18x20x4 MERV 11 Pleated Air Filter

• 18x20x4 MERV 11 filters made and manufactured by FilterBuy
• Actual Size 17.5x19.5x3.75"
• Attracts and captures pet dander, lint, dust, pollen, dust mite debris, mold spores, smoke, and smog.
• Ideal for standard and residential commercial use
• Designed to last 90 days. Replace regularly for optimum performance.
• Free shipping on all orders!

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4 18x20x4 Air Filter for 22.99 each

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Choose another SizeSelect Size6 7/8 x 15 7/8 x 1 6.88x15.88x2 6.88x15.88x4 8x14x1 8x14x2 8x14x4 8x16x1 8x16x2 8x16x4 8x20x1 8x20x2 8x20x4 8x24x1 8x24x2 8x24x4 8x30x1 8x30x2 8x30x4 9x30x1 9.75x23.75x1 9.75x23.75x2 9.75x23.75x4 10x10x1 10x10x2 10x10x4 10x14x1 10x14x2 10x14x4 10x15x1 10x15x2 10x15x4 10x16x1 10x16x2 10x16x4 10x18x1 10x18x2 10x18x4 10x20x1 10x20x2 10x20x4 10x24x1 10x24x2 10x24x4 10x25x1 10x25x2 10x25x4 10x28x1 10x30x1 10x30x2 10x30x4 11.25x11.25x1 11.25x11.25x2 11.25x11.25x4 11.25x19.25x1 11.25x19.25x2 11.25x19.25x4 11.25x23.25x1 11.25x23.25x2 11.25x23.25x4 11.5x21x1 11.5x21x2 11.5x21x4 11.88x16.88x1 12x12x1 12x12x2 12x12x4 12x15x1 12x15x2 12x15x4 12x16x1 12x16x2 12x16x4 12x18x1 12x18x2 12x18x4 12x20x1 12x20x2 12x20x4 12x22x1 12x22x2 12x22x4 12x24x1 12x24x2 12x24x4 12x25x1 12x25x2 12x25x4 12x26x1 12x26x2 12x26x4 12x26.5x1 12x26.5x2 12x26.5x4 12x27x1 12x27x2 12x27x4 12x30x1 12x30x2 12x30x4 12x30.5x1 12x30.5x2 12x30.5x4 12x34x1 12x36x1 12x36x2 12x36x4 12.5x21x1 12.5x21x2 12.5x21x4 12.75x21x1 12.75x21x2 12.75x21x4 13x18x1 13x18x2 13x18x4 13x20x1 13x20x2 13x20x4 13x21x1 13x21x2 13x21x4 13x21.5x1 13x21.5x2 13x21.5x4 13x24x1 13x24x2 13x24x4 13x25x1 13.25x13.25x1 13.25x13.25x2 13.25x13.25x4 14x14x1 14x14x2 14x14x4 14x18x1 14x18x2 14x18x4 14x20x1 14x20x2 14x20x4 14x22x1 14x22x2 14x22x4 14x24x1 14x24x2 14x24x4 14x25x1 14x25x2 14x25x4 14x27x1 14x27x2 14x27x4 14x28x1 14x28x2 14x28x4 14x30x1 14x30x2 14x30x4 14x36x1 14x36x2 14x36x4 14.5x19x1 14.5x19x2 14.5x19x4 15x15x1 15x15x2 15x15x4 15x20x1 15x20x2 15x20x4 15x25x1 15x25x2 15x25x4 15x30x1 15x30x2 15x30x4 15x30.5x1 15x30.5x2 15x30.5x4 15x30.75x1 15x30.75x2 15x30.75x4 15.25x15.25x1 15.25x15.25x2 15.25x15.25x4 15.5x29x1 16x16x1 16x16x2 16x16x4 16x18x1 16x18x2 16x18x4 16x20x1 16x20x2 16x20x4 16x21x1 16x21x2 16x21x4 16x21.5x1 16x21.5x2 16x21.5x4 16x22x1 16x22x2 16x22x4 16x22.25x1 16x22.25x2 16x22.25x4 16x24x1 16x24x2 16x24x4 16x25x1 16x25x2 16x25x4 16x30x1 16x30x2 16x30x4 16x32x1 16x32x2 16x32x4 16x36x1 16x36x2 16x36x4 16.25x21x2 16.25x21x4 