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20x Inch Air Filters

20 Inch High Air Filters

20 inch air filters furnace ac20x_x_  inch air filters come in various widths.  


Save with our Filter 6-packs. Most filters are bundled into 6-packs so the price you see is the price for all 6.
These filters have actual height measurements between 19.5"-19.75" on the smaller side. We also have 20 inch square filters and other filter sizes.

Most replacement air filters are 1" deep, but we also offer air filters that are 2" deep, 4" deep for residential units and up to 5" or 6" thick for commercial a/c and furnace units.

Actual side dimension of a 20" filter is usually 19 5/8" or so, but they are referred to as 20" filters. So the difference between stated size (nominal) and actual measured size is rounded up with the whole number found on the side of the old filter cartridge.

Find the 20"x  filter size stamped on the side of your old filter cartridge or measure the length and width of your existing filter.

Many of the 20" filters offered in this section have SAME DAY SHIPPING if ordered before 1:00 p.m EST with free FedEx ground shipping.

Most Popular and Best Selling 20" home air furnace filters and air conditioner filters

20x20x1 20x20x4 20x24x1
20x25x1 20x25x5 20x30x1