Find Your Filter
Select your filter dimensions in any order — we'll find the match
Tip: The size is printed on the side of your current filter (e.g. 16x25x1). Enter the first two numbers in either order.
4" Air Filters
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12X24X4 HVAC Air Filter | Factor Filter™
From $108.99
/case of 6
$18.16/filter
16X20X4 HVAC Air Filter | Factor Filter™
From $111.99
/case of 6
$18.66/filter
16X25X4.375 HVAC Air Filter MERV 13 | Factor Filter™
$328.68
/case of 6
$54.78/filter
16X25X4 HVAC Air Filter | Factor Filter™
From $119.99
/case of 6
$19.99/filter
18X24X4 HVAC Air Filter | Factor Filter™
From $148.99
/case of 6
$24.83/filter
20X20X4.375 HVAC Air Filter MERV 13 | Factor Filter™
$271.62
/case of 6
$45.27/filter
20X20X4 HVAC Air Filter | Factor Filter™
From $127.99
/case of 6
$21.33/filter
20X24X4 HVAC Air Filter | Factor Filter™
From $160.99
/case of 6
$26.83/filter
20X25X4 HVAC Air Filter | Factor Filter™
From $151.99
/case of 6
$25.33/filter