...

Product Review Score

4.57 out of 5 stars

122 reviews

$145.99

Filterbuy 24x30x4 Air Filter MERV 11 (MPR 1200) Allergen Defense Replacement (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters, Made in USA (Actual Size: 23.50 x 29.50 x 3.63)

Filterbuy 24x30x4 Air Filter MERV 11 (MPR 120...

Filterbuy

Product Review Score

4.22 out of 5 stars

83 reviews

$122.52

Filtrete 20x25x4 (SlimFit) AC Furnace Air Filter, MPR 1000, MERV 11, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.75 x 24.5 x 3.75 in)

Filtrete 20x25x4 (SlimFit) AC Furnace Air Fil...

Filtrete

Product Review Score

4.93 out of 5 stars

76 reviews

$63.98

Filter King 4x21x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 4 x 21 x .75"

Filter King 4x21x1 Air Filter | 4-PACK | MERV...

Filter King

Product Review Score

4.12 out of 5 stars

76 reviews

$57.63

Aerostar 20x30x1 MERV 11 Air Filter, 4 Pack Set of HVAC Furnace Filters, Electrostatic MPR 1000-1200 & FPR 7 (Actual Size: 19 3/4 x 29 3/4 x 3/4 inches)

Aerostar 20x30x1 MERV 11 Air Filter, 4 Pack S...

Aerostar

Product Review Score

4.97 out of 5 stars

21 reviews

$49.99

Filter King 14x20x1 Air Filter | 4-PACK | Carbon MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 13.5 x 19.5 x .75"

Filter King 14x20x1 Air Filter | 4-PACK | Car...

Filter King

Product Review Score

4.93 out of 5 stars

101 reviews

$74.35

20x30x5 MERV 8 Air Filter for Honeywell

20x30x5 Honeywell MERV 8 Filter

Filterbuy

Product Review Score

4.68 out of 5 stars

33 reviews

$62.11

When it comes to maintaining optimal air quality in your home or office, 4" air filters play a crucial role in capturing dust, allergens, and pollutants. Their increased surface area allows for better airflow while efficiently trapping larger particles, ensuring you breathe cleaner air. Regularly replacing your 4" air filters not only improves air quality but also prolongs the lifespan of your HVAC system, saving you money in the long run.

Our selection of 4" air filters includes various materials and filtration ratings to meet your specific needs. From standard pleated filters to high-efficiency options, each product is designed to enhance performance and provide you with peace of mind. Browse our collection today and discover the perfect air filter to keep your environment fresh and healthy.