16.25x21.25x1 16.25x21.25x2 16.25x21.25x4 16.38x21.38x1 16.38x21.38x2 16.38x21.38x4 16.38x21.5x1 16.5x21x1 16.5x21x2 16.5x21x4 16.5x22x1 16.5x22x2 16.5x22x4 17x17x1 17x17x2 17x17x4 17x19x1 17x19x2 17x19x4 17x20x1 17x20x2 17x20x4 17x21x1 17x21x2 17x21x4 17x22x1 17x22x2 17x22x4 17x25x1 17x25x2 17x25x4 17.25x17.25x1 17.25x17.25x2 17.25x17.25x4 17.25x19.25x1 17.25x19.25x2 17.25x19.25x4 17.25x23.25x1 17.25x23.25x2 17.25x23.25x4 17.25x26x1 17.25x26x2 17.25x26x4 17.25x29.25x1 17.25x29.25x2 17.25x29.25x4 17.25x35.25x1 17.25x35.25x2 17.25x35.25x4 17.5x22x1 17.5x23.5x1 17.5x23.5x2 17.5x23.5x4 17.5x27x1 17.5x27x2 17.5x27x4 18x18x1 18x18x2 18x18x4 18x20x1 18x20x2 18x20x4 18x22x1 18x22x2 18x22x4 18x24x1 18x24x2 18x24x4 18x25x1 18x25x2 18x25x4 18x30x1 18x30x2 18x30x4 18x36x1 18x36x2 18x36x4 18.25x22x1 18.25x22x2 18.25x22x4 19x19x1 19x19x2 19x19x4 19x21x1 19x21x2 19x21x4 19x21.5x1 19x21.5x2 19x21.5x4 19x22x1 19x22x2 19x22x4 19x23x1 19x23x2 19x23x4 19x27x1 19x27x2 19x27x4 19.25x21.25x1 19.25x21.25x2 19.25x21.25x4 19.25x23.25x1 19.25x23.25x2 19.25x23.25x4 19.5x21x1 19.5x21x2 19.5x21x4 19.5x22x1 19.5x22x2 19.5x22x4 19.75x21x1 19.75x21x2 19.75x21x4 19.75x22x1 19.75x22x2 19.75x22x4 19.88x21.5x1 19.88x21.5x2 19.88x21.5x4 20x20x1 20x20x2 20x20x4 20x21x1 20x21x2 20x21x4 20x21.5x1 20x21.5x2 20x21.5x4 20x22x1 20x22x2 20x22x4 20x22.25x1 20x22.25x2 20x22.25x4 20x23x1 20x23x2 20x23x4 20x24x1 20x24x2 20x24x4 20x25x1 20x25x2 20x25x4 20x27x1 20x27x2 20x27x4 20x30x1 20x30x2 20x30x4 20x32x1 20x32x2 20x32x4 20x34x1 20x34x2 20x34x4 20x36x1 20x36x2 20x36x4 21x21x1 21x21x2 21x21x4 21x22x1 21x22x2 21x22x4 21x23x1 21x23x2 21x23x4 21x23.25x1 21x23.25x2 21x23.25x4 21.25x21.25x1 21.25x21.25x2 21.25x21.25x4 21.5x23x1 21.5x23x2 21.5x23x4 21.5x23.25x1 21.5x23.25x2 21.5x23.25x4 21.5x24x1 21.5x24x2 21.5x24x4 21.5x26x1 21.5x26x2 21.5x26x4 22x22x1 22x22x2 22x22x4 22x24x1 22x24x2 22x24x4 22x26x1 22x26x2 22x26x4 22x28x1 22x28x2 22x28x4 22x36x1 22x36x2 22x36x4 22.25x25x1 22.25x25x2 22.25 x 25 x 4" 23x25x1 23x25x2 23x25x4 23.25x29.25x1 23.25x29.25x2 23.25x29.25x4 23.5x23.5x1 23.5x23.5x2 23.5x23.5x4 23.5x25x1 23.5x25x2 23.5x25x4 23.5x30.75x1 23.5x30.75x4 24x24x1 24x24x2 24x24x4 24x25x1 24x25x2 24x25x4 24x28x1 24x28x2 24x28x4 24x30x1 24x30x2 24x30x4 24x36x1 24x36x2 24x36x4 25x25x1 25x25x2 25x25x4 25x28x1 25x28x2 25x28x4 25x29x1 25x29x2 25x29x4 25x32x1 25x32x2 25x32x4 27x27x1 27x27x2 27x27x4 28x30x1 28x30x2 28x30x4 29x29x1 29x29x2 29x29x4 29x30x2 30x30x1 30x30x2 30x30x4 30x32x1 30x32x2 30x36x1 30x36x2 30x36x4

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