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Clenair CA401 Aprilaire & Spacegard Replacements Use with Aprilaire & Spacegard 2400 These Merv 11 filter media are direct replacement for the Aprilaire Spacegard 201 and 401. The new string-less, glued pleat spacing design makes for an easier and faster installation. These replacement filters can be used in the hundreds of thousands of installed Spacegard filters across the U.S., and compact package and repeat business make them a contractor favorite.
