FREE shipping in the continental U.S. on orders over $100!

4 Inch

Filter
16x25x4 (3 5/8) Pleated MERV 12 Air Filters
Quickshop Compare
20x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon
Quickshop Compare
20x24x4 (3 5/8) Pleated MERV 14 Air Filters
Quickshop Compare
28x30x4 (3 5/8) Pleated MERV 8 Air Filters
Quickshop Compare

Nordic Pure

28x30x4 (3 5/8) Pleated MERV 8 Air Filters
Regular price $113.47 $125.47 Sale price
Add to Cart
28x30x4 (3 5/8) Pleated MERV 15 Air Filters
Quickshop Compare

Nordic Pure

28x30x4 (3 5/8) Pleated MERV 15 Air Filters
Regular price $193.81 $205.81 Sale price
Add to Cart
28x30x4 (3 5/8) Pleated MERV 14 Air Filters
Quickshop Compare

Nordic Pure

28x30x4 (3 5/8) Pleated MERV 14 Air Filters
Regular price $222.79 $234.79 Sale price
Add to Cart
28x30x4 (3 5/8) Pleated MERV 13 Air Filters
Quickshop Compare

Nordic Pure

28x30x4 (3 5/8) Pleated MERV 13 Air Filters
Regular price $203.47 $215.47 Sale price
Add to Cart
28x30x4 (3 5/8) Pleated MERV 12 Air Filters
Quickshop Compare

Nordic Pure

28x30x4 (3 5/8) Pleated MERV 12 Air Filters
Regular price $113.88 $125.88 Sale price
Add to Cart
28x30x4 (3 5/8) Pleated MERV 10 Air Filters
Quickshop Compare

Nordic Pure

28x30x4 (3 5/8) Pleated MERV 10 Air Filters
Regular price $111.38 $123.38 Sale price
Add to Cart
24x24x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon
Quickshop Compare

Nordic Pure

24x24x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon
Regular price $43.11 $55.11 Sale price
Add to Cart
24x24x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon
Quickshop Compare

Nordic Pure

24x24x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon
Regular price $44.09 $56.09 Sale price
Add to Cart
24x24x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon
Quickshop Compare

Nordic Pure

24x24x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon
Regular price $43.60 $55.60 Sale price
Add to Cart
24x24x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filter
Quickshop Compare

Nordic Pure

24x24x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filter
Regular price $51.93 $63.93 Sale price
Add to Cart
24x24x4 (3 5/8) Pleated MERV 8 Air Filters
Quickshop Compare

Nordic Pure

24x24x4 (3 5/8) Pleated MERV 8 Air Filters
Regular price $39.19 $51.19 Sale price
Add to Cart
24x24x4 (3 5/8) Pleated MERV 7 Air Filters
Quickshop Compare

Nordic Pure

24x24x4 (3 5/8) Pleated MERV 7 Air Filters
Regular price $38.70 $50.70 Sale price
Add to Cart