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CLICK HERE FOR ADDITIONAL FILTERS FOR THIS KIT Filter Upgrade Kit for Aprilaire / Space-Gard Model 2400 Air Cleaner Improve the efficiency of your Aprilaire / Space-Gard Model 2400 Air Cleaner with this new upgrade kit. The kit includes everything you need to upgrade your filter from MERV 10 to MERV 13 efficiency rating - a 65% improvement. This kit would replace filter part number 401, or any other filter you are using in your model 2400 air cleaner. ALSO say goodbye to messy filter assembly, and pleat spacers. The new MERV 13 media simply slides into your existing air cleaner. This kit offers a permanent upgrade to a more efficient filter you can change yourself! The kit includes: • (1) MERV 13 rated media filter • Metal frame base and supports - these simply snap together - no tools required • Door spacer - easily inserts into back of door insuring tight seal and eliminating air bypass The benefits are clear: • Replaces part # 4272 inner housing • The kit is easy to construct and install - no tools required • More efficient filtration • No more inconvenient and frustrating filter assembly • No more pleat spacer combs required • Reduced installation time • Uses patented Aprilaire media • Keeps your heating and cooling system running at peak efficiency saving energy • Protects the life of your heating and cooling system