4" Furnace Filters

4" replacement furnace filters are available in many standard and non-standard sizes. Simply select your size from the drop down box below to choose your filter size. Keep in mind that length and width are reversible (i.e. a 15x20x4 is the same as a 20x15x4).

 

16x20x4 MERV 11 - 3 Pack
$54.99

16x20x4 MERV 11 - 3 Pack

15-1/2 x 19-1/2 x 3-3/4

$54.99
16x25x4 MERV 8 - 4 Pack
$59.99

16x25x4 MERV 8 - 4 Pack

15-1/2 x 24-1/2 x 3-3/4

$59.99
16x25x4 MERV 8 - 3 Pack
$49.99

16x25x4 MERV 8 - 3 Pack

15-1/2 x 24-1/2 x 3-3/4

$49.99
16x25x4 Merv 11 - 4 Pack
$74.99

16x25x4 Merv 11 - 4 Pack

15-1/2 x 24-1/2 x 3-3/4

$74.99
16x25x4 MERV 11
$54.99

16x25x4 MERV 11

15-1/2 x 24-1/2 x 3-3/4

$54.99
16x25x4 MERV 13 - 3 Pack
$72.95

16x25x4 MERV 13 - 3 Pack

15-1/2 x 24-1/2 x 3-3/4

$72.95
16x25x4 MERV 13 - 4 Pack
$89.95

16x25x4 MERV 13 - 4 Pack

15-1/2 x 24-1/2 x 3-3/4

$89.95
20x20x4 MERV 11 - 4 Pack
$74.99

20x20x4 MERV 11 - 4 Pack

19-1/2 x 19-1/2 x 3-3/4

$74.99