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

Aerostar 16x25x4 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 15 1/2"x24 1/2"x3 3/4")

Aerostar 16x25x4 MERV 13 Pleated Air Filter,...

Aerostar

Product Review Score

4.67 out of 5 stars

189 reviews

$136.32

Nordic Pure 17_1/4x26x1ExactCustomM12-6 MERV 12 AC Furnace Filter

Nordic Pure 17_1/4x26x1ExactCustomM12-6 MERV...

Nordic Pure

Product Review Score

4.67 out of 5 stars

9 reviews

$89.11

Filterbuy 18x24x4 Air Filter MERV 13 Optimal Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 17.50 x 23.38 x 3.63 Inches)

Filterbuy 18x24x4 Air Filter MERV 13 Optimal...

Filterbuy

Product Review Score

4.64 out of 5 stars

148 reviews

$65.60

Aerostar 17 1/2 x27x5 MERV 8 Pleated Replacement Air Filter for Trane BAYFTFR17M, 2 Pack (Actual Size: 17 1/5" x 26 1/5" x 5")

Aerostar 17 1/2 x27x5 MERV 8 Pleated Replacem...

Aerostar

Product Review Score

4.63 out of 5 stars

112 reviews

$83.87

Filtrete ADP01-2PK-2 16x25x4 AC Furnace Air Filter, MPR 1000, Fits Honeywell and Lennox Devices, Micro Allergen Defense Deep Pleat, 2-Pack (Actual Dimensions 15.88 x 24.56 x 4.31), 2 Count

Filtrete ADP01-2PK-2 16x25x4 AC Furnace Air F...

Filtrete

Product Review Score

4.68 out of 5 stars

16 reviews

$60.00

Filterbuy 24x25x4 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 23.75 x 24.75 x 3.63 Inches)

Filterbuy 24x25x4 Air Filter MERV 11 Allergen...

Filterbuy

Product Review Score

4.95 out of 5 stars

178 reviews

$115.29

Filterbuy 16x24x4 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.38 x 23.38 x 3.63 Inches)

Filterbuy 16x24x4 Air Filter MERV 8 Dust Defe...

Filterbuy

Product Review Score

4.6 out of 5 stars

225 reviews

$105.12

Aerostar 12x24x4 MERV 8, Pleated Air Filter, 12 x 24 x 4, Box of 6, Made in The USA

Aerostar 12x24x4 MERV 8, Pleated Air Filter,...

Aerostar

Product Review Score

4.32 out of 5 stars

217 reviews

$74.99

Filterbuy 20x24x4 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 19.38 x 23.38 x 3.63 Inches)

Filterbuy 20x24x4 Air Filter MERV 8 Dust Defe...

Filterbuy

Product Review Score

4.95 out of 5 stars

145 reviews

$72.72

Filterbuy 24x25x4 Air Filter MERV 13 Optimal Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 23.75 x 24.75 x 3.63 Inches)

Filterbuy 24x25x4 Air Filter MERV 13 Optimal...

Filterbuy

Product Review Score

4.39 out of 5 stars

65 reviews

$77.85

Filterbuy 20x23x5 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters for Bryant, Carrier, BDP, Day & Night, and Payne (Actual Size: 19.81 x 22.56 x 4.25 Inches)

Filterbuy 20x23x5 Air Filter MERV 8 Dust Defe...

Filterbuy

Product Review Score

4.99 out of 5 stars

123 reviews

$96.24

Aerostar 20x22x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 19 3/4"x21 3/4"x3/4")

Aerostar 20x22x1 MERV 11 Pleated Air Filter,...

Aerostar

Product Review Score

4.33 out of 5 stars

208 reviews

$59.40

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.