1. All Filters

2. Air Filtration Guide  >   OEM Size vs. Compatible Filter Sizes

Yes, your filter should fit snugly without having to be forced into place. In general, as long as the sizing is within 1/4", the difference is not going to cause any kind of significant problems. For example, Carrier FILXXFNC0017 vs. our replacement, SpiroPure SP-16x20x5W-P8M2. The FILXXFNC0017 is 15-5/8" (15.625") x 19-13/16" (19.8125") x 4-5/16" (4.3125") while the SpiroPure filter is 15-1/2" (15.5”) x 19-3/4"(19.75”) x 4-5/16" (4.3125”). In this case the difference is less than 1/8" of an inch, and the SpiroPure filter should fit your system with no issues.