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The patented FlexFilter is an ultra compact, easy-to-assemble media air cleaner that replaces over 40 of the most popular filter models.

Our FlexFilter replaces nearly all major brands, so there is no need track down the manufacturer’s specific filter since we have it. Plus most FlexFilters can be configured for 2 sizes. It is 2 filters in 1. FlexFilter are shipped collapsed and come shrink wrapped with a disposal bag for the old filter.

FLEX-5.5 (20 x 25 x 4) fits Aprilaire air cleaner models: 1210, 2210, 3210, 4200, 1213, 2120, and 1213, and replaces Aprilaire filter models 210 and 213.

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