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

Filterbuy 20x22x1 Air Filter MERV 8 Odor Eliminator (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement with Activated Carbon (Actual Size: 19.50 x 21.50 x 0.75 Inches)

Filterbuy 20x22x1 Air Filter MERV 8 Odor Elim...

Filterbuy

Product Review Score

4.28 out of 5 stars

226 reviews

$47.22

Filterbuy 20x20x5 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Amana, Coleman, Goodman, Maytag, York, and More (Actual Size: 20.25 x 20.75 x 5.25)

Filterbuy 20x20x5 Air Filter MERV 8 Dust Defe...

Filterbuy

Product Review Score

4.25 out of 5 stars

231 reviews

$63.76

Filterbuy 22x24x5 Air Filter MERV 11 Allergen Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Amana, Goodman, and Five Seasons (Actual Size: 22.06 x 23.94 x 5.25 Inches)

Filterbuy 22x24x5 Air Filter MERV 11 Allergen...

Filterbuy

Product Review Score

4.59 out of 5 stars

181 reviews

$104.08

Envirowise 16.7" x 26" x 4.7" Quikbox Filter Media 2-Pack, MERV 11

Envirowise 16.7" x 26" x 4.7" Quikbox Filter...

Product Review Score

4.58 out of 5 stars

72 reviews

$66.21

Trane Parts 2-Pack MERV 11, OEM Trane FLRQB5FR17M11 TFM175B0FR0 - QuikBox Replacement Media Filter 16.7'' x 26'' x 4.7''

Trane Parts 2-Pack MERV 11, OEM Trane FLRQB5F...

Product Review Score

4.38 out of 5 stars

40 reviews

$66.21

Lennox Y6604- PureAir PCO3-20-16 MERV 16 Filter- 20" x 26" x 5"

Lennox Y6604- PureAir PCO3-20-16 MERV 16 Filt...

Product Review Score

4.09 out of 5 stars

37 reviews

$135.74

2-Pack MERV 11, OEM Trane FLRQB5FR17M11 TFM175B0FR0 - QuikBox Replacement Media Filter 16.7" x 26" x 4.7"

2-Pack MERV 11, OEM Trane FLRQB5FR17M11 TFM17...

Product Review Score

4.99 out of 5 stars

138 reviews

$69.13

Trane Parts Envirowise Quikbox Filter Media 2-Pack, MERV 11 FLRQB5FR24M11_2PK, 23.7*26*4.7 inches

Trane Parts Envirowise Quikbox Filter Media 2...

Product Review Score

4.31 out of 5 stars

167 reviews

$73.48

17x26x4 MERV 8 Lennox X6664 Aftermarket Filters (2 Pack)

17x26x4 MERV 8 Lennox X6664 Aftermarket Filte...

Spiropure

Product Review Score

4.74 out of 5 stars

203 reviews

$62.49

Filterbuy 17x26x4 Air Filter MERV 8 Dust Defense (1-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Lennox (Actual Size: 16.56 x 25.94 x 4.13 Inches)

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Product Review Score

4.55 out of 5 stars

127 reviews

$57.03

Filterbuy 17x26x4 Air Filter MERV 13 Optimal Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Lennox (Actual Size: 16.56 x 25.94 x 4.13 Inches)

Filterbuy 17x26x4 Air Filter MERV 13 Optimal...

Filterbuy

Product Review Score

4.65 out of 5 stars

197 reviews

$87.40

Filterbuy 17x26x4 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement for Lennox (Actual Size: 16.56 x 25.94 x 4.13 Inches)

Filterbuy 17x26x4 Air Filter MERV 13 Optimal...

Filterbuy

Product Review Score

4.89 out of 5 stars

9 reviews

$164.08

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.