Air filter size lookup

Enter the nominal size printed on your filter frame, like 16x25x1. Each size, and each size plus MERV combination we carry, also has its own page.

Don't see a match? Email us your filter size: tamara@madmaxsupply.com

Shows the filters we carry in that size. See all air filters · What size furnace filter do I need?.

All sizes we carry

Each size has its own page. What size furnace filter do I need?

• 12x12x1 air filter · MERV 8
• 12x24x1 air filter · MERV 11
• 14x20x1 air filter · MERV 8
• 15x20x1 air filter · MERV 11
• 16x16x1 air filter · MERV 11
• 16x20x1 air filter · MERV 8, 11, 13
• 16x20x4 air filter · MERV 13
• 16x24x1 air filter · MERV 12
• 16x25x1 air filter · MERV 8, 11, 13
• 16x25x4 air filter · MERV 8, 11, 13
• 16x28x6 air filter · MERV 8, 11
• 18x30x1 air filter · MERV 11
• 19x20x4 air filter · MERV 8, 11, 13
• 20x20x1 air filter · MERV 8, 11, 13
• 20x20x4 air filter · MERV 11
• 20x20x5 air filter · MERV 8, 11
• 20x25x1 air filter · MERV 8, 11
• 20x25x4 air filter · MERV 11, 13
• 20x25x6 air filter · MERV 8, 11
• 20x30x1 air filter · MERV 11, 13
• 21x26x5 air filter · MERV 8, 11
• 24x24x1 air filter · MERV 11