The 1413 Combo Pack includes the 1413 upgrade kit (the snap-together frame as well as 413 MERV 13 pop-up filter) and an additional 413 MERV 13 pop-up filter!

The Aprilaire 1413 Upgrade Kit is used to upgrade your existing Aprilaire / Space-Gard 2400 air cleaner to a MERV 13 pop-up filter.
The upgrade kit replaces the inner housing of your existing Aprilaire / Space-Gard filter cabinet and eliminates the need for pleat spacers! It is a Quick and Easy upgrade to improve the efficiency of your existing filter system.

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Watch this short instructional video to see how the new Aprilaire 1413 Upgrade Kit works!

Once this upgrade kit is installed, your Aprilaire / Space-Gard 2400 filter cabinet will use the new Aprilaire 413 MERV 13 pop-up media filter, which can be found here: Aprilaire 413 Replacement Filter Aprilaire 1413 Upgrade Kit Manual