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11.25x11.25x3.63 (3)
11.25x19.25x3.63 (3)
11.25x23.25x3.63 (3)
11.5x11.5x3.63 (3)
11.5x14.5x3.63 (3)
11.5x15.5x3.63 (3)
11.5x19.5x3.63 (3)
11.5x21.5x3.63 (3)
11.5x21x3.63 (3)
11.5x24.5x3.63 (3)
11.5x25.5x3.63 (3)
11.5x26.5x3.63 (3)
11.5x29.5x3.63 (3)
11.5x35.5x3.63 (3)
11.75x17.75x3.63 (3)
11.75x23.75x3.63 (3)
12.5x17.5x3.63 (3)
12.5x19.5x3.63 (3)
12.5x20.5x3.63 (3)
12.5x21x3.63 (3)
12.5x23.5x3.63 (3)
12.5x24.5x3.63 (3)
12.75x21x3.63 (3)
12x26.5x3.63 (3)
12x30.5x3.63 (3)
13.25x13.25x3.63 (3)
13.5x13.5x3.63 (3)
13.5x17.5x3.63 (3)
13.5x19.5x3.63 (3)
13.5x21.5x3.63 (3)
13.5x23.5x3.63 (3)
13.5x24.5x3.63 (3)
13.5x26.5x3.63 (3)
13.5x27.5x3.63 (3)
13.5x29.5x3.63 (3)
13.5x35.5x3.63 (3)
10x18x1 (0)
10x18x2 (0)
11.25x11.25x1 (0)
11.25x11.25x2 (0)
11.25x19.25x1 (0)
11.25x19.25x2 (0)
11.25x23.25x1 (0)
11.25x23.25x2 (0)
11.5x11.5x1 (0)
11.5x11.5x2 (0)
11.5x14.5x1 (0)
11.5x14.5x2 (0)
11.5x15.5x1 (0)
11.5x15.5x2 (0)
11.5x17.5x1 (0)
11.5x19.5x1 (0)
11.5x19.5x2 (0)
11.5x21x1 (0)
11.5x21x2 (0)
11.5x23.5x1 (0)
11.5x24.5x1 (0)
11.5x24.5x2 (0)
11.5x25.5x1 (0)
11.5x25.5x2 (0)
11.5x26.5x1 (0)
11.5x26.5x2 (0)
11.5x29.5x1 (0)
11.5x29.5x2 (0)
11.5x35.5x1 (0)
11.5x35.5x2 (0)
11.75x11.75x1 (0)
11.75x17.75x2 (0)
11.75x23.75x2 (0)
11.88x16.88x2 (0)
12.5x21x1 (0)
12.5x21x2 (0)
12.5x24.5x1 (0)
12.5x24.5x2 (0)
12.75x21x1 (0)
12.75x21x2 (0)
12x22x1 (0)
12x22x2 (0)
12x26.5x1 (0)
12x26.5x2 (0)
12x30.5x1 (0)
12x30.5x2 (0)
13.25x13.25x1 (0)
13.25x13.25x2 (0)
13.5x13.5x2 (0)
13.5x17.5x1 (0)
13.5x17.5x2 (0)
13.5x19.5x2 (0)
13.5x23.5x2 (0)
13.5x24.5x2 (0)
13.5x27.5x1 (0)
13.5x27.5x2 (0)
13.5x29.5x1 (0)
13.5x29.5x2 (0)
13.5x35.5x1 (0)
13.5x35.5x2 (0)
13.75x13.75x1 (0)
13.75x19.75x1 (0)
13.75x21.75x1 (0)
13.75x23.75x1 (0)

SEARCH BY FILTER SIZE

Build your own custom AC or furnace filter in a few easy steps
Nominal Size
Actual Size
Merv Rating

Bulk Quantity Pricing

1-4 6 12 48 72 120
Quantity

18x24x4

17.5x23.5x3.63

MERV 11

$18.77 $16.89 $16.52 $15.95 $14.08 $13.14
Add to Cart

18x24x4

17.5x23.5x3.63

MERV 13

$25.16 $22.64 $22.14 $21.39 $18.87 $17.61
Add to Cart

18x24x4

17.5x23.5x3.63

MERV 8

$12.40 $11.16 $10.91 $10.54 $9.30 $8.68
Add to Cart

18x25x4

17.5x24.5x3.63

MERV 11

$28.23 $25.41 $24.84 $24.00 $21.17 $19.76
Add to Cart

18x25x4

17.5x24.5x3.63

MERV 13

$27.45 $24.71 $24.16 $23.33 $20.59 $19.22
Add to Cart

18x25x4

17.5x24.5x3.63

MERV 8

$26.40 $23.76 $23.23 $22.44 $19.80 $18.48
Add to Cart

18x30x4

17.5x29.5x3.63

MERV 11

$29.89 $26.90 $26.30 $25.41 $22.42 $20.92
Add to Cart

18x30x4

17.5x29.5x3.63

MERV 13

$27.45 $24.71 $24.16 $23.33 $20.59 $19.22
Add to Cart

18x30x4

17.5x29.5x3.63

MERV 8

$27.93 $25.14 $24.58 $23.74 $20.95 $19.55
Add to Cart

18x36x4

17.5x35.5x3.63

MERV 11

$43.77 $39.39 $38.52 $37.20 $32.83 $30.64
Add to Cart