Replacement Filters

Purchase a selection of air filters directly from our site.

Field Controls FlexFilter

Field Controls FlexFilter 16x25x4 / 20x25x4 MERV 11 Air Filter


The patented FlexFilter™ from Field Controls is an ultra compact, easy-to-assemble media air cleaner that replace at least 25 of the most popular models. With seven high efficiency MERV 11 models to choose from, stocking, storing, shipping, and installing media air cleaners just got a whole lot easier.

  • Actual size: Flexible between 16 x 25 x 4 (in.) and 20 x 25 x 4 (in.)
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