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.
4" Air Filters
Explore our selection of 4 inch air filters designed for optimal air quality and efficiency
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
21x24x1 MERV 8 Filters - 4-Pack
Filter King
Product Review Score
4.93 out of 5 stars
91 reviews$44.96
Filter King MERV 8 Filters 5-Pack
Filter King
Product Review Score
4.42 out of 5 stars
137 reviews$49.95
21x22x1 MERV 8 Filters (2-Pack)
Filterbuy
Product Review Score
4.57 out of 5 stars
59 reviews$34.44
20x21x1 MERV 11 Air Filters (2-Pack)
Filterbuy
Product Review Score
4.89 out of 5 stars
66 reviews$36.70
21x21 MERV 13 Air Filters - 6 Pack
Filter King
Product Review Score
4.44 out of 5 stars
32 reviews$59.94
Filtrete MERV 8 Air Filters
Filtrete
Product Review Score
4.37 out of 5 stars
76 reviews$55.92 $39.92
Glasfloss ZL MERV 10 Filters - 4 Pack
Glasfloss
Product Review Score
4.1 out of 5 stars
86 reviews$46.98
MERV 8 Air Filter 4-Pack
Filter King
Product Review Score
4.18 out of 5 stars
79 reviews$35.99 $33.99
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.