40% off your first year through Nov 30. Applied automatically at checkout.

Find your size

Your size is printed on the edge of your current filter (for example, 16x25x1). Tap it below.

Each size is a full year of filters, shipped free. From $7.08 a month, billed yearly. Cancel anytime.

Most common sizes

16x25x1 16x20x1 20x25x1 20x20x1 14x20x1 14x25x1 16x25x4 20x25x4

1-inch thick (standard)

10x20x1 10x25x1 12x12x1 12x20x1 12x24x1 12x25x1 12x30x1 14x14x1 14x20x1 14x24x1 14x25x1 14x30x1 15x20x1 16x16x1 16x20x1 16x24x1 16x25x1 16x30x1 18x18x1 18x20x1 18x24x1 18x25x1 20x20x1 20x22x1 20x24x1 20x25x1 20x30x1 22x22x1 24x24x1 24x25x1 24x30x1 25x25x1

4-inch thick (media filters)

16x20x4 16x25x4 20x20x4 20x24x4 20x25x4

5-inch thick (media filters)

16x25x5 20x20x5 20x25x5

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